A new study from <a href="https://www.osu.edu/">Ohio State University</a> reveals what is going on inside of your <a href="https://www.earth.com/news/gut-brain-interactions-have-an-influence-on-diseases/">brain</a> when you get lost in a fictional fantasy. The experts discovered that the more immersed we become in the lives of our favorite characters of fiction, the more our brain activity reflects how much we identify with them.
&#8220;When they think about a favorite fictional character, it appears similar in one part of the brain as when they are thinking about themselves,&#8221; said study lead author Timothy Broom.
The research was focused on self-described fans of the HBO series &#8220;Game of Thrones.&#8221; The individuals were instructed to think about themselves, nine of their friends, and nine characters from the drama series. The participants also reported on which character they felt closest to and liked the most.
According to Broom, Game of Thrones was ideal for this study because it attracted a devoted fan base and the large cast presented a variety of characters that people could become attached to.
One of the key findings involved participants who scored highest on &#8220;trait identification.&#8221; These individuals agreed most strongly with statements like &#8220;I really get involved in the feelings of the characters in a novel.&#8221;
&#8220;People who are high in trait identification not only get absorbed into a story, they also are really absorbed into a particular character,&#8221; said Broom. &#8220;They report matching the thoughts of the character, they are thinking what the character is thinking, they are feeling what the character is feeling. They are inhabiting the role of that character.&#8221;
The researchers used an fMRI machine to measure activity in various parts of the brain through small changes in blood flow. As the participants&#8217; brains were scanned, they were evaluating themselves, their friends, and Game of Thrones characters. 
A part of the brain called the ventral medial prefrontal cortex (vMPFC) is known to show increased activity when people think about themselves and, to a lesser extent, when they think about close friends.
While in the fMRI, the individuals were shown a series of names &#8211; including themselves, friends, or characters &#8211; along with a trait, such as lonely, sad, trustworthy, or smart. The participants simply said &#8220;yes&#8221; or &#8220;no&#8221; to imply whether the trait fit the person.
As expected, the vMPFC was most active when people were evaluating themselves, less active when they evaluated friends, and least active when they evaluated characters from Game of Thrones.
However, among those who were high in trait identification, the vMPFC was more active when they thought about the fictional characters than it was for participants who identified less with the characters. This region of the brain was particularly active when the individuals evaluated the character they identified with the most.
Study co-author Dylan Wanger said the findings help explain how fiction can have such a big impact on some people.
&#8220;For some people, fiction is a chance to take on new identities, to see worlds though others&#8217; eyes and return from those experiences changed,&#8221; said Wagner.
&#8220;What previous studies have found is that when people experience stories as if they were one of the characters, a connection is made with that character, and the character becomes intwined with the self. In our study, we see evidence of that in their brains.&#8221;
The study is published in the journal <a href="https://academic.oup.com/scan">Social Cognitive and Affective Neuroscience</a>.
&#8211;&#8212;
By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

What happens in your brain while you're lost in fiction

Have you ever noticed how memories from the same day seem to blend together, while events that happened weeks apart feel like they exist in totally separate mental files? 



A new study sheds light on why this happens - and it’s not because of what’s happening in the main body of brain cells. Instead, the secret lies in the tiny branches called dendrites.



In a recent study, scientists from <a href="https://www.osu.edu/" target="_blank" rel="noreferrer noopener">The Ohio State University</a> used advanced imaging tools, including miniaturized microscopes, to track how mice formed memories in real time. 



The team focused on a lesser-known part of the brain cell - dendrites, the slender projections that stretch out from neurons. These branches are known for receiving information, but they’re much more active than previously thought.



<h2 class="wp-block-heading" id="h-small-branches-big-role">Small branches, big role</h2>



The researchers zeroed in on the retrosplenial cortex (RSC), a brain area involved in spatial and contextual memory.



When mice were introduced to two different environments close together in time, something remarkable happened: the memories of those places became linked. 



If the mice were later given a small shock in just one of the environments, they reacted with fear in both. Their brains treated the two places as connected - even though only one was associated with the unpleasant experience.



“If you think of a <a href="https://www.earth.com/news/first-complete-map-of-every-neuron-in-the-brain-revealed/" target="_blank" rel="noreferrer noopener">neuron</a> as a computer, dendrites are like tiny computers inside it, each performing its own calculations,” said study lead author Megha Sehgal.



“This discovery shows that our brains can link information arriving close in time to the same dendritic location, expanding our understanding of how memories are organized.”



<h2 class="wp-block-heading" id="h-communication-between-neurons">Communication between neurons </h2>



The researchers studied how dendrites change during the process of learning and storing information. On the surface of these branches are small bumps called spines - tiny hubs where communication between neurons happens.



When a new memory was formed, they saw clusters of these spines pop up. Then, if another memory formed shortly after, those same spots were more likely to attract additional spines.



This physical clustering of connections appears to be how the brain binds related <a href="https://www.earth.com/news/we-often-undervalue-the-most-meaningful-experiences-in-life/" target="_blank" rel="noreferrer noopener">experiences</a> together.



“The idea is that we don’t form memories in isolation. You don’t form a single memory. You use that memory, make a framework of memories, and then pull from that framework when you need to make adaptive decisions,” said Sehgal.



<h2 class="wp-block-heading" id="h-critical-role-of-dendrites">Critical role of dendrites</h2>



To test whether these dendritic branches were really causing the linking effect, the team used a method called optogenetics. This technique lets scientists control <a href="https://www.earth.com/news/mixed-emotions-linked-to-unique-brain-activity/" target="_blank" rel="noreferrer noopener">brain activity</a> using light. 



The experts reactivated the exact dendritic branches that had been used during one memory and found that doing so could link it to another, unrelated memory.



This confirmed the critical role that dendrites play in how memories are joined together in our brains.



<h2 class="wp-block-heading" id="h-understanding-memory-related-disorders">Understanding memory-related disorders</h2>



This discovery not only changes how we think about memory - it also opens the door to new ways of understanding <a href="https://www.earth.com/news/dementia-was-extremely-rare-in-ancient-times-so-why-is-it-now-so-prevalent/" target="_blank" rel="noreferrer noopener">memory-related disorders</a>.



If scientists can learn to influence how dendrites work, they may be able to treat conditions where memory formation or linking is impaired.



“Our work not only expands our understanding of how memories are formed but also suggests exciting new possibilities for manipulating higher order memory processes,” said Sehgal. “This could have implications for developing therapies for memory-related conditions such as <a href="https://www.earth.com/news/stopping-alzheimers-before-it-starts-early-treatment-shows-potential/" target="_blank" rel="noreferrer noopener">Alzheimer’s disease</a>.”



The research marks an important step in decoding the physical structure of memory -and it all starts with the tiny, busy branches inside each brain cell.



<h2 class="wp-block-heading" id="h-rethinking-memory-storage">Rethinking memory storage</h2>



This study encourages us to rethink how we view memory storage. Instead of seeing each experience as a separate snapshot, it may be more accurate to picture them as parts of a timeline - physically tied together through shared dendritic changes.



This could explain why certain days feel like a continuous stream of events, while others stand alone. 



The findings also suggest that how we mentally group events may depend more on timing than emotional weight. 



With a clearer picture of how the brain organizes information, scientists can better understand what happens when that system begins to fail, such as in age-related cognitive decline.



The full study was published in the journal <a href="https://www.nature.com/articles/s41593-025-01876-8" target="_blank" rel="noreferrer noopener">Nature Neuroscience</a>.



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Why memories close in time feel connected

Have you ever noticed how memories from the same day...

Climate change has long threatened species living in extreme habitats. Emperor penguins, iconic residents of Antarctica, now face a sharper edge of that threat. 



​A team led by scientists at the&nbsp;Woods Hole Oceanographic Institution (<a href="https://www.whoi.edu/press-room/news-release/new-study-finds-emperor-penguins-increasingly-threatened-by-climate-change/" target="_blank" rel="noreferrer noopener">WHOI</a>), along with global collaborators, has revealed new evidence that these birds are more at risk than previously believed.​



The study suggests emperor penguins should no longer be considered “Near Threatened.” Instead, the team recommends reclassifying them as&nbsp;<a href="https://www.sciencedirect.com/science/article/pii/S0006320719309899?" target="_blank" rel="noreferrer noopener">“Vulnerable” or even “Endangered”</a>. This shift, based on&nbsp;<a href="https://www.iucnredlist.org/species/22697752/132600320?" target="_blank" rel="noreferrer noopener">updated IUCN criteria</a>, highlights an urgent need to reconsider current conservation strategies.



The researchers tailored their study to match the <a href="https://www.earth.com/news/just-a-whiff-of-penguin-poop-can-send-krill-into-a-frenzy/" target="_blank" rel="noreferrer noopener">penguins</a>’ deep dependence on stable sea ice and predictable Antarctic conditions. The changing environment now places them on unstable ground.



<h2 class="wp-block-heading" id="h-climate-threats-to-emperor-penguins">Climate threats to emperor penguins </h2>



Emperor penguins are at significant risk of extinction due to climate change, particularly the rapid loss of Antarctic sea ice, which they depend on for breeding and raising their chicks. 



Studies suggest that if current warming trends continue, more than 90% of emperor penguin colonies could be gone by the end of the century. 



Some projections indicate that major population declines could happen much sooner, potentially within our lifetime.



<h2 class="wp-block-heading" id="h-significance-of-the-study">Significance of the study </h2>



Published in Biological Conservation, the paper titled Living with Uncertainty presents new tools to predict future risks. The researchers used a cutting-edge method: the Multi-Model Large Ensemble (MMLE) framework.



This approach combines numerous Earth system simulations to capture a fuller picture of possible <a href="https://www.earth.com/news/enhanced-monitoring-of-emperor-penguins-can-help-us-save-them/" target="_blank" rel="noreferrer noopener">environmental futures</a>.



“This is the first study to integrate natural variability in physical and biological processes and employ a wide range of Earth system and ecological models to account for numerous sources of uncertainty in projecting assessments of future population trajectories,” said Stéphanie Jenouvrier, lead author and senior scientist at WHOI.



“Improved methods for accounting for uncertainties are urgently needed to strengthen assessments of extinction and inform conservation efforts in an uncertain world.”



The framework improves how scientists handle uncertainty in environmental modeling. Instead of relying on a single future scenario, the MMLE considers many outcomes. This change offers deeper insight into extinction risks.



<h2 class="wp-block-heading" id="h-the-world-is-changing-for-emperor-penguins">The world is changing for emperor penguins</h2>



To build their models, the team used a wide variety of data. These included satellite images of 50 <a href="https://www.earth.com/news/african-penguins-have-lost-97-percent-of-their-population/" target="_blank" rel="noreferrer noopener">penguin colonies</a>, long-term monitoring of chicks and adults, and over a decade of observations of individual birds. The researchers also factored in how colonies move, drawn from genetic and population data.



“There are quantifiable uncertainties in projections of future environmental conditions,” said Jenouvrier. “Incorporating this uncertainty in ecosystem projections allows for a more complete and robust assessment of potential extinction risk.”



This approach blends fieldwork, satellite technology, and ecological theory. It gives conservationists a more grounded look at future risks. Such forecasts help shape stronger policies - especially when dealing with species that live in remote or harsh environments.



<h2 class="wp-block-heading" id="h-a-model-for-future-conservation">A model for future conservation</h2>



Professor Phil Trathan, one of the study’s authors and formerly Head of Conservation Biology at the <a href="https://www.bas.ac.uk/" target="_blank" rel="noreferrer noopener">British Antarctic Survey</a>, emphasized the broader meaning of this research.



“Emperor <a href="https://www.earth.com/news/emperor-penguins-are-struggling-to-survive-as-sea-ice-vanishes/" target="_blank" rel="noreferrer noopener">penguins</a> are vital indicators of ecosystem health in the Antarctic, they also help inform us about wider changes in the earth system. Therefore, harnessing robust models that increase our understanding about uncertainty and risk are vital, if we are to better conserve and protect this and other species.”



“Ultimately, humans depend upon the natural world, so developing better projections of the future earth system are essential for ensuring human health and well-being. The tools used in this study should now help us all.”



The combination of modeling tools and diverse data points may set a precedent for future work. Other species in similarly vulnerable habitats may also benefit from these techniques.



<h2 class="wp-block-heading" id="h-protecting-emperor-penguins">Protecting emperor penguins</h2>



The IUCN plays a central role in shaping how species like the emperor penguin are protected. The Red List guides many conservation decisions, often influencing discussions at international levels.



These include forums like the&nbsp;Antarctic Treaty Consultative Meeting (<a href="https://www.ats.aq/e/atcm.html" target="_blank" rel="noreferrer noopener">ATCM</a>)&nbsp;and the&nbsp;Convention on the Conservation of Antarctic Marine Living Resources (<a href="https://www.ccamlr.org/" target="_blank" rel="noreferrer noopener">CCAMLR</a>).​



“The Antarctic Treaty Consultative Meeting serves as a key forum for decision-making on Antarctic conservation. This new IUCN Red List assessment provides critical scientific support for strengthening protections for emperor penguins under the Antarctic Treaty System,” noted Jenouvrier.



”It also strengthens the case for establishing Marine Protected Areas (MPAs) under the Convention on the Conservation of Antarctic Marine Living Resources, particularly in vital regions like the Ross Sea and the Weddell Sea, which could serve as crucial refugia for emperor penguins.” 



With the scientific foundation now laid, the next step lies with policymakers. If taken seriously, this reassessment may not only protect emperor penguins but also influence how we respond to global climate threats across species and continents.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S0006320725000746" target="_blank" rel="noreferrer noopener">Biological Conservation</a>.



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Emperor penguins may disappear in our lifetime

Climate change has long threatened species living in extreme habitats....

In every classroom, on every street, there are teenagers quietly battling depression. It’s a growing crisis, one that does not treat everyone equally. Around the world, depression strikes women twice as often as men. 



This disparity begins not in adulthood but during adolescence. While hormones, social pressure, and life events all play roles, new science is pointing to something deeper - something biological.



A new study published in&nbsp;Biological Psychiatry&nbsp;explores how <a href="https://www.earth.com/news/people-with-chronic-pain-have-high-rates-of-depression-and-anxiety/" target="_blank" rel="noreferrer noopener">brain chemistry</a> may drive this gender divide. It focuses on a lesser-known series of chemical reactions in the brain called the "kynurenine pathway."



This pathway has long been studied in adults with depression, but for the first time, scientists have turned their attention to teenagers. The goal was to find out whether differences in this brain chemistry could explain why depression takes root more strongly in adolescent girls.



<h2 class="wp-block-heading" id="h-biological-drivers-for-depression">Biological drivers for depression </h2>



Tryptophan breaks into two key products. Kynurenic acid protects the <a href="https://www.earth.com/news/stress-related-brain-inflammation-linked-to-depression/" target="_blank" rel="noreferrer noopener">brain</a>. Quinolinic acid harms it. These chemicals may influence how depression develops. 



The researchers focused on this pathway in teenagers, examining how these brain chemicals differ between boys and girls.​



“Adolescence is a time when many <a href="https://www.earth.com/news/young-adult-depression-linked-to-worse-memory-skills/" target="_blank" rel="noreferrer noopener">changes occur in the brain</a> and body but we still know very little about the possible biological drivers for depression and how this might affect the difference between teenage boys and girls,“ said Professor Valeria Mondelli from King’s IoPPN.



“Our study indicates the ‘kynurenine pathway’ plays a role in development of depression during the teenage years which may help us to understand why there is a higher incidence amongst girls."



“During adolescence there are a wide range of social and individual factors that influence mental health and by identifying the biological pathways involved we hope we can help build a clearer picture of how we can help teenagers manage depression.”



<h2 class="wp-block-heading" id="h-teen-girls-with-a-chemical-imbalance">Teen girls with a chemical imbalance </h2>



The teenagers, aged between 14 and 16, were placed into three distinct groups based on their <a href="https://www.earth.com/news/teens-with-problematic-smartphone-use-suffer-from-depression/" target="_blank" rel="noreferrer noopener">mental health</a> profiles: those with low risk of depression, those considered high risk, and those already diagnosed with depression. 



Each group included 50 adolescents, with an equal number of boys and girls. To determine risk levels, the researchers used an assessment developed as part of the IDEA project, which evaluates various psychological and social factors.



The participants were then tracked over a period of three years to observe whether their symptoms improved or remained.



The findings revealed that teens with a high risk of depression or a current diagnosis had lower levels of kynurenic acid, a chemical known to protect the brain. 



This decrease was especially evident among girls, suggesting that an imbalance in the kynurenine pathway may affect them more severely during adolescence.



<h2 class="wp-block-heading" id="h-inflammation-and-its-role-in-depression">Inflammation and its role in depression</h2>



The experts also measured proteins that show inflammation. These markers rise during infection or stress. 



The researchers found high inflammation levels linked to more quinolinic acid. This means inflammation could push the kynurenine pathway toward damage.



This pattern appeared only in high-risk or depressed teens. Low-risk teens did not show the same chemical changes. That points to inflammation as a driver of depression’s deeper roots in the brain.



<h2 class="wp-block-heading" id="h-persistent-depression-in-teen-girls">Persistent depression in teen girls</h2>



Three years later, the researchers checked back in. Girls with ongoing depression had more neurotoxic chemicals in their blood. Those who improved had lower levels, suggesting that a long-term <a href="https://www.earth.com/news/psilocybin-therapy-offers-hope-for-millions-with-depression/" target="_blank" rel="noreferrer noopener">chemical imbalance</a> might slow recovery.



“Our study indicates that the measurement of chemicals involved in the kynurenine pathway could potentially help identify those who at risk of persistent depression, particularly amongst females, as well as inform the approaches we take to providing support,“ said Dr. Naghmeh Nikkheslat, the study’s first author.



“This insight could help develop more targeted support for teenagers with depression through interventions that work in a range of ways on the kynurenine pathway from medication to lifestyle changes such as diet and exercise.”



<h2 class="wp-block-heading" id="h-personalized-support-is-needed">Personalized support is needed</h2>



This research could change how we detect and treat teen depression. Measuring brain-related chemicals may help flag those most at risk. With more data, doctors might offer depression support earlier, especially to girls.



By linking biology to <a href="https://www.earth.com/news/millions-of-americans-have-lost-years-of-time-to-poor-mental-health/" target="_blank" rel="noreferrer noopener">mental health</a>, the study brings new options to the table. It offers hope for more effective, personal care in the teenage years.



Funded by <a href="https://www.mqmentalhealth.org/" target="_blank" rel="noreferrer noopener">MQ Mental Health Research</a>, the research received support from the <a href="https://www.maudsleybrc.nihr.ac.uk/" target="_blank" rel="noreferrer noopener">NIHR Maudsley Biomedical Research Centre</a>. 



The study is published in the journal <a href="https://www.biologicalpsychiatryjournal.com/article/S0006-3223(24)01789-X/fulltext" target="_blank" rel="noreferrer noopener">Biological Psychiatry</a>.



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Why teen girls struggle more with depression

In every classroom, on every street, there are teenagers quietly...

Antibiotic resistance is rising. Infections spread unchecked as old treatments fail. The next solution may come not from labs, but from swamps and forests. Frogs - ancient survivors of earth’s changing ecosystems - have evolved powerful natural defenses. These defenses may hold the key to future antibiotics.



Frogs thrive in environments teeming with microbes. Yet, they rarely suffer <a href="https://www.earth.com/news/bacteria-pass-down-their-memories-to-fight-viruses/" target="_blank" rel="noreferrer noopener">infections</a>. That mystery has long intrigued researchers. Could frogs be carrying biological secrets that might save human lives?



​A new study led by&nbsp;Professor Cesar de la Fuente&nbsp;at the&nbsp;<a href="https://www.upenn.edu/" target="_blank" rel="noreferrer noopener">University of Pennsylvania</a>&nbsp;believes the answer is yes.&nbsp;His team is tapping into the molecular defenses of frogs to design synthetic antibiotics that may defeat drug-resistant bacteria.​



<h2 class="wp-block-heading" id="h-frog-evolution-shaped-powerful-antibiotics">Frog evolution shaped powerful antibiotics</h2>



Frogs have existed for over 200 million years. They have spread across continents and climates, adapting to jungles, rivers, deserts, and subarctic forests. Living in moist, microbe-rich environments, frogs constantly face bacterial threats. 



To survive, many species evolved antimicrobial peptides in their skin. These natural compounds kill harmful bacteria on contact. Unlike traditional antibiotics, they do not easily trigger resistance.



One frog species, Odorrana andersonii, has become the focus of research. It produces a peptide known as Andersonnin-D1. Chinese scientists first identified it in 2012. 



Despite its strength against bacteria, the peptide clumps together, making it less effective and more toxic. Because of this flaw, it cannot be used in clinical medicine without modification.



<h2 class="wp-block-heading" id="h-mission-to-rebuild-nature-s-blueprints">Mission to rebuild nature’s blueprints</h2>



Professor Cesar de la Fuente’s lab works at the intersection of biology, engineering, and synthetic chemistry. His team looks for inspiration in nature’s forgotten corners. 



Their earlier work explored ancient DNA from extinct animals like the woolly mammoth and Neanderthals. They also investigated the human gut microbiome, home to countless natural compounds.



“Each study is motivated by imagining environments where evolution would spur the creation of antibiotics,” said de la Fuente.



“Amphibians live in very microbe-rich environments. They very rarely get infected despite being surrounded by microbes, so they must produce antimicrobial compounds.”



Inspired by this evolutionary logic, the team set out to redesign Andersonnin-D1. The goal was to remove its dangerous tendencies while keeping its bacterial-fighting power.



<h2 class="wp-block-heading" id="h-improving-frog-antibiotics-in-the-lab">Improving frog antibiotics in the lab</h2>



Using structure-guided design, the researchers altered the chemical structure of Andersonnin-D1. This approach allows experts to make small, deliberate changes to a molecule’s sequence and observe the effects.



Marcelo Torres is a research associate in the de la Fuente lab and co-author of the paper.



“With structure-guided design, we change the sequence of the molecule. And then we see how those mutations affect the function that we are trying to improve," said Torres.



This method generated several synthetic peptides. These versions kept the strong <a href="https://www.earth.com/news/cigarette-waste-fuels-antibiotic-resistance/" target="_blank" rel="noreferrer noopener">antimicrobial effect</a> but avoided the clumping that caused toxicity in the original. 



Each design aimed for maximum precision, producing molecules more suitable for real-world use.



<h2 class="wp-block-heading" id="h-putting-the-molecules-to-the-test">Putting the molecules to the test</h2>



Designing new&nbsp;frog-based&nbsp;antibiotics is only the beginning. To prove their value, the synthetic peptides had to succeed in rigorous lab tests. 



The team exposed the molecules to a range of harmful <a href="https://www.earth.com/news/antibiotic-resistance-could-cause-a-health-crisis-globally/" target="_blank" rel="noreferrer noopener">bacteria</a>. The results were promising. In preclinical models, the peptides matched the strength of polymyxin B - a last-resort drug used when others fail.



More importantly, these synthetic antibiotics showed low toxicity. They left human cells unharmed and did not disrupt beneficial gut bacteria. This makes them more targeted and less harmful than many existing drugs. The lab tested the peptides in both simple and complex bacterial communities.



“Those experiments are very difficult to set up because you need to grow different bacteria at once,” says de la Fuente. “We had to come up with the specific ratio of each bacterium to have a sustained community.”



These community-based models better reflect the conditions of real <a href="https://www.earth.com/news/antimicrobial-resistance-could-cause-39-million-deaths-by-2050/" target="_blank" rel="noreferrer noopener">infections</a> in the human body.



<h2 class="wp-block-heading" id="h-steps-toward-clinical-use">Steps toward clinical use</h2>



If additional studies continue to show strong results, the team will prepare for Investigational New Drug (IND) enabling studies. 



These tests assess safety and efficacy before a drug can be submitted to the U.S. Food and Drug Administration. Only after passing these stages can the peptides move into clinical trials involving human patients.



“We are excited that frogs - and nature in general - can inspire new molecules that could be developed into antibiotics,” said de la Fuente. “Thanks to the power of engineering, we can take those natural molecules and turn them into something more useful for humanity.”



This line of research represents a fusion of <a href="https://www.earth.com/news/soil-plays-an-overlooked-role-in-antibiotic-resistance/" target="_blank" rel="noreferrer noopener">evolutionary biology</a> and advanced engineering. It shows how careful study of nature’s own defenses can guide the creation of life-saving medicines.



<h2 class="wp-block-heading" id="h-nature-s-role-in-innovation">Nature’s role in innovation</h2>



The research was conducted at the University of Pennsylvania’s <a href="https://www.seas.upenn.edu/" target="_blank" rel="noreferrer noopener">School of Engineering and Applied Science</a>. It was supported by funding from organizations such as the National Institutes of Health (<a href="https://www.nih.gov/" target="_blank" rel="noreferrer noopener">NIH</a>), the Defense Threat Reduction Agency (<a href="https://www.dtra.mil/" target="_blank" rel="noreferrer noopener">DTRA</a>), <a href="https://us.pg.com/" target="_blank" rel="noreferrer noopener">Procter &amp; Gamble</a>, and the <a href="https://www.aiche.org/giving" target="_blank" rel="noreferrer noopener">AIChE Foundation</a>.



The study is not just about frogs or antibiotics. It reflects a larger movement in science. Instead of only inventing new molecules from scratch, researchers are increasingly exploring the solutions that evolution already tested over millions of years.



Nature, shaped by survival, often creates molecules more elegant and efficient than anything built by human hands.



In this case, one frog’s molecular defense may lead to a major medical breakthrough. As the world searches for new antibiotics, it may be ancient animals - and the researchers who study them - that help protect our future.



The study is published in the journal <a href="https://dx.doi.org/10.1016/j.tibtech.2025.02.007" target="_blank" rel="noreferrer noopener">Trends in Biotechnology</a>.



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Frogs lead the way in developing new antibiotics

Antibiotic resistance is rising. Infections spread unchecked as old treatments...

We often think parenting begins after birth - diapers, lullabies, and sleepless nights. But what if a mother’s bond with her baby starts much earlier, long before the baby is born?



A recent study led by Dr. Nora Medina from <a href="https://www.jefferson.edu/" target="_blank" rel="noreferrer noopener">Thomas Jefferson University</a> suggests just that. 



Dr. Medina and her colleagues at the <a href="https://www.uchicago.edu/" target="_blank" rel="noreferrer noopener">University of Chicago</a> have shed light on how the emotional connection between mother and child during pregnancy lays the groundwork for future relationships.



This work goes beyond traditional research, which often begins after the child is born. By tracing bonds from the prenatal stage, Medina reveals new insight into how early experiences influence <a href="https://www.earth.com/news/moms-health-shapes-how-well-an-embryo-develops/" target="_blank" rel="noreferrer noopener">parenthood</a>. 



Her study focuses on a group often overlooked or misjudged - young, low-income, racially diverse mothers - and highlights their emotional resilience and strength. In doing so, she challenges long-held assumptions about who makes a good parent.



<h2 class="wp-block-heading" id="h-mother-child-bond-begins-before-birth">Mother-child bond begins before birth</h2>



Dr. Medina and her team followed 160 women from pregnancy through their children’s toddler years. The mothers came from racially diverse backgrounds and faced economic challenges. Yet within this group, the researchers discovered powerful stories of connection, <a href="https://www.earth.com/news/mothers-care-linked-to-the-evolution-of-longer-lifespans/" target="_blank" rel="noreferrer noopener">emotion, and care</a>.



Mothers who reported feeling emotionally connected to their babies during pregnancy later had stronger, more positive relationships with them. They interacted with greater sensitivity and warmth. These bonds weren’t fleeting emotions - they predicted lasting patterns in how mothers related to their toddlers over time.



On the other hand, mothers who had difficult experiences with their own parents struggled more to connect prenatally. 



These women often expressed frustration and anger in their early <a href="https://www.earth.com/news/eating-chili-during-pregnancy-may-actually-be-a-good-idea/" target="_blank" rel="noreferrer noopener">parenting</a>. The study reveals how cycles of emotional distance can repeat — but also how they can be identified and changed.



<h2 class="wp-block-heading" id="h-bonding-shapes-how-motherhood-begins">Bonding shapes how motherhood begins</h2>



Most parenting studies begin after childbirth. They examine how parents behave, what support systems they use, and how children respond. But Medina’s work shifts that focus to pregnancy itself - a time often treated as purely medical.



Her research fills a critical gap. The prenatal period isn’t just about physical development. It’s also an emotional window, where a parent begins forming their sense of identity and <a href="https://www.earth.com/news/all-of-your-energy-comes-from-mom-not-dad/" target="_blank" rel="noreferrer noopener">connection</a>. 



When that early bond feels strong, it can shape everything that comes after - from how a mother soothes her baby to how she sees herself in the role of a parent.



These findings suggest we need to rethink when parenting really begins. Pregnancy isn’t just preparation - it’s the beginning of a relationship.



<h2 class="wp-block-heading" id="h-young-mothers-can-build-strong-early-bonds">Young mothers can build strong early bonds</h2>



In addition to emotional insights, Dr. Medina’s study takes on harmful cultural stereotypes. Young, low-income mothers often carry the burden of negative assumptions. They are seen as disengaged or incapable. Medina wanted to counter that image with data from real lives.



“Parenting is challenging, and young, low-income mothers face additional stressors,” said Dr. Medina. “I focused on studying mother-infant relationships within this population to produce findings that may inform parenting support programs more closely aligned with the lived experiences of young, low-income mothers.”



The results contradict common misconceptions. The majority of participants reported strong prenatal connections. They continued to show care, attentiveness, and love as their children grew. 



This group, often painted in broad and negative strokes, revealed themselves as thoughtful, emotionally aware parents - navigating hardship with strength.



<h2 class="wp-block-heading" id="h-early-support-and-the-mother-baby-bond">Early support and the mother-baby bond</h2>



Dr. Medina believes our systems need to support mothers earlier in the journey. Too often, interventions wait until problems appear. Instead, she proposes we begin during pregnancy, when emotional connections are forming.



Dr. Medina suggests that support to promote strong parent-child relationships should begin during pregnancy. Interventions should help young mothers explore their past relationship experiences and recognize how they shape their expectations of parenthood. 



Programs that incorporate perinatal social workers or doulas could help facilitate these discussions and encourage healthier attachment patterns.



Support during pregnancy allows mothers to reflect on their own emotional histories. It also helps them build a sense of confidence and preparedness. 



Early conversations about relationships, expectations, and past trauma can have lasting effects on parenting style and connection.



<h2 class="wp-block-heading" id="h-access-remains-the-greatest-challenge">Access remains the greatest challenge</h2>



While the research offers clear solutions, one problem remains - access. Despite the promising insights, Dr. Medina says funding remains a key barrier to accessibility of such support programs.



Moving forward, she hopes to further investigate how familial and community-based support can help strengthen early mother-child bonds and improve long-term outcomes for young mothers and their children.



Her hope lies in community support networks - systems already embedded in many families’ lives. These local connections may offer flexible, culturally grounded ways to support young mothers. 



Medina’s future research will explore how family structures and neighborhood ties can reinforce early attachment.



Dr. Medina’s study invites us to expand our understanding of what it means to parent. Parenthood doesn’t begin with birth - it begins with emotion, intention, and connection. Her work reminds us that even in challenging circumstances, strong relationships can take root early.



The study is published in the journal <a href="https://onlinelibrary.wiley.com/doi/epdf/10.1002/imhj.22162" target="_blank" rel="noreferrer noopener">Infant Mental Health Journal Infancy and Early Childhood</a>.



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Mothers start bonding with their baby before delivery

We often think parenting begins after birth - diapers, lullabies,...

Ever heard of a rule that's been around for so long, everyone just assumes it's unbreakable? Well, a team of scientists is turning that notion on its head by proving wrong a key rule of organic chemistry.



Neil Garg, a distinguished professor of chemistry and biochemistry, is leading the charge to rewrite a fundamental principle that's been part of organic chemistry for the past hundred years.



In a recent study published in Science, Garg and his colleagues at <a href="https://www.ucla.edu" target="_blank" rel="noreferrer noopener">UCLA</a> revealed that Bredt's rule - a staple in chemistry textbooks since 1924 - might not be as ironclad as we've been led to believe.



But before we get into how they're shaking things up, let's take a step back and understand what this rule is all about.



<h2 class="wp-block-heading" id="h-what-exactly-is-bredt-s-rule">What exactly is Bredt's rule?</h2>



According to Bredt's rule, you can't have a double bond at the bridgehead position of a small, bridged ring system -- a kind of molecular structure that looks like two rings sharing some atoms. 



Imagine trying to fit a double bond in a tight space - it just doesn't work because the molecule becomes too strained and unstable.



In these small ring systems, the atoms are connected in such a way that there's not enough room for the flat shape of a <a href="https://www.earth.com/news/capturing-carbon-directly-from-the-air-is-now-much-more-efficient-thanks-to-new-material/" target="_blank" rel="noreferrer noopener">double bond</a>. 



The angles get all messed up, and the molecule would be forced into an awkward position. It's kind of like trying to bend a straight stick into a circle without breaking it - it just doesn't work that way.



Bredt's rule has been a guiding principle for chemists studying organic molecules, especially those known as olefins.



Olefins are compounds featuring a double bond between two <a href="https://www.earth.com/news/scientists-detect-molecules-that-store-carbon-in-space/" target="_blank" rel="noreferrer noopener">carbon atoms</a>, and they usually have a flat, planar structure.



<h2 class="wp-block-heading" id="h-turning-bredt-s-rule-upside-down">Turning Bredt's rule upside down</h2>



Garg's team decided to challenge that assumption. 



Instead of accepting the limitations imposed by this long-standing rule, they set out to prove that these molecules, called anti-Bredt olefins (ABOs), can indeed be created and used.



"People aren't exploring anti-Bredt olefins because they think they can't," Garg pointed out.



Using a clever approach, the researchers treated certain molecules known as silyl (pseudo)halides with a <a href="https://www.earth.com/news/is-water-fluoridation-still-effective/" target="_blank" rel="noreferrer noopener">fluoride source</a>. This reaction was designed to produce the elusive ABOs. 



Since these molecules are highly unstable and tend to fall apart quickly, the team included another chemical to "trap" them. 



This way, they could capture the ABOs long enough to study them and even use them to make new, valuable compounds.



<h2 class="wp-block-heading" id="h-understanding-abos-the-basics">Understanding ABOs - the basics</h2>



Anti-Bredt olefins, or ABOs, are a bit of a chemistry oddity. 



Normally, double bonds don’t like to hang out at the bridgehead position of a bicyclic compound - that’s where Bredt’s Rule comes in. 



It says that putting a double bond at a bridgehead is usually too strained, especially in small or medium-sized rings. 



The atoms just can’t line up the way they need to for a stable double bond. But anti-Bredt olefins break that rule. 



They do have a double bond at the bridgehead, and they manage to exist anyway - sometimes even with surprising stability.



<h2 class="wp-block-heading" id="h-why-does-this-matter">Why does this matter?</h2>



By showing that ABOs can be generated and utilized, the team is opening up new possibilities for <a href="https://www.earth.com/news/machine-learning-could-revolutionize-drug-discovery/" target="_blank" rel="noreferrer noopener">drug discovery</a>.



"There's a big push in the pharmaceutical industry to develop chemical reactions that give three-dimensional structures like ours because they can be used to discover new medicines," Garg explained. 



The ability to create these unique molecular structures means scientists can explore a whole new realm of compounds that were previously off-limits.



<h2 class="wp-block-heading" id="h-more-rules-need-to-be-challenged">More "rules" need to be challenged</h2>



Garg's work doesn't just break a rule -- it invites the entire scientific community to rethink how we approach long-held beliefs. 



"We shouldn't have rules like this -- or if we have them, they should only exist with the constant reminder that they're guidelines, not rules. It destroys creativity when we have rules that supposedly can't be overcome," he said.



By challenging Bredt's rule, the team is advocating for a more flexible and innovative approach to chemistry. 



They're reminding us that science is always evolving, and what we consider impossible today might just be tomorrow's breakthrough.



<h2 class="wp-block-heading" id="h-science-needs-more-creativity">Science needs more creativity</h2>



What does this mean for budding chemists and researchers? 



It's a call to question assumptions and push boundaries. If a century-old rule can be upended, who knows what other "impossible" feats are within reach?



"What this study shows is that contrary to one hundred years of conventional wisdom, chemists can make and use anti-Bredt olefins to make value-added products," Garg noted. 



It's not just about breaking a rule; it's about expanding the toolkit scientists have to tackle some of the world's most pressing challenges, like developing new medications.



<h2 class="wp-block-heading" id="h-what-s-next-for-garg-and-bredt-s-rule">What's next for Garg and Bredt's rule?</h2>



This discovery is a stepping stone to numerous possibilities in organic chemistry, pharmaceuticals, and basically any other field of study.



By demonstrating that ABOs can be both generated and trapped effectively, Garg's team has laid the groundwork for future research that could lead to significant advancements in medicine.



So, the next time you hear someone say, "You can't do that," remember that sometimes, all it takes is a fresh perspective and a willingness to challenge the status quo. 



Who knows? You might just be the one to rewrite the next chapter in the science books.



The full study was published in the journal <a href="https://www.science.org/doi/10.1126/science.adq3519" target="_blank" rel="noreferrer noopener">Science</a>.



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100-year-old chemistry rule proven false, updating textbooks comes next

Ever heard of a rule that's been around for so...

California,Wildflower,Super,Bloom,In,Carrizo,Plain,National,Monument,-

Flowers are more than just a sign of spring - they’re part of a natural rhythm shaped by light, temperature, and rainfall. Scientists are now studying that rhythm to better understand how our planet is changing.



A recent study has shown that wildflowers in California can be tracked from above using aircraft and space-based tools. 



The technology, originally designed by NASA’s Jet Propulsion Laboratory (<a href="https://www.jpl.nasa.gov/" target="_blank" rel="noreferrer noopener">JPL</a>), picks up subtle changes in color that occur during a plant’s life cycle.



These findings could offer a new way for farmers and natural-resource managers to monitor the health and timing of <a href="https://www.earth.com/news/tree-of-life-created-for-flowering-plants-using-400-million-specimens/" target="_blank" rel="noreferrer noopener">flowering plants</a>, which are essential to ecosystems and agriculture.



<h2 class="wp-block-heading" id="h-monitoring-seasonal-plant-life">Monitoring seasonal plant life</h2>



Scientists from the <a href="https://umd.edu/" target="_blank" rel="noreferrer noopener">University of Maryland-College Park</a> and NASA’s <a href="https://www.nasa.gov/goddard/" target="_blank" rel="noreferrer noopener">Goddard Space Flight Center</a> teamed up to test how remote sensing could capture large-scale flowering patterns.



They surveyed thousands of acres of protected land using a high-tech tool called an imaging spectrometer. 



Built by the Jet Propulsion Laboratory in Southern California, the instrument was mounted on a plane and scanned the land below as the plane flew along.



It recorded light in hundreds of narrow wavelength bands, far beyond what the human eye can see. This allowed it to map out the extent of <a href="https://www.earth.com/news/flowers-blooming-92-days-earlier-due-to-climate-change/" target="_blank" rel="noreferrer noopener">blooming</a> and fading flowers over several months.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/wildflowers_monitoring_imaging-spectrometer_airplane_nasa_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/wildflowers_monitoring_imaging-spectrometer_airplane_nasa_1s.webp" alt="In this illustration, an imaging spectrometer aboard a research plane measures sunlight reflecting off California coastal scrub. In the data cube below, the top panel shows the true-color view of the area. Lower panels depict the spectral fingerprint for every point in the image, capturing the visible range of light (blue, green, and red wavelengths) to the near-infrared (NIR) and beyond. Spatial resolution is around 16 feet (5 meters). Credit: NASA" class="wp-image-1963384"/></a><figcaption class="wp-element-caption">In this illustration, an imaging spectrometer aboard a research plane measures sunlight reflecting off California coastal scrub. In the data cube below, the top panel shows the true-color view of the area. Lower panels depict the spectral fingerprint for every point in the image, capturing the visible range of light (blue, green, and red wavelengths) to the near-infrared (NIR) and beyond. Spatial resolution is around 16 feet (5 meters). Click to enlarge Credit: NASA</figcaption></figure>



It was the first time the instrument had been deployed to track vegetation steadily through the growing season, making this a "first-of-a-kind study,” according to David Schimel, a research scientist at JPL.



The study of <a href="https://www.earth.com/news/massive-butterfly-migration-sparked-by-a-surge-in-vegetation/" target="_blank" rel="noreferrer noopener">vegetation</a> in relation to seasons is known as phenology and it is important to botanists and agriculturalists alike. From wildflowers to crops, most flowering plants are triggered by shifts in weather and daylight length. 



In addition, scientists are increasingly focused on this connection to monitor how ecosystems respond to warmer temperatures and shifting rainfall patterns.



<h2 class="wp-block-heading" id="h-why-flowers-are-hard-to-track">Why flowers are hard to track</h2>



Field surveys and time-lapse photography have long been used to monitor <a href="https://www.earth.com/news/wildflowers-are-self-fertilizing-to-deal-with-a-lack-of-pollinators/" target="_blank" rel="noreferrer noopener">wildflower</a> life histories. But those methods only offer a limited view.



“One challenge is that, compared to leaves or other parts of a plant, flowers can be pretty ephemeral,” said Yoseline Angel, a scientist from the University of Maryland-College Park and NASA’s Goddard Space Flight Center. “They may last only a few weeks.”



That fleeting nature makes it tough to gather reliable data, especially across large areas. Angel and her team turned to one of the most distinct traits of flowers - their color - as a way to study the timing of blooming from the sky.



<h2 class="wp-block-heading" id="h-science-behind-flower-color">Science behind flower color</h2>



The bright colors of flowers come from pigments that fall into three main groups. Carotenoids and betalains create yellow, orange, and red tones. Anthocyanins are behind the deep reds, purples, and blues. 



These pigments absorb and reflect light in unique ways, creating a “spectral fingerprint.” Using spectrometers, researchers can therefore scan light patterns to identify plants and even track changes as they grow and bloom. 



These tools have been used for decades to study Earth and other planets, but now they’re being fine-tuned to observe the seasonal changes in flowering plants.



In 2022, a spectrometer called <a href="https://avirisng.jpl.nasa.gov/" target="_blank" rel="noreferrer noopener">AVIRIS-NG</a> (Airborne Visible/InfraRed Imaging Spectrometer – Next Generation) flew over two nature preserves in Santa Barbara County: the Jack and Laura Dangermond Preserve and the Sedgwick Reserve.



Among the native plants monitored were Coreopsis gigantea and Artemisia californica. The scans ran from February to June.



The team developed a method to differentiate the flower signals from soil, leaves, and shadows. In doing so, they captured 97% of the spectral differences among those features and were able to pinpoint flowering stages with 80% accuracy.



<h2 class="wp-block-heading" id="h-from-wildflowers-to-agriculture">From wildflowers to agriculture</h2>



This method could one day help track flowering plants across the globe. 



Since flowers make up nearly 90% of <a href="https://www.earth.com/news/thousands-of-plant-species-remain-unphotographed/" target="_blank" rel="noreferrer noopener">plant species</a> on land, this kind of remote sensing could support a wide range of work - from ecology to food production.



A key goal, Angel noted, is to support farmers and land managers who rely on flowering plants - along with the insects and pollinators that depend on them. These plants are vital for producing fruits, nuts, cotton, and even many medicines.



She’s now applying the same technique to data from <a href="https://earth.jpl.nasa.gov/emit/" target="_blank" rel="noreferrer noopener">EMIT</a> (Earth Surface Mineral Dust Source Investigation), another NASA instrument that operates from the International Space Station.



While EMIT’s main purpose is to study mineral dust in dry regions, it can also detect plant pigments. 



By combining this space-based data with weather and environmental information, researchers may one day be able to predict events like <a href="https://www.earth.com/image/poppy-superbloom-in-the-california-desert/" target="_blank" rel="noreferrer noopener">superblooms</a> - rare bursts of flowers in the desert that follow heavy rains.



<h2 class="wp-block-heading" id="h-understanding-superblooms-the-basics">Understanding superblooms - the basics</h2>



Superblooms are nature’s way of showing off. They happen when a rare combo of perfect weather conditions - like heavy rains after a long drought - triggers wildflowers to explode across a landscape in crazy, vibrant color. 



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/superbloom_carrizo-plain-national-park_california_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/superbloom_carrizo-plain-national-park_california_1s.webp" alt="Wildflower super bloom in Carrizo Plain National Monument - one of the best place to see wildflowers in California" class="wp-image-1963388"/></a><figcaption class="wp-element-caption">Wildflower super bloom in Carrizo Plain National Monument - one of the best place to see wildflowers in California. Click to enlarge.</figcaption></figure>



Think entire valleys carpeted in orange poppies, purple lupines, and yellow goldfields, stretching as far as the eye can see. 



These blooms don’t just pop up anywhere; they’re most famous in arid places like California’s deserts, where wildflowers lie dormant in the soil, waiting years - sometimes decades - for just the right moment to wake up and party.



<h2 class="wp-block-heading" id="h-citizen-science-and-the-joy-of-flowers">Citizen science and the joy of flowers</h2>



Angel said one of the most rewarding parts of her research is seeing how much people love flowers. 



“I have social media alerts on my phone,” she added, sharing how she stays updated on wildflower sightings around the world.



As flowers continue to signal the pulse of the planet, new technologies are helping us pay closer attention - from the ground, the air, and even from space.



The full study was published in the journal <a href="https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecs2.70127" target="_blank" rel="noreferrer noopener">Ecosphere</a>.



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NASA tracks changes in seasonal flower cycles and migration patterns from the air

Flowers are more than just a sign of spring -...

NASA’s Curiosity rover has made another remarkable discovery on Mars - the largest organic compounds ever detected on the Red Planet. 



These <a href="https://www.youtube.com/watch?v=wektNJExGks" target="_blank" rel="noreferrer noopener">molecules</a>, discovered in a rock sample drilled in 2013, offer fresh insights into the potential of Mars to support life.



The findings suggest that <a href="https://www.earth.com/news/mars-curiosity-rover-finds-sulfur-crystals-martian-rock-hints-at-possible-life/" target="_blank" rel="noreferrer noopener">Mars</a> might have hosted more advanced prebiotic chemistry than scientists had assumed.



<h2 class="wp-block-heading" id="h-complex-molecules-in-martian-rock">Complex molecules in Martian rock</h2>



Inside Curiosity’s onboard mini-lab called SAM, scientists identified three organic molecules: decane, undecane, and dodecane. 



These compounds contain 10, 11, and 12 carbon atoms, respectively. The researchers believe they are remnants of fatty acids.



On Earth, fatty acids help form cell membranes. They can be produced through both biological and geological processes. 



For example, water interacting with rocks in hydrothermal vents can create fatty acids without the influence of living cells.



Still, detecting these molecules on Mars is a thrilling step. It shows that <a href="https://www.earth.com/news/did-mars-once-host-life-we-finally-know-where-to-look/" target="_blank" rel="noreferrer noopener">complex chemistry</a> did occur there.



<h2 class="wp-block-heading" id="h-long-awaited-sample-yields-new-surprises">Long-awaited sample yields new surprises</h2>



<a href="https://science.nasa.gov/mission/msl-curiosity/" target="_blank" rel="noreferrer noopener">Curiosity</a> drilled into the rock target “Cumberland” on May 19, 2013. The sample came from a location called Yellowknife Bay inside Gale Crater. 



At the time, scientists believed the area resembled an ancient lakebed. That guess turned out to be correct.



The rock was rich in clay, sulfur, and nitrates. All three materials help preserve organic compounds. Also present was methane with a carbon signature that, on Earth, often points to the presence of <a href="https://www.earth.com/news/detecting-life-on-mars-a-breakthrough-in-space-research/" target="_blank" rel="noreferrer noopener">life</a>.



“There is evidence that liquid water existed in Gale Crater for millions of years and probably much longer, which means there was enough time for life-forming chemistry to happen in these crater-lake environments on Mars,” said Daniel Glavin, senior scientist at NASA’s <a href="https://www.nasa.gov/goddard/" target="_blank" rel="noreferrer noopener">Goddard Space Flight Center</a>.



<h2 class="wp-block-heading" id="h-serendipitous-discovery-of-molecules">Serendipitous discovery of molecules</h2>



The discovery came during an unrelated experiment. Scientists were searching for amino acids in the Cumberland sample. They heated the sample and measured released gases. 



No amino acids were present. But instead, the experts found small amounts of decane, undecane, and dodecane.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/Mars-Hydrocarbons_discovery_Curiosity-Rover_Cumberland-rock_illustration_NASA_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/Mars-Hydrocarbons_discovery_Curiosity-Rover_Cumberland-rock_illustration_NASA_1s.webp" alt="This graphic shows the long-chain organic molecules decane, undecane, and dodecane. These are the largest organic molecules discovered on Mars to date. The rover, whose selfie is on the right side of the image, has been exploring Gale Crater since 2012. An image of the Cumberland drill hole is faintly visible in the background of the molecule chains. Credit: NASA/Dan Gallagher" class="wp-image-1963337"/></a><figcaption class="wp-element-caption">This graphic shows the long-chain organic molecules decane, undecane, and dodecane. These are the largest organic molecules discovered on Mars to date. The rover, whose selfie is on the right side of the image, has been exploring Gale Crater since 2012. An image of the Cumberland drill hole is faintly visible in the background of the molecule chains. Credit: NASA/Dan Gallagher</figcaption></figure>



These molecules could have broken off from longer ones during heating. Scientists traced them back to possible parent compounds: undecanoic acid, dodecanoic acid, and tridecanoic acid.



To confirm their findings, the researchers recreated the process in labs on Earth. They added undecanoic acid to Mars-like clay and heated it. It released decane, just like the <a href="https://www.earth.com/news/wave-ripples-discovered-mars-surface-indicate-liquid-water-present-4-billion-years-ago/" target="_blank" rel="noreferrer noopener">Martian sample</a> had.



<h2 class="wp-block-heading" id="h-martian-molecules-may-hint-at-past-life">Martian molecules may hint at past life</h2>



One interesting detail emerged. The detected fatty acids seem longer than those usually formed by geological activity. Non-biological processes tend to produce shorter chains - usually with fewer than 12 carbon atoms.



Cumberland’s molecules had 11 to 13 carbon atoms. That suggests either a unique chemical process or possible signs of past biology. However, SAM’s tools cannot detect the longest chains reliably.



“Our study proves that, even today, by analyzing Mars samples we could detect chemical signatures of past life, if it ever existed on Mars,” said Caroline Freissinet, the study’s lead author.



<h2 class="wp-block-heading" id="h-why-this-matters-for-future-missions">Why this matters for future missions</h2>



The research supports the idea that organic molecules can survive Mars’s harsh conditions. Radiation and oxidation often destroy organic molecules over time. The preservation in Cumberland gives scientists hope for future discoveries.



Curiosity’s instruments can only do so much. That’s why scientists are eager to return Mars samples to Earth.



“We are ready to take the next big step and bring <a href="https://www.earth.com/news/astonishing-discovery-of-minerals-on-mars-hints-at-a-habitable-past/" target="_blank" rel="noreferrer noopener">Mars</a> samples home to our labs to settle the debate about life on Mars,” stated Glavin.



<h2 class="wp-block-heading" id="h-search-for-life-linked-molecules">Search for life-linked molecules</h2>



​NASA's&nbsp;Curiosity rover&nbsp;continues its mission inside&nbsp;<a href="https://science.nasa.gov/resource/a-guide-to-gale-crater/" target="_blank" rel="noreferrer noopener">Gale Crater</a>, exploring rock layers to better understand Mars’s ancient environments.&nbsp;The&nbsp;Sample Analysis at Mars (<a href="https://ssed.gsfc.nasa.gov/sam/" target="_blank" rel="noreferrer noopener">SAM</a>) tool&nbsp;remains key to these investigations.



Every new sample adds another clue to a much larger puzzle. 



With each discovery, scientists move one step closer to exploring one of the oldest and most profound questions we’ve ever asked: Did life ever exist on Mars, and if so, what traces of it remain locked beneath the planet’s surface?



<a href="https://youtu.be/wektNJExGks" target="_blank" rel="noreferrer noopener">Watch NASA's video about this discovery here...</a>



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This research was supported by NASA’s&nbsp;<a href="https://mars.nasa.gov/" target="_blank" rel="noreferrer noopener">Mars Exploration Program</a>.&nbsp;Curiosity is managed by NASA’s&nbsp;Jet Propulsion Laboratory (<a href="https://www.jpl.nasa.gov/missions/mars-science-laboratory-curiosity-rover-msl/" target="_blank" rel="noreferrer noopener">JPL</a>)&nbsp;in Southern California.&nbsp;The&nbsp;Centre National d'Études Spatiales (<a href="https://cnes.fr/en" target="_blank" rel="noreferrer noopener">CNES</a>), the French Space Agency, contributed to SAM’s gas chromatograph system.​



The study is published in the journal <a href="https://www.pnas.org/doi/abs/10.1073/pnas.2420580122" target="_blank" rel="noreferrer noopener">Proceedings of the National Academy of Sciences</a>.



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Largest organic molecules ever found on Mars confirm that life can form there

NASA’s Curiosity rover has made another remarkable discovery on Mars...

Deep in the galaxy’s central molecular zone (CMZ), surrounding the supermassive black hole at the Milky Way’s center, clouds of dust and gas swirl amid energetic shock waves.&nbsp;



Now, a collaboration of international astronomers - using the Atacama Large Millimeter/submillimeter Array (<a href="https://www.almaobservatory.org/en/home/" target="_blank" rel="noreferrer noopener">ALMA</a>) - has greatly sharpened our view of these processes by a factor of 100.



The team has uncovered an unexpected class of long, narrow filaments within this turbulent region, giving fresh insight into the cyclical formation and destruction of material in the CMZ.



<h2 class="wp-block-heading" id="h-tracking-shock-generated-turbulence">Tracking shock-generated turbulence</h2>



Although researchers have long recognized the CMZ as a zone filled with ever-churning dust and gases, the driver behind these dynamic flows of matter had remained murky. 



Molecules in <a href="https://www.earth.com/news/fluffy-molecular-clouds-may-change-our-understanding-of-star-formation/" target="_blank" rel="noreferrer noopener">molecular clouds</a> serve as markers of different phenomena, with silicon monoxide (SiO) standing out as a tracer of shock waves.&nbsp;



By capitalizing on ALMA’s high sensitivity to identify multiple molecular emission lines, a team led by Kai Yang of <a href="https://en.sjtu.edu.cn/" target="_blank" rel="noreferrer noopener">Shanghai Jiao Tong University</a> has managed to map these slender filaments at an unprecedentedly fine scale. 



The findings reveal a striking interaction between shock-generated <a href="https://www.earth.com/news/even-microscopic-noises-could-trigger-spontaneous-turbulence/" target="_blank" rel="noreferrer noopener">turbulence</a> and the newly observed structures.



<h2 class="wp-block-heading" id="h-observing-a-turbulent-environment">Observing a turbulent environment</h2>



Because the CMZ lies so close to our galaxy’s central <a href="https://www.earth.com/news/milky-ways-black-hole-unleashes-mysterious-flares/" target="_blank" rel="noreferrer noopener">black hole</a>, it endures intense gravitational forces and frequent disturbances, making the environment especially dynamic. 



The narrow filaments now identified confirm that shock waves play a considerable role, stirring and redistributing material.



“When we checked the ALMA images showing the outflows, we noticed these long and narrow filaments spatially offset from any star-forming regions," Kai Yang explained.



"Unlike any objects we know, these filaments really surprised us. Since then, we have been pondering what they are."



These “slim filaments” emerged unexpectedly in the SiO emission lines - together with lines from eight other molecules - and present velocities along our line of sight that do not align with other, previously known filaments or outflows. 



On top of that, they display no correlation with <a href="https://www.earth.com/news/cosmic-map-reveals-that-the-milky-ways-dust-has-very-unusual-properties/" target="_blank" rel="noreferrer noopener">dust</a> emission and apparently lack hydrostatic equilibrium.



<h2 class="wp-block-heading" id="h-space-tornadoes-and-violent-gas-flow">Space tornadoes and violent gas flow</h2>



“Our research contributes to the fascinating Galactic Center landscape by uncovering these slim filaments as an important part of material circulation,” said Xing Lu, a research professor at the <a href="http://english.shao.cas.cn/" target="_blank" rel="noreferrer noopener">Shanghai Astronomical Observatory</a> and a corresponding author on the paper.



One interpretation is that these filaments act like channels for gas flow, and facilitate the integration or removal of shock-released molecules from the surrounding environment.



“We can envision these as space tornados: they are violent streams of gas, they dissipate quickly, and they distribute materials into the environment efficiently,” Lu added. 



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/space-tornadoes_discovered_center-milky-way_credit-Astronomy-Astrophysics_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/space-tornadoes_discovered_center-milky-way_credit-Astronomy-Astrophysics_1s.webp" alt="Slim filaments in the CMZ. Credit: Astronomy &amp; Astrophysics (2025)" class="wp-image-1963330"/></a><figcaption class="wp-element-caption">Slim filaments in the CMZ. Credit: Astronomy &amp; Astrophysics (2025). Click to enlarge.</figcaption></figure>



Determining exactly what triggers these filaments remains open to investigation, yet their presence points to a strong link with ongoing shock processes, according to the research team.



Based on several pieces of evidence - the detection of the SiO 5-4 rotational transition in ALMA data, the presence of CH3OH masers, and the abundances of complex organic molecules - the researchers inferred that these structures are shock-driven. 



Each shock event appears to release SiO and other organic compounds, injecting them into the interstellar medium.



<h2 class="wp-block-heading" id="h-how-space-tornadoes-emerge">How space tornadoes emerge</h2>



Yichen Zhang is a professor at Shanghai Jiao Tong University and a corresponding author of the paper.



"ALMA’s high angular resolution and extraordinary sensitivity were essential to detect these molecular line emissions associated with the slim filaments, and to confirm that there is no association between these structures with dust emissions,” said Zhang. 



“Our discovery marks a significant advancement, by detecting these filaments on a much finer 0.01 parsec scale to mark the working surface of these shocks.”



Understanding how these structures emerge offers a deeper look at CMZ dynamics. First, the hypothesized shock waves create filaments that emit certain molecular lines, distributing molecules such as CH3OH, CH3CN, and HC3N into the local environment. 



Next, the filaments decay, releasing newly shock-released materials across broader regions. 



Finally, the molecules, once again free in the gas phase, eventually re-freeze onto dust grains, preserving an equilibrium between depletion and replenishment in the CMZ. 



If these slim filaments are as common as the sample suggests, this cyclical process might be significant for the broader region’s matter budget.



<h2 class="wp-block-heading" id="h-vital-conduits-for-recycling-matter">Vital conduits for recycling matter</h2>



“SiO is currently the only molecule that exclusively traces shocks, and the SiO 5-4 rotational transition is only detectable in shocked regions that have both relatively high densities and high temperatures," Yang continued. 



"This makes it a particularly valuable tool for tracing shock-induced processes in the dense regions of the CMZ."



Such revelations cast the CMZ in a new light, highlighting shock waves as a central driver in reconfiguring dust, gas, and molecules. 



By fueling cyclical changes in chemical composition, these "space tornadoes" presumably leave their imprint on the formation and dissolution of clouds that might spawn new stars - or even feed material into the supermassive black hole.



With future ALMA surveys of multiple SiO transitions and wide-ranging observations over the CMZ, astronomers aim to corroborate the filaments’ shock origin and map their potential distribution across this turbulent galactic region.&nbsp;



These efforts, combined with advanced simulations, may confirm or refine the emerging hypothesis that “slim filaments” serve as vital conduits for recycling matter in and around the <a href="https://www.earth.com/news/galaxies-like-our-own-milky-way-are-not-unique/" target="_blank" rel="noreferrer noopener">Milky Way</a>’s center, thus shaping the environment in which stars and black holes interact.



The study is published in the journal <a href="https://dx.doi.org/10.1051/0004-6361/202453191" target="_blank" rel="noreferrer noopener">Astronomy &amp; Astrophysics</a>.



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'Space tornadoes' discovered at the center of our galaxy

Deep in the galaxy’s central molecular zone (CMZ), surrounding the...

Population genetics can reveal surprising insights about the ancestry of any group, often challenging assumptions that have persisted for centuries. Japan is a prime example, with many believing its people descend from only two main lines of ancestry. 



New evidence now indicates that there may be a third strand woven into the country’s genetic heritage. Researchers are examining DNA clues and clinical data to piece together a bigger story, and the results are shaking up conventional wisdom on what it really means to be Japanese.



A paper published in the journal Science Advances presented findings that suggest a far more intricate <a href="https://www.earth.com/news/recreating-the-face-of-dragon-man-harbin-skull-denisovans-an-ancient-human-cousin/" target="_blank" rel="noreferrer noopener">genetic tapestry</a> is involved in the ultimate ancestry of people in Japan than previously thought. 



The project behind this discovery is led by experts who investigated thousands of samples to paint a detailed picture of ancestry. 



After sifting through these clues, RIKEN’s Chikashi Terao and colleagues propose that a third group, the so-called Emishi people, is part of this fascinating blend.



Terao, who headed the study at RIKEN's <a href="https://www.riken.jp/en/research/labs/ims/" target="_blank" rel="noreferrer noopener">Center for Integrative Medical Sciences</a>, explains, “Our analysis revealed Japan's subpopulation structure on a fine scale, which is very beautifully classified according to geographical locations in the country.”



<h2 class="wp-block-heading" id="h-fresh-perspective-on-japanese-ancestry">Fresh perspective on Japanese ancestry</h2>



Researchers used whole-genome sequencing to analyze genetic information from more than 3,200 people across seven regions of Japan. 



This approach zooms in on all three billion DNA base-pairs, offering a much more comprehensive view compared to previous methods. 



Terao says, “Whole-genome sequencing gives us the chance to look at more data, which helps us find more interesting things.”



By examining the data, the team pinpointed differences that track with older population groups. Traditional narratives described only two main ancestral lines: the Jomon and the <a href="https://www.earth.com/news/dna-study-reveals-secrets-of-weedy-rice-invasion/" target="_blank" rel="noreferrer noopener">rice-farming</a> migrants from east Asia. 



The latest results identify a third source in the mix - people with connections to northeast Asia known as the Emishi. 



One key aspect of this research is the focus on subtle markers that illuminate how these historical groups spread out across the islands.



<h2 class="wp-block-heading" id="h-japan-s-ancestry-gets-clues-from-jewel">Japan's ancestry gets clues from JEWEL</h2>



The Japanese Encyclopedia of Whole-Genome/Exome Sequencing Library (JEWEL) combines genetic material with related medical and family information. 



The researchers gathered this data to explore health links and ancestry, creating a resource that also sheds light on how certain diseases appear in distinct areas. 



Terao remarks, “We reasoned that rare variants can sometimes be traced back to specific ancestral populations, and could be informative in revealing fine-scale <a href="https://www.earth.com/news/timeline-early-humans-great-migration-reached-america-challenged-again/" target="_blank" rel="noreferrer noopener">migration patterns</a> within Japan.”



According to the analysis, Jomon ancestry remains most prominent in Okinawa, appearing in 28.5% of the samples studied there, while it is lowest in western Japan at just 13.4%. 



Meanwhile, the study found that individuals in western regions have closer connections to Han Chinese people. 



The influx of migrants from east Asia between the year 250 and year 794 correlates with that finding. Emishi-related lineage appears strongest in the northeast, gradually dwindling as one moves westward.



<h2 class="wp-block-heading" id="h-rare-variants-and-their-role">Rare variants and their role</h2>



The study did more than trace broad patterns of ancestry. It also drilled down into uncommon gene variations to discover their potential involvement in various conditions. 



One particular variant of a gene called PTPRD has the potential to be highly damaging because it could be linked with hypertension, kidney failure, and myocardial infarction, according to Xiaoxi Liu, a senior scientist in Terao’s lab and the first author of the research. 



Additionally, significant incidences of variants in the GJB2 and ABCC2 genes were documented, tying them to hearing loss and chronic liver disease.



These clues demonstrate the practical potential of such extensive DNA surveys. By mapping rare changes, the researchers gain a sharper understanding of health outcomes, which may eventually guide new approaches to diagnosis or treatment. 



The JEWEL database thus provides a framework for aligning genetic signals with real-world health profiles.



<h2 class="wp-block-heading" id="h-clues-from-neanderthals-and-denisovans">Clues from Neanderthals and Denisovans</h2>



The project also examined segments inherited from <a href="https://www.earth.com/news/tinshemet-cave-more-evidence-neanderthals-and-early-humans-interacted-socially/" target="_blank" rel="noreferrer noopener">Neanderthals</a> and <a href="https://www.earth.com/news/mysterious-denisovan-species-humans-lived-undisturbed-tibetan-plateau-160000-years/" target="_blank" rel="noreferrer noopener">Denisovans</a>, two archaic human groups that intermixed with Homo sapiens millennia ago. 



Terao states, “We are interested in why ancient genomes are integrated and kept in modern human DNA sequences.” 



The team identified 44 ancient DNA regions present in Japanese people, many unique to East Asians. 



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/japanese_ancestry_introgressed-chart_credit-RIKEN_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/japanese_ancestry_introgressed-chart_credit-RIKEN_1s.webp" alt="Introgressed sequences from archaic Neanderthals or Denisovans in the Japanese population. Click to enlarge. Credit: RIKEN" class="wp-image-1963362"/></a><figcaption class="wp-element-caption">Introgressed sequences from archaic Neanderthals or Denisovans in the Japanese population. Click to enlarge. Credit: RIKEN</figcaption></figure>



Among these was a Denisovan-derived segment within the NKX6-1 gene, which may influence how individuals respond to semaglutide, a drug used to treat type 2 diabetes.



They also located 11 Neanderthal-derived segments possibly tied to several conditions, including coronary artery disease, prostate cancer, and rheumatoid arthritis. 



Researchers in other parts of the world have shown that <a href="https://www.earth.com/news/neanderthal-genes-make-you-more-of-a-morning-person/" target="_blank" rel="noreferrer noopener">archaic DNA</a> occasionally grants advantages in extreme environments or impacts susceptibility to illness. 



This new study adds fresh details to the ongoing search for connections between ancient genes and modern-day health.



<h2 class="wp-block-heading" id="h-japan-ancestry-and-human-health">Japan, ancestry, and human health</h2>



Scientists point out that large-scale genetic investigations have mostly centered on European samples. Terao is keen to expand the reach of JEWEL by including more DNA profiles from Asia and beyond. 



This broader approach could highlight unique markers and conditions that are otherwise overlooked. “We’d like to connect population differences with differences in genetics,” he observes.



Population research of this magnitude promises to clarify how certain traits, disorders, and susceptibilities arise. 



It may also help fine-tune healthcare for specific communities by showing which variants are most influential. At the same time, it shows that no population is as uniform as once believed. 



The new evidence highlights how three ancestral groups contributed to the current mosaic in Japan, blending the histories of the Jomon, east Asian migrants, and the Emishi people into a more complete picture of Japan’s past.



The full study was published in the journal <a href="https://www.science.org/doi/10.1126/sciadv.adi8419" target="_blank" rel="noreferrer noopener">Science Advances</a>.



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Who are the Japanese people? DNA study results upend previous beliefs

Population genetics can reveal surprising insights about the ancestry of...

The European Space Agency (ESA) has unveiled the first survey data from its Euclid mission. The images feature a spectacular collection of galaxies, clusters, and deep cosmic fields. 



This first, massive Euclid data release previews what will soon become one of the largest cosmic maps ever created.



Three deep field mosaics highlight hundreds of thousands of <a href="https://www.earth.com/news/strange-signals-from-the-center-of-our-galaxy-hint-at-a-new-kind-of-dark-matter/" target="_blank" rel="noreferrer noopener">galaxies</a>. Their shapes, brightness, and distributions offer a rich visual of the cosmic web. 



Each observation captures active galactic nuclei and rare, short-lived celestial events.



These glimpses already provide hints about the unseen forces shaping our <a href="https://www.earth.com/news/galaxy-found-in-the-early-universe-that-shouldnt-exist/" target="_blank" rel="noreferrer noopener">Universe</a>.



<h2 class="wp-block-heading" id="h-euclid-maps-26-million-galaxies">Euclid maps 26 million galaxies</h2>



The Euclid mission mapped 63 square degrees of galaxy-filled sky in just one week.



That area equals 300 full Moons. <a href="https://youtu.be/rXCBFlIpvfQ?si=jV1erYHoOnb-ggqy" target="_blank" rel="noreferrer noopener">It captured more than 26 million galaxies</a>, including quasars up to 10.5 billion light-years away. The plan is for Euclid to scan each of the three deep regions 30–52 times before 2030.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/Euclid_Galaxies-in-different-shapes_ESA_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/Euclid_Galaxies-in-different-shapes_ESA_1s.webp" alt="This image shows examples of galaxies in different shapes, all captured by Euclid during its first observations of the Deep Field areas. Credit: ESA" class="wp-image-1963131"/></a><figcaption class="wp-element-caption">This image shows examples of galaxies in different shapes, all captured by Euclid during its first observations of the Deep Field areas. Credit: ESA</figcaption></figure>



The final sky map will cover one-third of the sky, around 14,000 square degrees. 



These repeat passes will build an incredibly detailed 3D cosmic atlas that will help researchers explore how <a href="https://www.earth.com/news/andromeda-galaxy-shows-signs-of-violent-past-collisions/" target="_blank" rel="noreferrer noopener">galaxies formed</a> and how dark matter shaped their journey.



“We are unlocking a treasure trove of information for scientists to dive into,” stated Professor Carole Mundell, director of science at the European Space Agency (<a href="https://www.esa.int/" target="_blank" rel="noreferrer noopener">ESA</a>).



<h2 class="wp-block-heading" id="h-euclid-reveals-galaxy-web-structure">Euclid reveals galaxy web structure</h2>



Each new observation sharpens our view of the universe's large-scale structure. 



Filaments of normal and dark matter stretch across space like a vast web. These filaments are where <a href="https://www.earth.com/news/black-hole-radiation-may-actually-be-a-catalyst-for-life/" target="_blank" rel="noreferrer noopener">galaxies</a> formed and evolved. 



Euclid’s visible and near-infrared instruments offer precision in measuring the shapes and distances of these galaxies.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/Euclid_Deep-Field-South_70x-zoom_ESA_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/Euclid_Deep-Field-South_70x-zoom_ESA_1s.webp" alt="This image shows an area of Euclid’s Deep Field South. The area is zoomed in 70 times compared to the large mosaic. Credit: ESA" class="wp-image-1963129"/></a><figcaption class="wp-element-caption">This image shows an area of Euclid’s Deep Field South. The area is zoomed in 70 times compared to the large mosaic. Credit: ESA</figcaption></figure>



“Just think of the discoveries that await us,” noted Valeria Pettorino, an astrophysicist who works on the Euclid Project.



ESA scientists expect these images to refine our understanding of dark matter and dark energy. Together, these two invisible components make up 95% of the cosmos.



<h2 class="wp-block-heading" id="h-classifying-galaxies-by-shape-and-features">Classifying galaxies by shape and features </h2>



Euclid’s massive <a href="https://www.earth.com/news/spherex-will-scan-the-galaxy-to-look-for-lifes-ingredients/" target="_blank" rel="noreferrer noopener">galaxy</a> dataset requires fresh strategies. Every day, it sends back 100 GB of data. 



Scientists use AI models and citizen science to process this flood of information. A key result is a new catalogue of over 380,000 galaxies classified by shape and features.



“AI is a fundamental and necessary part of our process,” noted Mike Walmsley, a Euclid Consortium scientist based at the <a href="https://www.utoronto.ca/" target="_blank" rel="noreferrer noopener">University of Toronto</a>, Canada, who has been heavily involved in astronomical deep learning algorithms for the past decade. .



The Zoobot algorithm, trained by nearly 10,000 volunteers, now classifies galaxies by traits like spiral arms and mergers. This first catalogue is just 0.4% of what Euclid is expected to deliver.



<h2 class="wp-block-heading" id="h-gravitational-lenses-reveal-hidden-matter">Gravitational lenses reveal hidden matter</h2>



When light travels to us from faraway galaxies, it doesn't always move in a straight line. If it passes through matter - like a galaxy or a cluster of galaxies - on the way, the light gets bent. 



This bending is called gravitational lensing. It's a natural effect caused by gravity and helps scientists detect dark matter, which we can't see directly.



Using artificial intelligence and help from human volunteers, Euclid has already found 500 possible examples of strong gravitational lenses. Most of these had never been seen before.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/Euclid_strong-gravitational-lenses-captured_deep-field-south_ESA_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/Euclid_strong-gravitational-lenses-captured_deep-field-south_ESA_1s.webp" alt="This image shows examples of gravitational lenses that Euclid captured in its first observations of the Deep Field areas. Credit: ESA" class="wp-image-1963167"/></a><figcaption class="wp-element-caption">This image shows examples of gravitational lenses that Euclid captured in its first observations of the Deep Field areas. Credit: ESA</figcaption></figure>



By the end of the mission, it is anticipated that Euclid will find about 100,000 strong lenses. That’s a hundred times more than we currently know. 



Each one gives scientists a powerful tool to study how dark matter is spread out across the Universe and how galaxies are shaped by it.



“We are combining the strengths of Euclid, AI, citizen science, and experts into a single discovery engine,” said Pierre Ferruit, ESA’s Euclid mission manager.



<h2 class="wp-block-heading" id="h-what-s-next-for-the-euclid-mission">What’s next for the Euclid mission</h2>



By March 2025, Euclid had already scanned 2,000 square degrees of the sky, packed with galaxies. That’s about 14% of its total planned survey. This work is just the start. 



The mission will share its first full set of cosmology data in October 2026. That upcoming release will include many repeated observations of three special regions called deep fields. 



These repeated scans will give scientists a clearer, more detailed view of those distant parts of the Universe.



Euclid launched in July 2023. It began regular science work in February 2024. ESA built the spacecraft with support from NASA and companies like Thales Alenia Space and Airbus. 



The mission is backed by the Euclid Consortium, a global team of over 2,000 scientists from 15 countries.



You can now explore the first deep field images through the <a href="https://www.cosmos.esa.int/web/esdc/esasky" target="_blank" rel="noreferrer noopener">ESASky</a> platform. This is just the beginning. Euclid will continue to uncover the hidden structure of the cosmos.



Details of the latest Euclid Project images are available in this ESA <a href="https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_opens_data_treasure_trove_offers_glimpse_of_deep_fields" target="_blank" rel="noreferrer noopener">press release.</a>



Image Credit: ESA/Euclid/Euclid Consortium/NASA, image processing by M. Walmsley, M. Huertas-Company, J.-C. Cuillandre



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26 million galaxies captured in vivid deep field photos in just one week

The European Space Agency (ESA) has unveiled the first survey...

In the heart of the Lighthouse Reef Atoll, off the coast of Belize in the Caribbean, lies a fascinating geological wonder - the Great Blue Hole. This vast, circular sinkhole bears an uncanny resemblance to a giant oceanic eye gazing up at the sky.



Nestled in the turquoise waters of the atoll, about 43 miles from the coast of Belize, this dark circular pit is surrounded by coral and contains sediments that tell a story about centuries of storms.



The Great Blue Hole began as a limestone cave on a dry island. During the last ice age, its roof collapsed, leaving it open to the elements. 



Today, this underwater cave plunges to a depth of 410 feet, spans 980 feet, and is one of the most fascinating places to scuba dive.



As glaciers melted and sea levels rose, the cave filled with water, turning it into a natural vault of sediment that has quietly recorded the passage of time.



In the summer of 2022, a team of scientists from <a href="https://www.goethe-university-frankfurt.de/en" target="_blank" rel="noreferrer noopener">Goethe University Frankfurt</a> led a mission to explore this hidden archive. 



Funded by the German Research Foundation, the researchers brought a drilling platform out to sea and extracted a 30-meter-long sediment core from the bottom of the Great Blue Hole.



The analysis, carried out by researchers from the universities of Frankfurt, Cologne, Göttingen, Hamburg, and Bern, has given new insight into storm history and climate change in the southwestern Caribbean.



<h2 class="wp-block-heading" id="h-storm-record-written-in-sediment">Storm record written in sediment</h2>



Roughly 7,200 years ago, the limestone island that once held the Great Blue Hole was overtaken by the sea. Since then, layers of sediment have quietly accumulated at the bottom of the underwater cave.



These layers act like a natural time capsule, offering a window into 5,700 years of storm activity. Each layer records the passing of time, just as is found in <a href="https://www.earth.com/news/californias-weather-extremes-found-in-600-year-old-tree-rings/" target="_blank" rel="noreferrer noopener">tree rings</a>.



“Due to the unique environmental conditions – including oxygen-free bottom water and several stratified water layers – fine marine sediments could settle largely undisturbed in the Great Blue Hole,” said Dr. Dominik Schmitt, a researcher in the Biosedimentology Research Group at Goethe University Frankfurt.



“Inside the sediment core, they look a bit like tree rings, with the annual layers alternating in color between gray-green and light green depending on organic content.”



But not all layers are the same. Some are made up of coarser, lighter-colored particles. 



These event layers, called tempestites, formed when powerful waves from hurricanes and tropical storms swept coarse material from the atoll’s outer reef into the hole. 



“The tempestites stand out from the fair-weather gray-green sediments in terms of grain size, composition, and color, which ranges from beige to white,” Schmitt added.



<h2 class="wp-block-heading" id="h-long-term-climate-patterns">Long-term climate patterns </h2>



The team identified and dated 574 individual storm events that were preserved in the sediment core. This detailed storm record stretches far beyond the reach of written or instrumental history, which only covers about 175 years. 



The results offer a unique look into long-term climate patterns and <a href="https://www.earth.com/news/scientists-propose-adding-a-category-6-to-the-current-hurricane-intensity-scale/" target="_blank" rel="noreferrer noopener">hurricane</a> behavior in the region.



The data paints a clear picture: storm activity in the southwestern Caribbean has steadily risen over the past 6,000 years.



“A key factor has been the southward shift of the equatorial low-pressure zone. Known as the <a href="https://www.earth.com/news/tropical-rains-will-shift-northward-in-the-coming-decades/" target="_blank" rel="noreferrer noopener">Intertropical Convergence Zone</a>, this zone influences the location of major storm formation areas in the Atlantic and determines how tropical storms and hurricanes move and where they make landfall in the Caribbean,” Schmitt said.



The researchers also discovered a connection between sea surface temperatures and storm frequency. Warmer waters matched up with periods of increased storm activity. 



“These shorter-term fluctuations align with five distinct warm and cold climate periods, which also impacted water temperatures in the tropical Atlantic,” Schmitt noted.



<h2 class="wp-block-heading" id="h-a-warning-from-the-storm-record">A warning from the storm record</h2>



Historical averages suggest that the Great Blue Hole experienced between four and sixteen major storms per century. However, the sediment record shows that nine storms have already occurred in just the past 20 years.



“Our results suggest that some 45 tropical <a href="https://www.earth.com/news/record-heat-fueled-unexpected-and-deadly-storms-in-2023/" target="_blank" rel="noreferrer noopener">storms</a> and hurricanes could pass over this region in our century alone. This would far exceed the natural variability of the past millennia,” said Prof. Eberhard Gischler of Goethe University Frankfurt.



The team emphasizes that natural climate changes alone cannot explain this dramatic increase. Instead, they point to human-driven global warming. 



The rise in ocean temperatures and the growing strength of La Niña events are creating the perfect conditions for more frequent and more intense storms.



<h2 class="wp-block-heading" id="h-a-sediment-core-with-a-message">A sediment core with a message</h2>



The Great Blue Hole, once thought to be a quiet underwater marvel, is now telling a louder story - one of climate shifts and increasing storm risk.



As the sediment layers continue to build, so does the urgency to address the accelerating pace of extreme weather. 



This research reminds us that history, especially the kind written in mud and sand, still has much to teach us.



The full study was published in the journal <a href="https://www.science.org/doi/10.1126/sciadv.ads5624" target="_blank" rel="noreferrer noopener">Science Advances</a>.



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Sediment in the Great Blue Hole reveals an alarming storm record

In the heart of the Lighthouse Reef Atoll, off the...

A Deep-Sea Sponge and Anemones in Antarctica

An international team of researchers took advantage of a rare chance encounter to explore a massive new expanse of seafloor exposed by the breakup of an Antarctic ice shelf in the Bellingshausen Sea.&nbsp;



On January 13, 2025, an iceberg named A-84 - which was the size of the city of Chicago - broke off from the George VI Ice Shelf, which sits along the Antarctic Peninsula. 



This event uncovered roughly 209 square miles (540 square kilometers) of seafloor that had previously been concealed under floating ice.



The team arrived aboard <a href="https://schmidtocean.org/" target="_blank" rel="noreferrer noopener">Schmidt Ocean Institute</a>’s R/V Falkor (too) at this newly exposed site on January 25, making them the first to study such a large underwater area that had previously been covered by an ice shelf.&nbsp;



Their effort marks the first large-scale interdisciplinary exploration of geologic, oceanographic, and biological features hidden beneath an extensive floating <a href="https://www.earth.com/news/astonishing-glacier-retreat-in-the-arctic-signals-climate-disaster/" target="_blank" rel="noreferrer noopener">glacier</a> front.



<h2 class="wp-block-heading" id="h-rapidly-shifting-expedition-goals">Rapidly shifting expedition goals</h2>



Co-chief scientist Patricia Esquete is a researcher in the <a href="https://www.cesam-la.pt/en/" target="_blank" rel="noreferrer noopener">Center for Environmental and Marine Studies</a> (CESAM) and the Department of Biology (DBio) at the <a href="https://www.ua.pt/" target="_blank" rel="noreferrer noopener">University of Aveiro</a> in Portugal.&nbsp;



"We seized upon the moment, changed our expedition plan, and went for it so we could look at what was happening in the depths below,” said Esquete.



“We didn’t expect to find such a beautiful, thriving <a href="https://www.earth.com/news/how-environmental-stress-strengthens-ecosystems/" target="_blank" rel="noreferrer noopener">ecosystem</a>. Based on the size of the animals, the communities we observed have been there for decades, maybe even hundreds of years.”



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/Antarctic-iceberg-detached_seafloor-study_credit-SOI_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/Antarctic-iceberg-detached_seafloor-study_credit-SOI_1s.webp" alt="The newly exposed Antarctic seafloor also allowed the team to gather critical data on the past behavior of the ice sheet. The ice sheet has been shrinking and losing mass over the last few decades due to climate change. Credit: Alex Ingle / Schmidt Ocean Institute" class="wp-image-1963228"/></a><figcaption class="wp-element-caption">The newly exposed Antarctic seafloor also allowed the team to gather critical data on the past behavior of the ice sheet. The ice sheet has been shrinking and losing mass over the last few decades due to climate change. Credit: Alex Ingle / Schmidt Ocean Institute</figcaption></figure>



Originally, the science mission did not include venturing beneath a freshly fractured portion of the ice shelf. 



However, the movement of this newly calved <a href="https://www.earth.com/news/massive-iceberg-that-broke-away-from-antarctica-sparks-concerns/" target="_blank" rel="noreferrer noopener">iceberg</a> offered a rare opportunity to explore a site that, until recently, had never been examined by any human.



<h2 class="wp-block-heading" id="h-antarctic-seafloor-reveals-lush-communities">Antarctic seafloor reveals lush communities</h2>



Using Schmidt Ocean Institute’s remotely operated vehicle, ROV SuBastian, the science team spent eight days surveying the seafloor at depths down to 1,300 meters (4,265 feet).&nbsp;



The experts discovered an unexpectedly rich ecosystem that was teeming with corals, sponges, icefish, giant sea spiders, and <a href="https://www.earth.com/news/octopuses-could-dominate-earth-if-humans-vanish/" target="_blank" rel="noreferrer noopener">octopuses</a> - an indication that marine life can flourish under ice-covered regions of the Antarctic in ways not previously documented.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/Antarctic-iceberg-detached_seafloor_octopus-resting_credit-SOI_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/Antarctic-iceberg-detached_seafloor_octopus-resting_credit-SOI_1s.webp" alt="An octopus rests on the seafloor 1150 meters deep, in the Bellingshausen Sea off Antarctica, at an area where the shelf break and slope are cut by several underwater gullies. Credit: ROV SuBastian / Schmidt Ocean Institute" class="wp-image-1963224"/></a><figcaption class="wp-element-caption">An octopus rests on the seafloor 1150 meters deep, in the Bellingshausen Sea off Antarctica, at an area where the shelf break and slope are cut by several underwater gullies. Credit: ROV SuBastian / Schmidt Ocean Institute</figcaption></figure>



According to the researchers, these observations offer insight into how ecosystems function beneath the Antarctic ice sheet. Such an ecosystem has seldom been accessed. 



Earlier findings, notably by <a href="https://www.bas.ac.uk/" target="_blank" rel="noreferrer noopener">British Antarctic Survey</a> researchers in 2021, revealed possible bottom-dwelling life beneath ice, but the present study marks the first time an ROV survey has thoroughly documented wide areas of this vibrant seabed.



The experts were surprised by the large biomass and biodiversity in the ecosystem and suspect they have discovered several new species.



<h2 class="wp-block-heading" id="h-how-marine-life-survives-in-darkness">How marine life survives in darkness</h2>



Deep-sea ecosystems generally depend on nutrients trickling down from surface waters. However, these Antarctic seafloors had been buried under ice some 150 meters (nearly 500 feet) thick for centuries.&nbsp;



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/Antarctic-iceberg-detached_seafloor_Sponge_Anemone_credit-SOI_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/Antarctic-iceberg-detached_seafloor_Sponge_Anemone_credit-SOI_1s.webp" alt="A large sponge, a cluster of anemones, and other life is seen nearly 230 meters deep at an area of the seabed that was very recently covered by the George VI Ice Shelf, a floating glacier in Antarctica. Credit: Schmidt Ocean Institute" class="wp-image-1963226"/></a><figcaption class="wp-element-caption">A large sponge, a cluster of anemones, and other life is seen nearly 230 meters deep at an area of the seabed that was very recently covered by the George VI Ice Shelf, a floating glacier in Antarctica. Credit: Schmidt Ocean Institute</figcaption></figure>



With no direct sunlight, how such abundant organisms manage to feed is still uncertain. The scientists propose that ocean currents under the ice may be funneling essential nutrients to these communities.



<h2 class="wp-block-heading" id="h-antarctic-ice-sheet-behavior">Antarctic ice sheet behavior</h2>



Apart from their ecological discoveries, the international group - which included scientists from Portugal, the United Kingdom, Chile, Germany, Norway, New Zealand, and the United States - examined geological samples to gain knowledge about past changes in the Antarctic ice sheet.



The ice sheet has been shrinking and losing mass for decades in response to climate change.&nbsp;



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/Antarctic-iceberg-detached_modis-satellite-view_NASA_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/Antarctic-iceberg-detached_modis-satellite-view_NASA_1s.webp" alt="The MODIS Corrected Reflectance satellite imagery showing the iceberg calved from George VI Ice Shelf in the Bellingshausen Sea on 19 January 2025. Credit: Schmidt Ocean Institute" class="wp-image-1963222"/></a><figcaption class="wp-element-caption">The MODIS Corrected Reflectance satellite imagery showing the iceberg calved from George VI Ice Shelf in the Bellingshausen Sea on 19 January 2025. Credit: Schmidt Ocean Institute</figcaption></figure>



“The ice loss from the Antarctic Ice Sheet is a major contributor to sea level rise worldwide,” said co-chief scientist Sasha Montelli of <a href="https://www.ucl.ac.uk/" target="_blank" rel="noreferrer noopener">University College London</a>, who is also a 2019 Schmidt Science Fellow.&nbsp;



“Our work is critical for providing longer-term context of these recent changes, improving our ability to make projections of future change - projections that can inform actionable policies. We will undoubtedly make new discoveries as we continue to analyze this vital data.”



<h2 class="wp-block-heading" id="h-samples-from-the-antarctic-seafloor">Samples from the Antarctic seafloor </h2>



During this mission, the team collected both biological and geological samples. 



In addition, they deployed autonomous underwater vehicles, called gliders, to analyze how meltwater from the ice shelf impacts the region’s physical and chemical properties. 



Preliminary measurements hinted at high biological productivity and strong meltwater flow from the George VI ice shelf, providing further context for how such deep-sea populations may thrive in these surroundings.



<h2 class="wp-block-heading" id="h-part-of-a-larger-global-initiative">Part of a larger global initiative</h2>



The expedition is part of Challenger 150, a global cooperative dedicated to deep-sea biological study, and recognized by the Intergovernmental Oceanographic Commission of UNESCO (<a href="https://www.ioc.unesco.org/en" target="_blank" rel="noreferrer noopener">IOC/UNESCO</a>) as an Ocean Decade Action. 



This alignment ensures that findings from the George VI Ice Shelf breakage feed into broader international efforts to understand and safeguard <a href="https://www.earth.com/news/climate-change-is-impacting-marine-life-more-than-we-realized/" target="_blank" rel="noreferrer noopener">marine life</a>.



“The science team was originally in this remote region to study the seafloor and ecosystem at the interface between ice and sea,” noted Schmidt Ocean Institute’s executive director, Jyotika Virmani.&nbsp;



“Being right there when this iceberg calved from the ice shelf presented a rare scientific opportunity. Serendipitous moments are part of the excitement of research at sea - they offer the chance to be the first to witness the untouched beauty of our world.”



Looking ahead, the researchers plan to continue analyzing the collected data for insights into both ice sheet behavior and the unique marine life that has flourished unseen for centuries beneath the ice.&nbsp;



With accelerating climate change, the study’s findings about species adaptability and the resilience of Antarctic habitats carry implications for future conservation and policy decisions on a global scale.



<a href="https://schmidtocean.photoshelter.com/galleries/C0000QszlkoaNkKU/G0000p4LRtGEAfWo/I0000X_S5KjUr4QU/FKt250110-20250126-IceScanningCollectionAndIcebergViewing-Ingle-0202-jpg" target="_blank" rel="noreferrer noopener">See more of the photos taken on this mission by the Schmidt Ocean Institute here...</a>



Images Credit: Schmidt Ocean Institute



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Iceberg break from Antarctica reveals seafloor full of rare and vibrant ocean creatures

An international team of researchers took advantage of a rare...

Dogs can’t speak, but they express themselves clearly through body language. A bark, a tail wag, or a growl can reveal their feelings, but to understand them better, we must learn to interpret their silent cues.



"Understanding our dogs' basic body language allows us to gain insight into their thoughts and feelings about the world around them and what they are experiencing," said Harmony Diers, a veterinary technician and project manager for the Dog Aging Project at the Texas A&amp;M <a href="https://vetmed.tamu.edu" target="_blank" rel="noreferrer noopener">College of Veterinary Medicine</a> and Biomedical Sciences.



Diers explains how common behaviors can help us understand what our <a href="https://www.earth.com/news/national-puppy-day-2025-where-happiness-meets-responsibility/" target="_blank" rel="noreferrer noopener">dogs</a> are trying to communicate.



<h2 class="wp-block-heading" id="h-signs-of-a-relaxed-dog">Signs of a relaxed dog</h2>



Relaxed <a href="https://www.earth.com/news/how-dogs-feel-smells-may-help-keep-us-safe/" target="_blank" rel="noreferrer noopener">dogs</a> show it with their entire body. Their ears may lean forward or rest gently backward. Sometimes, submissive dogs fold their ears back, but the overall signal is calmness.



One clear sign of happiness is a circular tail wag. If your dog moves its tail in a loop, that shows true joy.



You may also notice soft, squinting eyes, a steady and kind gaze, leaning against you, lying down peacefully, rolling over for belly rubs, or panting with a slightly open mouth.



"It is important to recognize a calm and content <a href="https://www.earth.com/news/petting-a-dog-might-be-the-easiest-way-to-reduce-stress/" target="_blank" rel="noreferrer noopener">dog</a>'s body language to determine whether he or she is comfortable with the current environment and circumstances," Diers explained.



Understanding these signs helps you support your dog without overwhelming it or ignoring its comfort.



<h2 class="wp-block-heading" id="h-when-dogs-want-distance">When dogs want distance</h2>



Not all body language signals comfort. Discontented <a href="https://www.earth.com/news/from-wolves-to-dogs-did-domestication-begin-without-human-help/" target="_blank" rel="noreferrer noopener">dogs</a> often try to create space when feeling stressed.



A tucked tail usually indicates fear. A dog on high alert might raise its tail and wag it quickly, signaling tension rather than joy.



"A dog experiencing an uncomfortable situation may also turn his body away from the threat to present his back," Diers said.



Dogs sometimes shake their entire bodies after a stressful moment, similar to drying off after a bath. This helps them release built-up tension.



Ears held straight up can show readiness for action, while ears pinned close to the head show nervousness or submission. 



If your <a href="https://www.earth.com/news/humans-and-dogs-share-genes-linked-to-obesity/" target="_blank" rel="noreferrer noopener">dog</a> stares intensely or shows the whites of its eyes - often called the "whale eye" - it may be feeling scared or trapped. Tension in the mouth, pulled lips, licking, or yawning can all be signs of stress.



Learning these signals helps protect your dog and others, especially when meeting unfamiliar dogs or entering new spaces.



<h2 class="wp-block-heading" id="h-body-language-varies-by-breed">Body language varies by breed</h2>



Some breeds naturally appear alert, even when relaxed. Recognizing your dog’s baseline posture is important.



"When these dogs are in alert mode or feel threatened, the tail may go higher and stiffer and wag quickly," Diers said. For instance, German shepherds often have upright ears by nature. Huskies and malamutes usually carry curled tails, even when relaxed.



"Look at our pugs. They always have big open eyes, but if a wide-eyed pug is giving the whale eye, he may be experiencing a threat or feeling nervous."



Knowing your dog’s unique structure will help you tell the difference between comfort and caution.



<h2 class="wp-block-heading" id="h-illness-can-alter-body-language">Illness can alter body language</h2>



Body language doesn’t only reflect emotion. It can also signal health issues.



"An ill dog may sleep more, be grumpier and not want the normal interaction he usually gets excited about," Diers said.



A dog in pain might limp, lower its head, keep its posture stiff, tuck its belly inward, or arch its back. Whimpering may also occur. Lip-smacking could mean nausea or nervousness.



If your lively dog suddenly isolates, eats less, or shows no interest in play, something might be wrong.



"Ultimately, if your normally active and happy dog starts to isolate and show lethargy and/or decreased appetite, this is a sign that something has changed with their overall health, and seeking the care of a veterinarian is a suggested course to take," stressed Diers.



Paying attention to your dog’s body language strengthens your relationship. You build trust when you listen to their unspoken signals. Understanding what they say without words keeps them safe, happy, and healthy - and brings you even closer.



Information supplied by <a href="https://phys.org/partners/texas-a-m-university/">Texas A&amp;M University</a>.



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Want to know how your dog is feeling? Learn their body language

Dogs can’t speak, but they express themselves clearly through body...

Latimeria,Fish,Isolated,On,The,Black,Background

Among the many wonders and ancient tales about marine life and ocean creatures, one fish long believed to have vanished from our planet captured worldwide attention. 



This interest emerged from an unexpected finding that changed our perspective on what might still be lurking in the deep.



Before 1938, experts spoke of the coelacanth as a classic example of an extinct fish dating back more than 400 million years. Scholars concluded it had disappeared 65 to 70 million years ago. 



This assumption crumbled when a 32-year-old museum employee in East London, South Africa, examined a strange specimen brought by a local fisherman near the Chalumna River. The fish defied every existing category she knew.



Soon after, she contacted <a href="https://en.wikipedia.org/wiki/J._L._B._Smith" target="_blank" rel="noreferrer noopener">Professor James Leonard Brierley Smith</a> of <a href="https://www.ru.ac.za/" target="_blank" rel="noreferrer noopener">Rhodes University</a> for advice. He confirmed that the fish was indeed a living coelacanth. 



That surprise discovery shifted the zoological narrative and demonstrated how the fossil record can be incomplete, especially when only a small number of individuals survive.



<h2 class="wp-block-heading" id="h-fascinating-fish-tale">Fascinating fish tale</h2>



In the eyes of many scientists, the coelacanth’s resurgence placed it into what is called a Lazarus taxon. The term refers to creatures that vanish from evidence, then reappear without warning. 



One telling moment from that occasion remains the telegram from Brierley Smith: “MOST IMPORTANT PRESERVE SKELETON AND GILLS = FISH DESCRIBED.” 



No one anticipated those words, yet they confirmed something rare had surfaced.



After that event, more than a decade passed before another coelacanth turned up. In 1952, two fishermen in the Comoro Islands accidentally netted the second specimen, prompting renewed fascination among marine researchers. 



A further revelation followed in the 1990s, when experts identified a second species around the Indonesian archipelago. 



These examples carry the names <a href="https://www.earth.com/news/asian-megacities-at-highest-risk-from-sea-level-rise/" target="_blank" rel="noreferrer noopener">West Indian Ocean</a> coelacanth (Latimeria chalumnae) and Indonesian coelacanth (Latimeria menadoensis).



<h2 class="wp-block-heading" id="h-coelacanth-has-unique-physical-traits">Coelacanth has unique physical traits</h2>



This fish stands apart for its lobed pectoral fins, which appear to be an early link to vertebrates that eventually ventured onto land. These fins move in a synchronized pattern, allowing the fish to navigate underwater terrains. 



Unlike many other fishes, it also bears an unusual hinge in its skull, once a subject of speculation about how it might bite or process food.



Its coloration often blends with the rocky surroundings where it resides, offering a measure of cover in deep marine environments. 



The habitat provides sufficient shelter from predators, while the species’ low metabolism helps it survive on fewer resources. 



Scientists note that it rests in lava-cave recesses during daylight hours, an approach that likely shields it from hazards in open water.



<h2 class="wp-block-heading" id="h-ancestral-ties-to-land-creatures">Ancestral ties to land creatures</h2>



Researchers classify the coelacanth under the <a href="https://www.earth.com/news/mysterious-fish-like-fossil-finally-classified/" target="_blank" rel="noreferrer noopener">group Sarcopterygii</a>, or lobe-finned fishes, which include lungfish and the earliest ancestors of amphibians, reptiles, and mammals. 



Shared skeletal features, such as sturdy fin bones, point to a closer relationship with organisms that adapted to life on land. 



This connection is intriguing because it shows how certain aquatic traits can mirror structures later found in creatures roaming dry terrain.



Some studies suggest that the coelacanth’s rostral organ, located in its snout, may sense electrical signals from prey. 



That adaptation is reminiscent of strategies seen in other <a href="https://www.earth.com/news/coelacanth-ngamugawi-wirngarri-new-species-living-fossil-fish-survived-over-400-million-years/" target="_blank" rel="noreferrer noopener">lobe-finned fish</a>, hinting at a link between modern species and those that made their way onto shore millions of years ago. 



Observers note that this hidden ability emphasizes how an ancient design can remain effective.



<h2 class="wp-block-heading" id="h-geological-stability-has-helped-coelacanths">Geological stability has helped coelacanths</h2>



The ancient environment of undersea caverns has changed little over vast stretches of time. 



Because of this stable setting, the coelacanth has not faced the intense pressures that other species might encounter in rapidly shifting habitats. 



Food sources may be limited, but the fish’s slow pace lessens its caloric needs.



Its specialized niche also guards it from fierce competition. Other oceanic predators seldom patrol these dark, quiet zones, giving the coelacanth space to endure without altering the basic features that first appeared centuries ago. 



This alignment between organism and setting reveals a powerful strategy: remain where the external world barely intrudes.



<h2 class="wp-block-heading" id="h-inspiring-story-of-adaptation-and-survival">Inspiring story of adaptation and survival</h2>



Many living forms adapt constantly to survive. By contrast, this fish’s story underscores how a creature can persist if external demands remain light and internal physiology fits the available conditions. 



Though it caused surprise among zoologists, the coelacanth itself quietly continued in an environment well-suited to its capabilities.



To many observers, it sparks discussions on biodiversity and the surprising ways life endures. While others might call it a relic, it is very much a survivor. 



Each sighting encourages experts to keep watching the deep sea, a region that may hold additional beings we once wrote off as extinct.



Scientists continue to investigate whether this fish harbors undiscovered traits. Each observation can add to our understanding of marine evolution. 



Observers hope that further study might shed new light on adaptations that remain hidden in dark, remote corners of the ocean.



The full study was published in the journal <a href="https://www.nature.com/articles/s41598-023-37849-9" target="_blank" rel="noreferrer noopener">Scientific Reports</a>.



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World’s oldest fish was presumed extinct for 60 million years before being rediscovered

Among the many wonders and ancient tales about marine life...

The past is full of hidden secrets, and fossils offer valuable glimpses into ancient worlds. Each discovery reveals new insights into evolution, extinction, and the environmental shifts that shaped life long ago.



A recent study on a 30,000-year-old vulture fossil from Central Italy has revealed an extraordinary process of preservation. 



The researchers discovered that volcanic rock can capture microscopic details of feathers - a phenomenon that has never been documented before.



Fossilization usually occurs in sediments like mud or sand, where minerals replace organic materials over time. 



However, the vulture <a href="https://www.earth.com/news/organic-molecules-collagen-discovered-in-66-million-year-old-dinosaur-bones/" target="_blank" rel="noreferrer noopener">fossil</a> challenges conventional beliefs by showing how volcanic deposits can preserve soft tissues in stunning detail.



<h2 class="wp-block-heading" id="h-30-000-year-old-vulture-fossil">30,000-year-old vulture fossil</h2>



The fossilized vulture was discovered in 1889 near Rome by a local landowner. Its exceptional state of preservation made it a rare find at the time.



Unlike many <a href="https://www.earth.com/news/triassic-fossils-shed-new-light-on-ancient-ecosystems/" target="_blank" rel="noreferrer noopener">fossils</a> that are flattened by geological pressure, this specimen retained a three-dimensional structure. Even features like eyelids and wing feathers remained intact.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/vulture-fossil-feather_volcanic-rock_credit-Edoardo-Terranova_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/vulture-fossil-feather_volcanic-rock_credit-Edoardo-Terranova_1s.webp" alt="A Fossilized feather preserved with the volcanic rock. Credit: Edoardo Terranova" class="wp-image-1963155"/></a><figcaption class="wp-element-caption">A Fossilized feather preserved with the volcanic rock. Credit: Edoardo Terranova</figcaption></figure>



Despite its discovery more than a century ago, the fossil has continued to fascinate researchers. Recent advances in microscopic and chemical analysis provided scientists with tools to examine it anew, this time in unprecedented detail.



The findings have opened new doors in the study of fossilization and volcanic environments.



<h2 class="wp-block-heading" id="h-feathers-preserved-at-the-microscopic-level">Feathers preserved at the microscopic level</h2>



Dr. Valentina Rossi from University College Cork led the research team that conducted a detailed examination of the vulture fossil. 



The results, published recently in Geology, reveal that the feathers are preserved down to the microscopic level.



“Fossil feathers are usually preserved in ancient mudrocks laid down in lakes or lagoons,” noted Dr. Rossi.



“The fossil vulture is preserved in ash deposits, which is extremely unusual. When analyzing the <a href="https://www.earth.com/news/neanderthal-fossils-reveal-signs-of-a-population-collapse/" target="_blank" rel="noreferrer noopener">fossil</a> vulture plumage, we found ourselves in uncharted territory. These feathers are nothing like what we usually see in other fossils.”



Traditional fossilization often occurs in water-rich environments, where sediments gradually cover an animal’s remains. 



However, the vulture’s feathers survived in volcanic ash - a setting not previously recognized for preserving such delicate structures.



This raises new questions about the role of volcanic environments in <a href="https://www.earth.com/news/fossil-discovery-anadoluvius-turkae-suggests-humans-originated-in-europe-not-africa/" target="_blank" rel="noreferrer noopener">fossil</a> preservation.



<h2 class="wp-block-heading" id="h-role-of-zeolite-in-preservation">Role of zeolite in preservation</h2>



By analyzing tiny samples of the fossil feathers using electron microscopes and chemical tests, the researchers uncovered an unexpected preservation mechanism. 



The feathers were found to be encased in zeolite, a mineral composed of silicon and aluminum.



“Zeolites are minerals rich in silicon and aluminum and are common in volcanic and hydrothermal geological settings," Dr. Rossi explained.



"They can form as primary minerals (with pretty crystals) or can form secondarily, during the natural alteration of volcanic glass and ash, giving the rock a ‘mudrock-like’ aspect."



The team determined that water flowing through the ash layers triggered chemical changes that led to the formation of zeolite nanocrystals. These crystals replicated the feathers’ microscopic details, thus preserving them at a cellular level.



This process had never been reported before in soft tissue fossilization, making the vulture fossil a groundbreaking discovery.



<h2 class="wp-block-heading" id="h-preserved-soft-tissues-in-a-vulture-fossil">Preserved soft tissues in a vulture fossil</h2>



Volcanic activity is usually associated with destruction, not <a href="https://www.earth.com/news/where-did-dinosaurs-come-from-missing-fossils-hold-the-secret/" target="_blank" rel="noreferrer noopener">preservation</a>. Pyroclastic flows, known for their extreme heat and rapid movement, often obliterate organic material. 



Yet, this study demonstrates that, under certain conditions, volcanic ash can encase and protect soft tissues.



“We are used to thinking that volcanic deposits are associated with hot, fast-moving pyroclastic currents that will destroy soft tissues," noted Professor Dawid A. Iurino from the University of Milan.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/vulture-fossil-feather_volcanic-rock_illustration_credit-Dawid-Iurino_1big.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/vulture-fossil-feather_volcanic-rock_illustration_credit-Dawid-Iurino_1s.webp" alt="'The Doom of the Alban Hills' a digital painting representing a possible scenario of the moments before the vulture carcass was entombed in the pyroclastic current. Credit: Dawid A. Iurino" class="wp-image-1963158"/></a><figcaption class="wp-element-caption">'The Doom of the Alban Hills' a digital painting representing a possible scenario of the moments before the vulture carcass was entombed in the pyroclastic current. Credit: Dawid A. Iurino</figcaption></figure>



"However, these geological settings are complex and can include low temperature deposits that can preserve soft tissues at the cellular level.” 



This discovery challenges the assumption that volcanic environments are unsuitable for preserving fossils. 



It suggests that low-temperature ash deposits can serve as protective enclosures for biological remains, and that this may allow scientists to study ancient creatures in ways never before possible.



<h2 class="wp-block-heading" id="h-expanding-the-search-for-fossils">Expanding the search for fossils </h2>



The findings have significant implications for paleontology. Scientists have long focused on sedimentary rocks when searching for well-preserved fossils, and may have overlooked volcanic deposits. This research suggests that volcanic rock may hold a hidden wealth of fossils with preserved soft tissues.



“The fossil record is continually surprising us, be it new fossil species, strange new body shapes, or in this case, new styles of fossil preservation. We never expected to find delicate tissues such as feathers preserved in a volcanic rock," stated Professor Maria McNamara from University College Cork.



"Discoveries such as these broaden the range of potential rock types where we can find fossils, even those preserving fragile soft tissues."



This revelation encourages researchers to revisit volcanic fossil sites with fresh eyes. It also raises the possibility that more fossils with soft tissue preservation are waiting to be uncovered in ash-rich environments.



<h2 class="wp-block-heading" id="h-a-new-chapter-in-paleontology">A new chapter in paleontology</h2>



Scientific discoveries constantly reshape our understanding of the past. 



The vulture fossil provides a glimpse into an ancient world and introduces a previously unknown pathway of fossilization. 



Its preservation within volcanic rock suggests that nature’s processes are sometimes more complex than previously thought.



As researchers continue to explore this phenomenon, future studies may uncover additional cases of soft tissue preservation in volcanic deposits. 



This could revolutionize the study of fossils and expand the possibilities for finding well-preserved specimens in unexpected places.



The study is published in the journal <a href="https://pubs.geoscienceworld.org/gsa/geology/article-abstract/doi/10.1130/G52971.1/653118/Fossil-feathers-from-the-Colli-Albani-volcanic?redirectedFrom=fulltext" target="_blank" rel="noreferrer noopener">Geology</a>.



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Vulture fossil reveals that volcanic rock can preserve feathers

The past is full of hidden secrets, and fossils offer...

Many spiders of the species Tegenaria pagana live in caves with limited vision, while others inhabit brighter areas.



This variation has drawn scientists to examine how genes guide the development of vision in Tegenaria pagana, including Dr. Efrat Gavish-Regev of The National Natural History Collections at <a href="https://www.studyinjerusalem.com/?utm_source=google&amp;utm_medium=cpc&amp;utm_campaign=US+ALO+Google+Search&amp;utm_content=Brand&amp;gad_source=1&amp;gclid=Cj0KCQjw4v6-BhDuARIsALprm330hDnhqhFoZdY_lS4PrH3Yg7CCnccG1xA3LYYjkgHiQcLx06llPK0aAtQ3EALw_wcB" target="_blank" rel="noreferrer noopener">The Hebrew University of Jerusalem</a>.



<h2 class="wp-block-heading" id="h-how-cave-life-affects-spider-vision">How cave life affects spider vision</h2>



Organisms in dark environments often lose some or all of their eyesight. Some, like blind fish or amphibians, compensate with heightened senses, a theme that also surfaces among <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2570642/" target="_blank" rel="noreferrer noopener">subterranean spiders</a>.



Scientists are intrigued by <a href="https://www.inaturalist.org/taxa/264001-Tegenaria-pagana" target="_blank" rel="noreferrer noopener">Tegenaria pagana</a> because different populations display varying degrees of eye size. This makes it a helpful model for those who want to uncover the gene interactions that prompt vision changes.



<h2 class="wp-block-heading" id="h-gene-expression-and-eye-formation">Gene expression and eye formation </h2>



Eye development follows a genetic blueprint known as the <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC5830122/" target="_blank" rel="noreferrer noopener">retinal determination network</a>. In arthropods, this set of genes can activate when cells are instructed to form visual structures.



By comparing Tegenaria pagana with more typical spiders, researchers learn how shifts in gene expression affect eye formation. One crucial discovery is the <a href="https://www.sdbonline.org/sites/fly/neural/sineocul.htm" target="_blank" rel="noreferrer noopener">sine oculis gene</a>, which they say remains vital for <a href="https://www.earth.com/news/sydney-funnel-web-new-giant-species-of-worlds-most-dangerous-spider-identified/" target="_blank" rel="noreferrer noopener">spider</a> eyesight.



The <a href="https://link.springer.com/article/10.1186/s13227-025-00238-6" target="_blank" rel="noreferrer noopener">team</a> used fluorescence staining and confocal microscopy to track growth from fertilization to hatching. They noticed that even minor changes in embryonic timing can shift how eyes and other organs develop.



Different <a href="https://www.earth.com/news/save-a-spider-day-protecting-our-connection-with-nature/" target="_blank" rel="noreferrer noopener">spider</a> species sometimes form their body segments at varying speeds. The researchers saw that Tegenaria pagana embryos progress in unique ways, suggesting evolution can tweak shared patterns.



<h2 class="wp-block-heading" id="h-cave-species-reveal-shifts-in-vision">Cave species reveal shifts in vision</h2>



Studies on cave spiders add fresh insights to our understanding of underground habitats. Predators like Tegenaria pagana can reveal how animals cope with darkness and scarce food resources.



Some relatives of Tegenaria pagana show partial or total eye reduction, creating a range of vision abilities within the same genus. 



Researchers suggest that comparing these differences could clarify the step-by-step process that leads to eye loss.



<h2 class="wp-block-heading" id="h-how-spiders-trade-vision-for-senses">How spiders trade vision for senses</h2>



One focus of this <a href="https://link.springer.com/article/10.1186/s13227-025-00238-6" target="_blank" rel="noreferrer noopener">study</a> involved scanning a suite of genes for signs of activity in forming eyes. Each gene has a job, and if one is missing, the spider’s vision may never fully develop.



Scientists note that several <a href="https://www.earth.com/news/rethinking-arachnid-evolution-the-surprising-history-of-spiders/" target="_blank" rel="noreferrer noopener">genes</a> contribute to shaping optical tissues. This offers a clue to why some cave spiders can still see to some extent while others become blind.



<h2 class="wp-block-heading" id="h-adapting-to-life-in-darkness">Adapting to life in darkness</h2>



Reduced vision can open opportunities for enhanced contact-sensitive hairs, odor detection, or other senses. Many cave dwellers prove that what is lost in one sense often appears elsewhere.



Such trade-offs draw evolutionary biologists to cave systems worldwide. Tegenaria pagana adds a spider’s perspective to these discussions, highlighting how genes adapt in areas where light is absent.



“This research provides an essential reference for understanding how developmental and <a href="https://www.earth.com/news/slingshot-spiders-listen-for-the-right-moment-to-launch-their-webs/" target="_blank" rel="noreferrer noopener">genetic factors</a> influence eye formation in spiders.” said Dr. Gavish-Regev.



She emphasized that several Tegenaria species in Israel have assorted vision traits. This variety lets researchers gauge how gene interactions shift in response to environments with little to no light.



<h2 class="wp-block-heading" id="h-future-research-directions">Future research directions</h2>



The next research steps might involve tracking similar genes in spiders that have fully lost their eyes. Tests on <a href="https://www.researchgate.net/figure/List-of-troglomorphic-troglobitic-species-recorded-in-the-sampled-caves-in-the-Brazilian_tbl1_283984196" target="_blank" rel="noreferrer noopener">troglomorphic species</a> could lead to deeper insights into how certain genes shut down or reroute.



Findings from Tegenaria pagana may even relate to vision changes in <a href="https://www.researchgate.net/profile/Gregor-Aljancic-2/publication/269463496_Biology_and_functional_morphology_of_Proteus_anguinus_Amphibia_Caudata/links/548c45060cf2d1800d7dc089/Biology-and-functional-morphology-of-Proteus-anguinus-Amphibia-Caudata.pdf" target="_blank" rel="noreferrer noopener">other cave life</a>, such as crustaceans or amphibians that shed visual capacity over time.



The search for parallels across distant groups intrigues biologists who want to see if evolution follows similar scripts.



<h2 class="wp-block-heading" id="h-dramatic-shifts-in-subterranean-spiders">Dramatic shifts in subterranean spiders</h2>



Lab-raised populations of Tegenaria pagana promise a clearer picture of how vision genes behave during each developmental stage. Eggs collected at different intervals let scientists catch gene signals before any tissue forms.



Future research could test if genetic tweaks at early phases can produce permanent vision defects. If so, we might begin to link gene events to the dramatic shifts seen in subterranean spiders.



<h2 class="wp-block-heading" id="h-small-gene-changes-affect-vision">Small gene changes affect vision</h2>



Tegenaria pagana shows that minor changes in genes can have major effects on sight. These cave spiders add new angles to old questions about how organisms negotiate harsh, light-free habitats.



Experts plan to examine related species with fewer or missing eyes to see if the same genes come into play. This could clarify whether vision reduction follows similar routes in various caves.



Insights from Tegenaria pagana may guide future pest control strategies in human structures. By grasping how vision genes shift, we might refine ways to manage <a href="https://www.earth.com/news/some-spiders-outsmart-predators-imitating-mimicking-ants/" target="_blank" rel="noreferrer noopener">spiders</a> that thrive in dark corners.



Cave exploration groups can also benefit from this line of research, as understanding spider adaptations can provide insights into ecosystem health. If these spiders fail to maintain normal development, it might signal shifts in subterranean environments.



The study is published in the journal <a href="https://www.researchgate.net/profile/Gregor-Aljancic-2/publication/269463496_Biology_and_functional_morphology_of_Proteus_anguinus_Amphibia_Caudata/links/548c45060cf2d1800d7dc089/Biology-and-functional-morphology-of-Proteus-anguinus-Amphibia-Caudata.pdf" target="_blank" rel="noreferrer noopener">EvoDevo</a>.



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Spiders reveal how cave creatures lose their vision over time

Many spiders of the species Tegenaria pagana live in caves...

There’s something timeless about the way a puppy looks at you. Wide eyes, wagging tail, a little clumsy in its steps - that kind of innocence tugs at the heart. Puppies don’t ask for much, yet they give everything. They trust without question, love without conditions, and fill silence with soft breathing and happy barks. That’s why every year, on March 23, we celebrate National Puppy Day.



But while this day showers attention on wagging tails and floppy ears, it also carries a deeper purpose - one of compassion, <a href="https://www.earth.com/news/pandemic-puppy-owners-report-challenges-but-remain-committed/" target="_blank" rel="noreferrer noopener">awareness</a>, and responsibility.



<h2 class="wp-block-heading" id="h-purpose-of-national-puppy-day">Purpose of National Puppy Day</h2>



1National Puppy Day began in 2006, thanks to <a href="https://www.colleenpaige.com" target="_blank" rel="noreferrer noopener">Colleen Paige</a>, an animal behaviorist and author. Her goal wasn’t just to fill the world with cute puppy pictures. She established this day to spotlight the rising concerns around puppy mills and animal homelessness.



With millions of puppies born into poor conditions every year, the world needed a day that reminded people to adopt, not shop.



Colleen Paige wanted the public to understand that many dogs in shelters wait for homes while puppies are bred for profit in overcrowded and inhumane facilities. Puppy mills often keep mother dogs in cages with barely enough space to turn around. 



These mothers are bred repeatedly until they are too old or sick, at which point they are discarded. Puppies from these mills often suffer from health problems due to poor breeding practices and lack of medical care.



National Puppy Day isn't just a feel-good moment. It’s a social movement wrapped in soft fur and bright eyes. By choosing to adopt from shelters instead of buying from pet stores or online breeders, people can disrupt this cycle of cruelty. 



Paige’s initiative has since gained worldwide recognition, sparking conversations about animal rights and <a href="https://www.earth.com/news/many-people-experience-puppy-blues-with-a-new-pet/" target="_blank" rel="noreferrer noopener">responsible pet care</a>.



<h2 class="wp-block-heading" id="h-the-puppy-mill-problem">The puppy mill problem</h2>



Puppy mills are not rare. In the United States alone, there are an estimated 10,000 of these commercial breeding facilities. These mills collectively produce over 2 million <a href="https://www.earth.com/news/petting-a-dog-might-be-the-easiest-way-to-reduce-stress/" target="_blank" rel="noreferrer noopener">puppies</a> each year, many of which end up in pet shops or are sold online.



Meanwhile, nearly the same number of dogs are euthanized annually in overcrowded shelters. This staggering contrast reveals a harsh truth - there is no shortage of dogs in need of homes, only a shortage of awareness.



Puppy mills focus on quantity, not quality. Dogs are often kept in wire cages without proper bedding, food, or medical care. Their emotional needs are ignored. 



Mothers give birth repeatedly without rest, their bodies weakening over time. Puppies raised in these conditions may look healthy but often carry long-term health and behavioral issues.



By adopting, potential pet owners help break the cycle. Adoption gives homeless dogs a second chance and reduces the demand for mass breeding. National Puppy Day calls on people to educate themselves, their families, and their communities about the potentially cruel conditions in which many puppies are bred.



Change begins with knowing the truth, and this day is about more than just cuddles - it’s about making informed, <a href="https://www.earth.com/news/dogs-suffer-from-the-january-blues-just-like-humans/" target="_blank" rel="noreferrer noopener">compassionate choices</a>.



<h2 class="wp-block-heading" id="h-make-national-puppy-day-count">Make National Puppy Day count</h2>



March 23 should be more than just a day to post photos. It should be a moment of reflection, kindness, and action. People can celebrate by visiting local shelters, spending time with the animals, and learning more about how they can help. 



Shelters often use this day to host special events, encouraging community members to meet adoptable puppies and learn about rescue work.



Even if adopting isn’t an option right now, there are other ways to support the cause. Volunteering time, donating supplies, or simply sharing information online can help shelters find loving homes for their animals. 



Raising awareness within your own network can lead to more adoptions, better understanding, and stronger support systems for animals in need.



For those with pets already, National Puppy Day is a lovely excuse to give them extra attention. A longer walk, a new toy, or a few more minutes of playtime can mean the world to a <a href="https://www.earth.com/news/how-dogs-feel-smells-may-help-keep-us-safe/" target="_blank" rel="noreferrer noopener">puppy</a>. These small moments remind us why dogs are considered to be man’s best friend.



They bring loyalty, joy, and a kind of companionship that’s hard to find elsewhere.



<h2 class="wp-block-heading" id="h-puppy-facts-that-brighten-the-day">Puppy facts that brighten the day</h2>



Puppies may be young, but they have fascinating quirks that make them even more lovable. Most puppies sleep between 15 and 20 hours a day. This sleep fuels their rapid growth and development.



Dalmatians, known for their spots, are actually born without any. Their signature markings develop as they grow older. In rare cases, light-haired puppies are born with a green tint from a pigment in the womb - a color that fades within a few days.



The smallest adult dog ever recorded was just 3.8 inches (9.6 centimeters) tall. On the other end of the scale is the famous floral sculpture in Bilbao, Spain - a forty-foot-tall (12 meter) puppy covered in tens of thousands of fresh flowers.



<h2 class="wp-block-heading" id="h-a-day-to-celebrate-and-reflect">A day to celebrate and reflect</h2>



National Puppy Day 2025 is more than a celebration of cuteness. It’s a reminder that love comes with responsibility. 



Puppies are not toys. They are living beings who need time, patience, and care. Dogs deserve safe homes, not cages. They deserve kindness, not neglect.



Whether you have a dog, want one, or just love seeing them in your feed, March 23 is a day to pause and consider how we treat animals in general, and how we can do better.



So this year, take a moment to celebrate the joy of puppies. But also take a step toward change. Visit a shelter. Share a story. Adopt if you’re ready. Speak up when you see cruelty. Because behind every happy bark is a chance to build a more compassionate world. 



And every puppy, no matter where it starts, deserves that chance.



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National Puppy Day 2025: Where happiness meets responsibility

There’s something timeless about the way a puppy looks at...

Feathers did not arrive in nature as fully formed tools for flight. Their development began long before birds took to the sky. The fossil record tells a story that stretches back over 200 million years.



Now, with the help of genetic tools and carefully timed experiments, scientists can reawaken ancient traits inside of modern embryos.



This is not just about feathers. It's about how complexity arises, how it endures, and how biology protects the structures it builds. By reversing certain steps in feather <a href="https://www.earth.com/news/from-dinosaurs-to-birds-the-mysterious-origin-of-feathers/" target="_blank" rel="noreferrer noopener">development</a>, researchers reveal a hidden resilience. 



<h2 class="wp-block-heading" id="h-feather-development-before-birds">Feather development before birds</h2>



The earliest feathers didn’t help animals fly. Instead, they started as simple, hollow filaments. These "proto-feathers" likely emerged in some dinosaurs during the Triassic period, around 200 million years ago. 



There’s even evidence they may have evolved earlier, in a common ancestor of dinosaurs and pterosaurs nearly 240 million years ago.



Unlike modern feathers, proto-feathers had no central shaft, no branching barbs, and no follicle. But they still served a purpose. They helped with insulation and may have acted as colorful or patterned signals during social interaction. 



Over time, <a href="https://www.earth.com/news/bird-evolution-timeline-pushed-back-20-million-years-by-baminornis-zhenghensis-discovery/" target="_blank" rel="noreferrer noopener">natural selection</a> shaped feathers into complex tools that now support everything from flight to waterproofing.



This progression - from basic filaments to branched, aerodynamic feathers - didn’t happen randomly. It followed a path written in genes, using signaling pathways shared across the animal kingdom.



<h2 class="wp-block-heading" id="h-clues-hidden-in-bird-embryos">Clues hidden in bird embryos</h2>



Modern bird embryos offer a way to retrace this path. At the <a href="https://www.unige.ch/en/" target="_blank" rel="noreferrer noopener">University of Geneva</a>, Professor Michel Milinkovitch and his team have explored the genetics of feather formation. Their lab focuses on how molecular signals drive the development of skin structures like scales, hair, and feathers.



One such signaling system, the Sonic Hedgehog (Shh) pathway, plays a crucial role in shaping feathers. In earlier studies, the team activated this pathway in chicken embryos. 



The result was remarkable - scales on the feet of the birds transformed into permanent feathers. That experiment proved how a single shift in signaling can alter skin identity.



But what would happen if the Shh pathway were blocked instead?



"Feathers, ancient and intricate, still hold secrets that science is just beginning to unlock," noted Rory Cooper, lead author of the study.



<h2 class="wp-block-heading" id="h-ancient-feather-development-recreated">Ancient feather development recreated</h2>



To investigate, the researchers injected a drug called sonidegib into <a href="https://www.earth.com/news/bird-wings-inspire-improvements-in-airplane-safety/" target="_blank" rel="noreferrer noopener">chicken</a> embryos on their ninth day of development.



This drug shuts down the Shh pathway by targeting a key protein called Smoothened. The timing was crucial - day nine is when feather placodes begin to form, marking the start of feather bud development.



The results were dramatic. Feather buds failed to grow and remained short and unbranched. The typical invagination that forms a feather follicle was absent. Instead, the skin developed smooth, hollow filaments - almost identical to proto-feathers seen in fossils.



This temporary block in development held until the fourteenth day. After that, something unexpected happened. Feather growth resumed on its own. Chicks that hatched had patches of bare skin, but over the next several weeks, those areas filled in with normal feathers.



<h2 class="wp-block-heading" id="h-a-closer-look-at-how-feathers-recover">A closer look at how feathers recover</h2>



The researchers tracked development from embryo to hatchling using imaging and RNA sequencing. They confirmed that the Shh pathway was indeed suppressed. 



Key genes like Ptch1, Ptch2, and Gli1 were all turned down. These genes normally guide outgrowth, branching, and follicle formation. Blocking them prevented barbs and ridges from forming.



Microscopy revealed that in high-dose treatments, feather buds remained fused, stubby, and lacked branching. 



Follicle invagination - the folding-in of the skin to support feather roots - was completely absent. But despite all this, the system rebounded. By 49 days after hatching, the chicks showed normal feather coverage.



The only part that didn’t return to normal? The flight feathers. These specialized feathers, located on the posterior edge of the wing, failed to form correctly in high-dose embryos. 



Even weeks later, their positions were filled by smaller, contour-type <a href="https://www.earth.com/news/how-and-why-tropical-birds-are-so-strikingly-colorful-and-iridescent/" target="_blank" rel="noreferrer noopener">feathers</a>. This indicated that some aspects of feather identity are locked to narrow developmental windows.



<h2 class="wp-block-heading" id="h-timing-is-everything">Timing is everything</h2>



To verify that the observed effects were specific to Shh signaling, the team ran a second experiment. They combined the Shh-blocking drug with a Shh activator known as SAG. If feathers could be restored this way, it would confirm that both molecules act directly on the same pathway.



And they were. Chicks treated with both sonidegib and SAG developed normal feathers. Even when SAG was delivered one or two days after sonidegib, the feathers grew, branched, and invaginated as they should. 



Only late treatment - beyond day eleven - led to partial recovery. This showed that timing is everything in embryonic development.



"Our experiments show that while a transient disturbance in the development of foot scales can permanently turn them into feathers, it is much harder to permanently disrupt feather development itself," noted Michel Milinkovitch.



<h2 class="wp-block-heading" id="h-feathers-recover-scales-do-not">Feathers recover, scales do not</h2>



This recovery points to something fundamental about feathers. They grow from follicles that contain stem cells. These cells regenerate feathers cyclically throughout a bird’s life. 



In contrast, scales - like those on a bird’s foot - do not grow from follicles and cannot regenerate. That may explain why transformed foot scales remain feathers, while disrupted feathers bounce back.



Even at the gene expression level, this distinction is clear. After sonidegib treatment, the feathers showed temporary suppression of hundreds of genes tied to structure and shape - keratin production, signaling gradients, and branching formation. 



But the spatial map of feather follicles remained intact. Once signaling returned, so did the feathers.



Flight feathers, however, rely on precise placement and signaling levels during a short developmental window. If Shh signaling is missing at that moment, the opportunity is lost. The feather becomes ordinary, not aerodynamic.



<h2 class="wp-block-heading" id="h-ancient-mechanisms-modern-precision">Ancient mechanisms, modern precision</h2>



The entire experiment rests on a principle called reaction-diffusion. It’s a model that explains how patterns like stripes, spots, and ridges form in living tissues. 



The Shh protein works as an activator, while another molecule, Bmp2, acts as its inhibitor. Together, they create a spatial map that tells cells where to grow barbs, shafts, or follicles.



By altering the Shh signal, scientists rewrote this map. The result: broad stripes of gene activity replaced the usual dotted pattern of feather placodes. This type of disruption aligns with theories on how feathers evolved from simpler, unbranched structures. 



Proto-feathers didn’t have a patterned map yet - just the beginnings of one.



<h2 class="wp-block-heading" id="h-feather-development-and-evolution">Feather development and evolution</h2>



The study does more than recreate an ancient structure. It shows that feather development is built to recover from disruption. 



This makes sense from an evolutionary point of view. Feathers are essential to survival in many bird species. Evolution may have shaped them to resist failure - much like a city has backup systems to keep it running.



And yet, these systems remain open to change. By manipulating just one pathway, scientists can trigger a full shift in identity - from scale to feather. Or they can recreate traits that vanished millions of years ago.



It’s a reminder that the genetic blueprint of life is both sturdy and flexible. The key lies not in the parts themselves, but in the timing and tuning of their signals. Feathers evolved through such changes - and continue to teach us how form and function intertwine across deep time.



The study is published in the journal <a href="https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3003061" target="_blank" rel="noreferrer noopener">PLOS Biology</a>.



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Chicken embryos reveal secrets of early feather development

Feathers did not arrive in nature as fully formed tools...

Young,Golden,Retriever,For,A,Walk,With,His,Owner.,Dog

Stress can be exhausting, making even simple tasks feel like a chore. College life piles on exams and assignments, leaving many people feeling overwhelmed. A new study shows that playing with a <a href="https://www.earth.com/news/rewards-of-dog-ownership-outweigh-the-challenges/" target="_blank" rel="noreferrer noopener">friendly dog</a> for just 15 minutes can lighten that emotional load.



The research was led by senior investigator Dr. Jaruwan Khonmee from <a href="https://www.cmu.ac.th/" target="_blank" rel="noreferrer noopener">Chiang Mai University</a> in Thailand and included 122 students.



<h2 class="wp-block-heading" id="h-how-dogs-bond-with-humans-the-basics">How dogs bond with humans - the basics</h2>



There’s something incredibly special about the bond between dogs and humans - it goes way beyond companionship. 



Dogs don’t just live alongside us; they tune into our moods, read our body language, and somehow just get us. 



They know when we’re happy, when we’re stressed, when we need a nudge to go outside or a quiet moment to breathe. And we respond in kind. 



We learn to understand their barks, their tail wags, their little quirks. It’s not just loyalty - it’s this deep, wordless connection built on trust, time, and a whole lot of shared experiences.



<h2 class="wp-block-heading" id="h-dogs-help-lower-stress">Dogs help lower stress</h2>



<a href="https://archive.org/details/psychologicalstr0000laza" target="_blank" rel="noreferrer noopener">Stress</a> is a feeling of mental tension triggered by tough situations, and it can drain your energy before you realize it. Over time, stress can harm your mood, focus, and physical health in multiple ways.



College students often juggle challenging courses, part-time work, and new social circles. When responsibilities pile up, anxiety can creep in and catch people off guard.



<a href="https://pubmed.ncbi.nlm.nih.gov/2485862/" target="_blank" rel="noreferrer noopener">Cortisol</a> is a hormone that climbs when you’re tense and goes down when you’re relaxed. Lowering it can support better heart function and clearer thinking under pressure.



That’s where a quick session of <a href="https://www.earth.com/news/dog-breed-does-not-define-performance-and-ability/" target="_blank" rel="noreferrer noopener">canine interaction</a> steps in to break the cycle. A wagging tail or a nudge from a friendly snout can act like a natural mood lifter.



<h2 class="wp-block-heading" id="h-how-dogs-helped-students">How dogs helped students</h2>



In this project, students had their heart rates, saliva samples, and stress surveys measured before and after interacting with dogs. 



The researchers observed significant drops in both physical and emotional stress markers once the session ended.



Compared to just moments earlier, students’ self-reported <a href="https://www.earth.com/news/dogs-suffer-from-the-january-blues-just-like-humans/" target="_blank" rel="noreferrer noopener">stress levels</a> decreased by 33.5% after hanging out with the pup. This quick drop demonstrates how a little interaction can go a long way.



Some participants chose to cuddle or chat with the dog, while others offered treats or toys. Even short bursts of play were enough to see a noticeable shift.



<h2 class="wp-block-heading" id="h-dogs-reduce-stress-levels">Dogs reduce stress levels</h2>



“Even brief interactions with dogs can significantly reduce stress levels among university undergraduate students,” concluded the researchers. 



They noted that stress hormones in the dogs themselves appeared to drop over time, suggesting shared benefits.



Fecal tests indicated that <a href="https://www.earth.com/news/humans-and-dogs-share-genes-linked-to-obesity/" target="_blank" rel="noreferrer noopener">pups</a> had lower cortisol a week after these sessions. This finding points to the possibility that dogs might also feel relaxed when spending time with attentive humans.



Crucially, none of the six dogs used were certified therapy animals. Their friendly nature alone seemed enough to help students.



<h2 class="wp-block-heading" id="h-stress-relief-through-genuine-connection">Stress relief through genuine connection </h2>



Researchers have spent years examining the human-animal bond. One <a href="https://www.tandfonline.com/doi/abs/10.2752/089279314X14072268687808" target="_blank" rel="noreferrer noopener">project</a> found that petting a calm dog cannot only slow heart rate but also quiet the mind.



A good-natured pup provides social interaction without the same judgment people fear in formal therapy settings. Students can feel understood without having to explain every feeling or worry.



These canine sessions may work in part because they tap into <a href="https://www.health.harvard.edu/blog/co-regulation-helping-children-and-teens-navigate-big-emotions-202404033030" target="_blank" rel="noreferrer noopener">emotional co-regulation</a>, where two living beings calm each other. It’s less about a clinical approach and more about genuine connection.



That sense of warmth can reassure students who hesitate to seek human counseling. A dog’s presence often feels comforting, making it easier to let go of anxious thoughts.



<h2 class="wp-block-heading" id="h-encouraging-outcomes-for-students">Encouraging outcomes for students</h2>



Not every campus has the resources to bring in certified therapy animals. This study shows that friendly, well-behaved pets might offer help even if they lack formal training.



Some universities have started hosting dog visits during final exams to give frazzled students a break. In many cases, just a few minutes can revive a tired mind.



Researchers stress the importance of ensuring dogs enjoy the interaction. Signs of anxiety or discomfort in pets could prevent the positive effects.



Preparing a calm environment, offering treats, and supervising the sessions can keep everyone happy. It’s a balancing act that respects both human and canine comfort.



<h2 class="wp-block-heading" id="h-managing-stress-with-dog-visits">Managing stress with dog visits</h2>



Experts want to know if repeated dog sessions can bring lasting improvements. Longer studies might track stress relief over entire semesters to see if the benefits accumulate.



Some researchers wonder if these visits spark additional gains, like boosted motivation or a steadier mindset. Others are curious whether multiple short sessions are better than one extended visit. 



Further studies are needed to determine the ideal balance for ongoing stress management.



College life is not about to slow down, but dog visits seem promising for easing at least some of the mental load. Quick, simple sessions can offer a breather when books and deadlines pile high.



These findings encourage schools and organizations to consider how a wagging tail might bring calm to busy people. 



The study is published in the journal <a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0318777" target="_blank" rel="noreferrer noopener">PLOS ONE</a>.



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Petting a dog is the easiest way to reduce stress without medication

Stress can be exhausting, making even simple tasks feel like...

Not all great hammerhead sharks are long-distance travelers. In fact, some prefer to stick close to home. 



Recent research focusing on sharks near Andros Island in the Bahamas has revealed that while some great hammerheads are known to migrate vast distances, others appear to settle down, likely because the local environment already meets their needs. 



This discovery could help improve conservation efforts for this critically <a href="https://www.earth.com/news/endangered-sharks-study-reveals-hidden-crisis-of-overfishing/" target="_blank" rel="noreferrer noopener">endangered</a> species.



The study was led by Tristan Lee Guttridge, director of <a href="https://www.savingtheblue.org/?srsltid=AfmBOopD-gfmsVvvpjjjgw_pZcwXw0DuEAkFdxsThf_tvfMhnr_N9qE-" target="_blank" rel="noreferrer noopener">Saving the Blue</a>, in collaboration with researchers supported by Discovery’s Shark Week.



The team focused their efforts on the Bahamas, especially around Andros Island, an area largely unexplored in terms of great hammerhead activity.



<h2 class="wp-block-heading" id="h-shark-tracking-in-the-bahamas">Shark tracking in the Bahamas </h2>



“When we started this study there was little to no information about great <a href="https://www.earth.com/news/discovery-hammerhead-sharks-hold-their-breath-to-stay-warm/" target="_blank" rel="noreferrer noopener">hammerheads</a> in the central Bahamas and no information about their habitat use at Andros, which has one of the largest fringing reefs in the world and arguably has the most pristine flats habitats in the wider Caribbean,” explained Guttridge. “We had no answers to simple questions like, what do these sharks eat?”



Until now, most shark tracking in the Bahamas focused on areas like Bimini, known for its seasonal shark visitors. However, the role of Andros Island in the sharks' life cycle remained a mystery. 



Scientists wanted to find out if the island served as a year-round habitat, a feeding ground, or even a potential mating site.



<h2 class="wp-block-heading" id="h-tagging-tracking-and-shark-science">Tagging, tracking, and shark science</h2>



Between March 2020 and June 2024, the team captured 22 great hammerhead sharks in locations that matched their known <a href="https://www.earth.com/news/top-marine-predators-may-suffer-massive-habitat-loss-by-2100/" target="_blank" rel="noreferrer noopener">habitat</a> preferences.



Using baited block rigs, they carefully caught the sharks, assessed their health, and recorded key data like sex and size. 



Muscle biopsies were taken for isotope analysis, and seven sharks were equipped with satellite trackers. Because great hammerheads are sensitive to stress, only the healthiest individuals were tagged.



The researchers didn’t rely on their captures alone. They also included opportunistic sightings, compiling a total of 78 shark encounters between 2018 and 2024. Most of these were large juveniles or adults.



Sightings spiked in January through March, with a second increase in June and July. Two of these sightings suggested recent mating, pointing to the island’s importance as a possible breeding ground.



Some sharks were even recaptured in the exact same areas years later, showing a surprising degree of site fidelity.



<h2 class="wp-block-heading" id="h-a-shark-s-preferred-neighborhood">A shark’s preferred neighborhood</h2>



The sharks didn’t use the island randomly. They favored eastern waters just off the northern and central coast of Andros, consistently returning to a relatively small 400-square-kilometer area. 



Other popular spots included edge habitats near steep reef drop-offs, where prey was abundant.



But if the sharks ventured too far south or past the northern tip of the island, they were more likely to keep moving. 



Those that left the Bahamas often traveled to the eastern United States, indicating a possible connection to the broader western Atlantic hammerhead population.



<h2 class="wp-block-heading" id="h-eating-habits-of-hammerhead-sharks">Eating habits of hammerhead sharks </h2>



Isotope analysis from the biopsies shed light on the sharks' eating habits. Barracudas and <a href="https://www.earth.com/news/climate-change-may-cause-stingrays-to-move-toward-danger/" target="_blank" rel="noreferrer noopener">stingrays</a> made up about two-thirds of the diet, with smaller sharks filling in the rest. 



However, dietary preferences varied between individuals. One shark, for instance, had a diet consisting almost entirely of silky sharks.



“Resource availability is a key driver of space use, but why don’t all of them stay if food is so abundant? We found evidence of individual variation in their diets, so deciding whether to stay or go might depend on what they feed on," said Guttridge.



“For other species, why or if migration has been linked to environmental conditions, body size, food availability, competition, and predation."



“Perhaps, like <a href="https://www.earth.com/news/young-salmon-outsmart-predators-on-their-journey-to-the-sea/" target="_blank" rel="noreferrer noopener">salmon</a>, there is a genetic component to it? We need to explore this phenomenon further.”



<h2 class="wp-block-heading" id="h-movement-patterns-of-hammerhead-sharks">Movement patterns of hammerhead sharks</h2>



Guttridge noted that the global population of great hammerheads is thought to have reduced by more than 80% over the last three generations, and genomic analysis revealed low genetic variation and inbreeding.



“Understanding the movement patterns of great hammerheads is important for improving conservation efforts. We find that some great hammerheads show residency in the Bahamas, protecting them year-round from fishing pressures.”



The Bahamas shark sanctuary offers protection to sharks that stay within its borders, but not all sharks remain in these waters. That means local conservation efforts alone aren't enough to protect the species.



“Our research showcases the importance of Bahamian waters and their protective measures. It also shows that although some individuals reside year-round in protected waters, others do not, emphasizing the need for international collaboration on conservation efforts for these mobile species," said Guttridge.



"A key next step is seeing how these hammerheads fit in with the broader north-west Atlantic population.”



Understanding who stays and who goes - and why - may be the key to keeping the species alive.



The full study was published in the journal <a href="https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2025.1544482/full" target="_blank" rel="noreferrer noopener">Frontiers in Marine Science</a>.



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Why some great hammerhead sharks rarely leave home

Not all great hammerhead sharks are long-distance travelers. In fact,...

Many people assume that cats are aloof and uncooperative. The results of a new study are challenging this assumption, suggesting that certain felines might be surprisingly effective in therapy and other animal-assisted services (<a href="https://aas-int.org/" target="_blank" rel="noreferrer noopener">AAS</a>).



Professor Patricia Pendry of <a href="https://wsu.edu/" target="_blank" rel="noreferrer noopener">Washington State University</a> collaborated with Belgian researchers to investigate whether some cats show consistent, friendly behavior in settings that help people cope with <a href="https://www.earth.com/news/stopping-alzheimers-before-it-starts-early-treatment-shows-potential/" target="_blank" rel="noreferrer noopener">stress</a> and anxiety.



The study was focused on how cat personality traits might fit into therapy programs, even though dogs have historically dominated this field.



<h2 class="wp-block-heading" id="h-potential-of-using-cats-in-therapy">Potential of using cats in therapy</h2>



Cat-based support programs have lagged in popularity in the United States. In some parts of Europe, however, professional teams have quietly introduced cats into schools, hospitals, and community centers, with positive anecdotal feedback.



<a href="https://pubmed.ncbi.nlm.nih.gov/22194067/" target="_blank" rel="noreferrer noopener">Researchers</a> have been digging into cat behavior for years to understand how these animals communicate with people. 



Cats form strong emotional bonds and may <a href="https://www.earth.com/news/new-therapy-for-childhood-brain-cancer-halts-tumor-formation/" target="_blank" rel="noreferrer noopener">sense</a> when someone is upset, giving them a unique way to offer comfort that differs from dogs.



<h2 class="wp-block-heading" id="h-unique-traits-that-soothe">Unique traits that soothe</h2>



Some therapy professionals report that cats can help clients feel less tense in stressful environments. These observations align with general <a href="https://pubmed.ncbi.nlm.nih.gov/24565951/" target="_blank" rel="noreferrer noopener">findings</a> that time spent with animals can lower heart rate and calm the nervous system.



Cats involved in certain AAS scenarios often display a gentle demeanor, especially when people are seated or in lower-energy <a href="https://www.earth.com/news/psilocybin-therapy-offers-hope-for-millions-with-depression/" target="_blank" rel="noreferrer noopener">moods</a>. 



Unlike many dogs, which may leap around or bark loudly, a calm cat can bring a sense of stillness that some individuals prefer.



<h2 class="wp-block-heading" id="h-screening-cats-for-therapy">Screening cats for therapy</h2>



“There’s this perception that cats just aren’t suitable for this kind of work, but our study shows that some cats may thrive in these settings,” said Pendry. 



Preliminary survey results from hundreds of Belgian cat owners revealed that specific felines show high sociability, enjoy contact with new people, and display patience when handled.



This openness may make a select group of cats better suited for therapy visits, especially when multiple clients move through a room each day. Not every cat wants this much <a href="https://www.earth.com/news/gut-health-may-be-the-key-to-anxiety-relief/" target="_blank" rel="noreferrer noopener">social interaction</a>, so experts emphasize the importance of screening and ongoing monitoring.



<h2 class="wp-block-heading" id="h-relieving-feelings-of-isolation">Relieving feelings of isolation </h2>



Therapy animals have been popular at universities, where students grapple with academic pressure and homesickness. While dogs still appear most often in the U.S., a few schools in Europe have experimented with cats to provide quieter, more low-key sessions.



Institutions that tested cat therapy sessions reported enthusiastic responses from students who already favored felines at home. Practitioners say a purring cat in someone’s lap can help relieve feelings of isolation, particularly if that person is more introverted.



<h2 class="wp-block-heading" id="h-welfare-of-therapy-cats">Welfare of therapy cats </h2>



<a href="https://www.mdpi.com/2076-2615/15/1/33">Studies</a> show that cats suitable for therapy may be tolerant of being picked up and transported. Researchers also note that some outgoing cats seem to handle bustling therapy spaces without hiding under tables or hissing.



This calm acceptance of new situations goes hand in hand with the animal’s own comfort level. Professionals warn that if a cat consistently appears tense, it’s better to remove them from the program for the sake of their well-being.



Even the best-suited cats can feel overwhelmed by long therapy <a href="https://www.earth.com/news/music-therapy-reduces-distress-in-people-with-dementia/" target="_blank" rel="noreferrer noopener">sessions</a> or large groups of people. More investigations are needed to explore the stress levels cats may experience during repeated interactions in different locations.



Caregivers and therapists often watch for signs of burnout in cats, such as excessive grooming or agitation. These signals can indicate that a break or a reduced workload is necessary, ensuring the cat remains comfortable.



<h2 class="wp-block-heading" id="h-not-all-felines-are-a-match">Not all felines are a match</h2>



Some cats are extremely social, while others are content to lounge alone at home. Advocates of cat therapy stress that the idea is not to force a reluctant cat into these roles but to let the more confident ones shine.



“It’s about recognizing that some cats may genuinely enjoy this kind of interaction,” said Pendry. She pointed out that certain outgoing felines have much in common with therapy dogs.



Professional trainers rarely work with cats in the same structured way they do with dogs. Many cats in AAS programs appear to bring their natural style of greeting, which may be enough when the cat is friendly and calm.



However, some experts think basic training could reduce fear and help cats become comfortable with unusual sounds or sudden movements. Simple exercises involving handling and social exposure might give prospective therapy cats a smoother transition into these roles.



<h2 class="wp-block-heading" id="h-the-appeal-of-quiet-companions">The appeal of quiet companions</h2>



Even in noisy environments like hospitals, a well-chosen cat can soothe patients who feel intimidated by hyperactive animals. This option might also support individuals who have had negative experiences with dogs and prefer a less boisterous companion.



Several cat breeds like <a href="https://cfa.org/breed/maine-coon-cat/" target="_blank" rel="noreferrer noopener">Maine Coons</a> and <a href="https://www.purina.co.uk/find-a-pet/cat-breeds/ragdoll" target="_blank" rel="noreferrer noopener">Ragdolls</a> are sometimes described as more tolerant of human contact, though the <a href="https://www.mdpi.com/2076-2615/15/1/33" target="_blank" rel="noreferrer noopener">study</a> did not focus on specific breeds. Researchers emphasize that individual personality matters more than general breed traits.



Belgian groups appear more open to cat-based therapies, while U.S. programs remain cautious. With growing evidence, some American facilities may soon broaden their horizons and incorporate felines for special sessions.



Pet welfare organizations suggest that expansions should be slow and monitored. Collecting data on cat temperament and stress responses will help refine best practices for feline involvement in therapy settings.



<h2 class="wp-block-heading" id="h-potential-growth-of-cat-therapy">Potential growth of cat therapy</h2>



Animal-assisted services can be beneficial for humans when done ethically. Cats offer a calmer approach for those who prefer their peaceful presence, which can be an ideal match in certain therapy contexts.



Nevertheless, it is vital to guard against pushing cats beyond their comfort zone. Programs that prioritize the cat’s autonomy and track their stress signals stand a better chance of a successful and humane experience.



As knowledge spreads, interested cat owners may look for ways to share their pets’ gentle nature with local organizations. Europe’s warmer reception could foreshadow gradual acceptance elsewhere, as more evidence supports feline therapy under the right conditions.



Focused research on cat well-being is a natural next step. Scientists are eager to pinpoint whether cats adapt to therapy work or whether personality traits drive success from the start.



The study is published in the journal <a href="https://www.mdpi.com/2076-2615/15/1/33" target="_blank" rel="noreferrer noopener">Animals</a>.



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Cats that like attention can soothe people during therapy

Many people assume that cats are aloof and uncooperative. The...

Many people know dogs have an amazing sense of smell. It helps them find lost hikers, sniff out contraband, and detect health issues. Their noses pick up odors we barely notice, offering an invisible map of the world around them.



Scientists have taken a closer look at this skill by scanning <a href="https://www.earth.com/news/dogs-can-smell-human-stress-and-it-makes-them-feel-gloomy/" target="_blank" rel="noreferrer noopener">canine brains</a> while they work their sniffing magic. The study was led by Professor Zeev Zalevsky from the Kofkin Faculty of Engineering at <a href="https://engineering.biu.ac.il/" target="_blank" rel="noreferrer noopener">Bar-Ilan University</a>. 



The researchers found key insights in the <a href="https://my.clevelandclinic.org/health/body/24894-amygdala" target="_blank" rel="noreferrer noopener">amygdala</a>, <a href="https://www.ncbi.nlm.nih.gov/books/NBK482171/" target="_blank" rel="noreferrer noopener">hippocampus</a>, and <a href="https://www.ncbi.nlm.nih.gov/books/NBK11158/" target="_blank" rel="noreferrer noopener">olfactory bulb</a> of four dog breeds, which shed light on how dogs separate one odor from another.



<h2 class="wp-block-heading" id="h-dogs-read-smells-with-their-brain">Dogs read smells with their brain</h2>



Dogs have a larger set of <a href="https://pmc.ncbi.nlm.nih.gov/articles/mid/NIHMS22337/" target="_blank" rel="noreferrer noopener">odor receptor genes</a> than humans, allowing them to detect scents in trace amounts. 



Their noses send signals to the olfactory bulb, where initial processing happens. Next, the signals reach deeper regions of the brain linked to memory, motivation, and emotion.



The research team used a remote optical sensor that could scan a dog’s brain activity while it took in four different smells. Experts say this approach might open the door for observing real-time <a href="https://www.earth.com/news/dogs-can-detect-scents-better-than-the-most-advanced-lab-tools/" target="_blank" rel="noreferrer noopener">canine</a> responses without bulky equipment.



<h2 class="wp-block-heading" id="h-why-the-amygdala-matters">Why the amygdala matters</h2>



“The findings show that the amygdala is crucial in the way dogs process and react to odors, with specific scents triggering distinct emotional and memory responses, and we are capable of optically detecting their brain activity in this region,” said Professor Zalevsky.&nbsp;



”This discovery could be the first step toward creating a device that enables us to better understand and interpret the unique way dogs perceive and differentiate smells.”



The amygdala is often associated with emotion and survival instincts. The researchers saw this region activate differently when the dogs sampled each odor, highlighting why some smells bring about strong behaviors.



<h2 class="wp-block-heading" id="h-tracking-the-smell-response-of-dogs">Tracking the smell response of dogs</h2>



“Our next step is to develop a portable, Wi-Fi-controlled device equipped with a mini camera and laser system, which could be mounted on a dog’s head and used to monitor its olfactory <a href="https://www.earth.com/news/trained-dogs-can-detect-bladder-cancer-in-other-dogs/" target="_blank" rel="noreferrer noopener">responses</a> in real time,” said Dr. Yafim Beiderman, an expert in Professor Zalevsky’s Optical Research Lab at Bar-Ilan University.



This technology could potentially transform how dogs are used in substance detection or medical diagnosis.



Some experts have looked at dogs for <a href="https://www.bmj.com/content/329/7468/712" target="_blank" rel="noreferrer noopener">cancer screening</a> and diabetes alerts. A deeper understanding of their scent processing could speed up these efforts, making it possible to gather data without waiting for canine training to finish.



<h2 class="wp-block-heading" id="h-scanning-from-a-distance">Scanning from a distance</h2>



Using lasers to pick up tiny vibrations on the surface of the skull may sound out of the ordinary. Yet <a href="https://www.sciencedirect.com/science/article/pii/S0263224123007145" target="_blank" rel="noreferrer noopener">studies</a> show that such non-invasive methods can sense blood flow and neural activity in humans. 



The researchers adapted that idea for dogs, focusing on specific brain zones where odor signals land.



Data from the sensor was processed by a machine-learning system, revealing that each area of the brain responded in unique ways. This led to the conclusion that the emotional center is a heavyweight in scent separation.



<h2 class="wp-block-heading" id="h-implications-for-health-and-safety">Implications for health and safety</h2>



Police often rely on K9 units to sniff out drugs and other illegal substances. A remote brain scanner might help them interpret the dog’s recognition of a target odor without confusion or guesswork. 



In medical fields, a quick read of a dog’s amygdala response may one day spot an illness before a patient notices symptoms.



Teams that conduct search-and-rescue missions also stand to gain. Any gadget that clarifies what a dog is smelling could guide them toward trapped individuals more efficiently.



<h2 class="wp-block-heading" id="h-a-shift-in-how-we-see-dogs">A shift in how we see dogs</h2>



The research emphasizes that dogs are more than <a href="https://www.earth.com/news/petting-a-dog-might-be-the-easiest-way-to-reduce-stress/" target="_blank" rel="noreferrer noopener">loyal companions</a>. Their noses have been described as sophisticated analyzers that monitor odors for emotion-based clues. 



Decoding those responses may add new dimensions to how people partner with animals in daily tasks.



A deeper look at the hippocampus in dogs may also reveal how memories of smells guide their actions. The research team noted that future studies could expand to more breeds and more scents, refining the technology along the way.



<h2 class="wp-block-heading" id="h-subtle-scent-triggers-from-a-dog-s-brain">Subtle scent triggers from a dog's brain</h2>



Some individuals rely on service dogs for anxiety or panic disorders. Interpreting real-time signals from the dog’s brain might uncover subtle scent triggers that a person hasn’t recognized. 



This concept extends to therapy animals, especially if professionals want to measure how dogs respond to stressful environments.



Researchers have found that dog noses can often detect changes in body chemistry, sometimes months or years before medical tests confirm a disease. Real-time tracking of this skill could produce a fast approach for problem detection, bridging the communication gap between species.



Scientists plan to explore broader ways to translate canine brainwaves into easy-to-read data. There might come a time when a single device reveals how dogs process everything from everyday household smells to suspicious substances. 



The study is published in the <a href="https://onlinelibrary.wiley.com/doi/10.1002/jbio.202400501" target="_blank" rel="noreferrer noopener">Journal of Biophotonics</a>.



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How dogs are able to "feel" smells may help keep us safe

Many people know dogs have an amazing sense of smell....

Imagine the world as if you are a krill in the Southern Ocean, where any moment a torpedo-shaped penguin could appear, devouring thousands of your fellow krill at lightning speed. Now, new research suggests that even the faintest hint of penguin droppings in the water is enough to prompt krill into escape behavior.



“Here we show for the first time that a small amount of penguin guano causes a sudden change in the feeding and swimming behaviors of <a href="https://www.earth.com/news/how-satellites-track-antarctic-krill-are-these-tiny-ocean-shrimp-in-danger/" target="_blank" rel="noreferrer noopener">Antarctic krill</a>,” said Nicole Hellessey, a postdoctoral researcher at the <a href="https://www.bigelow.org/" target="_blank" rel="noreferrer noopener">Bigelow Laboratory for Ocean Sciences</a> in Maine.



Antarctic krill play a vital role in the Southern Ocean. They serve as a major carbon sink and provide food for a large array of species, from penguins to whales. 



By some estimates, approximately 700 trillion adult Antarctic krill still swim these frigid waters, though their populations have drifted further south over time, likely due to climate change, diminishing sea ice, and acidifying ocean conditions.



<h2 class="wp-block-heading" id="h-linking-penguin-poop-to-krill-behavior">Linking penguin poop to krill behavior</h2>



<a href="https://www.earth.com/news/zooplankton-poop-can-be-used-to-store-carbon-in-the-deep-ocean/" target="_blank" rel="noreferrer noopener">Zooplankton</a> are highly sensitive to chemical cues - from signals guiding them to food or potential mates to indicators of pollution. Hellessey and her colleagues sought to determine whether krill also react to the scent of predators. 



Their study zeroed in on <a href="https://www.earth.com/news/adelie-penguins-use-sea-ice-to-migrate-thousands-of-miles-each-year/" target="_blank" rel="noreferrer noopener">Adélie penguins</a>, the southernmost-breeding penguin species, which depend on Antarctic krill for 99.6% of their diet. An adult Adélie can consume as much as 1.6 kilograms of krill each day, and the global Adélie population collectively devours around 1.5 million tons per year.



Researchers aboard the vessels Laurence M Gould and Nathaniel B Palmer in the Bransfield Strait in late 2022 netted live Antarctic krill, which they then placed in aquaria at Palmer Station. 



Meanwhile, bird researchers had collected 78 grams of Adélie guano from a colony on Torgersen Island off the Antarctic Peninsula near Palmer Station. “Smells like rotten shellfish. Not pleasant to handle,” said Hellessey, describing the guano.



<h2 class="wp-block-heading" id="h-abrupt-behavior-shifts-in-krill">Abrupt behavior shifts in krill</h2>



To test the krill’s reaction to the guano, the scientists ran trials using six to eight krill per five-minute session in a flume tank held at 1.5°C, with lights dimmed to simulate conditions at about 40 meters below the surface - the most productive layer in the <a href="https://www.earth.com/news/carbon-storage-mystery-emerges-in-the-southern-ocean/" target="_blank" rel="noreferrer noopener">Southern Ocean</a>. 



Water flowed through the flume at either 3 centimeters or 5.9 centimeters per second, and it contained either algae alone, penguin guano alone, or both combined. Each setup was tested four times.



The researchers used two automated cameras to record the movements of four krill during each trial, capturing precise data on each animal’s 3D position as well as speed and swimming direction.



The data revealed that in control settings, krill generally practiced “rheotaxis,” swimming straight upstream against the current. 



But in the presence of Adélie guano, their behavior shifted abruptly: they began to vary their swimming speed more, reaching between 1.2 and 1.5 times their usual pace, and they performed three times as many turns - over an angle that was on average 1.4 times greater than before.



<h2 class="wp-block-heading" id="h-krill-make-sacrifices-to-avoid-penguins">Krill make sacrifices to avoid penguins</h2>



A second experiment showed that guano in the water caused krill to reduce their algae consumption by 64%, plunging from 12.7 micrograms of carbon per hour per krill to 4.6 micrograms. 



This indicates that the frequent changes in swimming direction came at a cost, making them less efficient at feeding.



The researchers interpreted these dramatic differences in speed and direction as part of an avoidance response. 



“Such behavior to escape from nearby penguins would greatly increase the krill’s odds of survival. And these odds would increase exponentially in a swarm, if their neighbors could detect the same cues and communicate the danger to each other,” Hellessey said.



<h2 class="wp-block-heading" id="h-investigating-the-chemical-trigger">Investigating the chemical trigger</h2>



Though the team uncovered the behavioral shift, it is still unclear which specific compounds from penguin guano set off these alarms for krill.&nbsp;



“We hypothesize that Antarctic krill are avoiding the odor of ground-up krill and fish in the penguins’ guano. We thus expect krill to show similar swimming behaviors and suppressed feeding around seals, whales, and other types of krill predators in Antarctica,” Hellessey noted.



<h2 class="wp-block-heading" id="h-krill-signals-in-a-warming-ocean">Krill signals in a warming ocean</h2>



Given that these signals and their resulting behaviors occur in the often vast Southern Ocean, open-water conditions could dilute the cues and alter how krill respond. Moreover, warming oceans and acidification may alter how effectively these cues travel or how quickly the krill can respond.&nbsp;



“We don’t yet know how the ability of krill to sense these chemical cues and their escape behavior towards them might vary when diluted in open waters, or under global warming or ocean acidification conditions," said Hellessey. 



"Any changes to krill’s behavior could have major impacts on the future Southern Ocean, as Antarctic krill are a keystone species in this ecosystem."



<h2 class="wp-block-heading" id="h-predicting-broader-ecological-shifts">Predicting broader ecological shifts</h2>



Ultimately, this study adds an important layer to our knowledge of <a href="https://www.earth.com/news/danger-zones-climate-change-is-altering-predator-prey-dynamics/" target="_blank" rel="noreferrer noopener">predator-prey interactions</a> in polar waters. As climate shifts reshape the Southern Ocean, understanding how krill perceive and react to predator signals may help predict broader ecological shifts.&nbsp;



If krill alter their movements and feeding drastically, it could influence entire marine food webs and carbon cycling processes - a reminder that even simple chemical cues can produce outsized effects on oceanic ecosystems.



The study is published in the journal <a href="http://dx.doi.org/10.3389/fmars.2025.1508287" target="_blank" rel="noreferrer noopener">Frontiers in Marine Science</a>.



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Just a whiff of penguin poop can send krill into a frenzy

Imagine the world as if you are a krill in...

Human activity in the Galápagos Islands is quietly reshaping wildlife behavior. A new study published in the journal Animal Behaviour reveals that Galápagos yellow warblers (Setophaga petechia aureola) grow more aggressive in response to traffic noise. These <a href="https://www.earth.com/news/saving-americas-birds-scientists-declare-a-full-on-emergency-in-the-us/" target="_blank" rel="noreferrer noopener">birds</a>, found only on the islands, respond differently based on their proximity to roads.



​The study was led by researchers from <a href="https://www.aru.ac.uk/" target="_blank" rel="noreferrer noopener">Anglia Ruskin University</a> and the <a href="https://klf.univie.ac.at/" target="_blank" rel="noreferrer noopener">Konrad Lorenz Research Centre</a> at the University of Vienna. Using recorded bird songs and simulated traffic sounds, the team observed how warblers reacted in different territories.​



The results showed birds living near roads exhibited more aggression, while those farther away behaved more passively when exposed to the same noise.



<h2 class="wp-block-heading" id="h-growing-human-impact-on-islands">Growing human impact on islands</h2>



The Galápagos Islands lie over 500 miles off Ecuador’s coast. Once a quiet haven of biodiversity, the region now feels the strain of human presence. 



A rapid rise in population and tourism has increased the number of vehicles on roads. This shift transforms the once-isolated environment, bringing unexpected consequences for its native <a href="https://www.earth.com/news/birds-adapt-their-survival-strategies-to-climate-change/" target="_blank" rel="noreferrer noopener">wildlife</a>.



The Galápagos yellow warbler, a subspecies genetically distinct from its mainland relatives, serves as a biological indicator of this change. The researchers studied the birds on the islands of Floreana and Santa Cruz.



In both regions, vehicle noise prompted warblers to behave more aggressively, even on Floreana, where only around 10 vehicles are in use.



<h2 class="wp-block-heading" id="h-birds-change-their-songs-near-traffic">Birds change their songs near traffic</h2>



The scientists tested <a href="https://www.earth.com/news/birds-are-moving-north-and-breeding-earlier-in-a-changing-climate/" target="_blank" rel="noreferrer noopener">bird responses</a> by playing songs through a speaker, simulating a territorial intruder. Sometimes the sounds were paired with traffic noise. 



When this occurred near roads, birds became more aggressive - flying near the speaker and singing longer. In quieter areas, birds became less confrontational when noise accompanied the song.



This pattern suggests that long-term exposure matters. Warblers with more experience around noise adjusted their behavior in ways that could help maintain territorial control despite sound interference.



“Birds use song during territorial defense as an aggressive signal. However, if external noise such as traffic interferes with the signaling, effectively blocking this communication channel, increasing physical aggression would be an appropriate response,” noted Dr. Caglar Akcay, senior lecturer in behavioural ecology at Anglia Ruskin University.



The research suggests these birds are learning to adapt. Changes in song length and pitch help their calls rise above low-frequency traffic sounds. 



In all territories, birds raised the minimum frequency of their songs when traffic was present. This adjustment could improve their chances of being heard.



<h2 class="wp-block-heading" id="h-behavioral-flexibility-and-conservation">Behavioral flexibility and conservation</h2>



The findings shed light on the unexpected reach of human activity. Even in the Galápagos - long seen as a sanctuary for natural evolution - <a href="https://www.earth.com/news/birds-are-breathing-in-plastic-what-does-that-mean-for-us/" target="_blank" rel="noreferrer noopener">birds</a> now must compete with the noise of progress.



“Our results show that the change in aggressive responses in yellow warblers occurred mainly near roads. Birds occupying roadside territories on both islands, and therefore having regular experience of traffic noise, may have learned to increase physical aggression when the territorial intrusion was accompanied by traffic noise,” said Dr. Akcay.



Beyond aggression, warblers demonstrate flexibility. They tweak their songs to cut through the clamor. These subtle changes show nature’s resilience, but they also signal a need for reflection.



“Our study shows the importance of considering behavioral plasticity in conservation efforts and developing strategies to mitigate the effects of noise pollution on wildlife. It also highlights the significant impact of human activities on wildlife behavior, even in relatively remote locations such as the Galápagos Islands,” noted Dr. Akcay.



Understanding this behavioral flexibility may guide future conservation. It reminds us that protecting biodiversity requires more than preserving land - it demands attention to the noise we bring with us.



<h2 class="wp-block-heading" id="h-traffic-noise-changes-birds-behavior">Traffic noise changes birds’ behavior</h2>



This study urges conservationists and policymakers to look beyond visible damage. Roads, buildings, and pollution are easy to spot. Noise, on the other hand, slips in silently, altering <a href="https://www.earth.com/news/tropical-birds-can-handle-climate-variability/" target="_blank" rel="noreferrer noopener">ecosystems</a> in less obvious ways. 



Yet its effects are clear. For the Galápagos yellow warbler, this may mean adjusting song and behavior just to be heard and understood.



The warbler’s story is a quiet warning: the modern world reaches even the most distant corners. If we are to protect these natural wonders, we must consider not only what we build, but what we sound like as we do.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S0003347225000466" target="_blank" rel="noreferrer noopener">Animal Behaviour</a>.



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Some birds get 'road rage' when exposed to traffic noise

Human activity in the Galápagos Islands is quietly reshaping wildlife...

Modern birds are closely related to dinosaurs, as seen by comparing flightless species like chickens and ostriches, which walk on two hind legs, or predatory hawks and eagles with their keen senses and sharp talons, to small theropod dinosaurs.&nbsp;



Still, birds have diverged in crucial ways from their reptilian predecessors. One vital turning point was their development of larger brains, which spurred changes in skull size and shape.



Recent work by researchers at the <a href="https://www.uchicago.edu/en" target="_blank" rel="noreferrer noopener">University of Chicago</a> and the <a href="https://missouri.edu/" target="_blank" rel="noreferrer noopener">University of Missouri</a> demonstrates how these physical transformations affected how <a href="https://www.earth.com/news/saving-americas-birds-scientists-declare-a-full-on-emergency-in-the-us/" target="_blank" rel="noreferrer noopener">birds</a> move and utilize their beaks to eat and interact with the world - adaptations that helped them become one of the most diverse lineages on Earth.



<h2 class="wp-block-heading" id="h-complex-nature-of-a-wiggly-skull">Complex nature of a “wiggly” skull</h2>



Unlike many other animals, modern birds, along with certain snakes and fishes, have skulls whose jaws and palates are not firmly fixed in place.&nbsp;



Alec Wilken, a graduate student in integrative biology at the University of Chicago and lead author of this new study, calls this kind of flexible anatomy “wiggly.” He notes that such a trait complicates attempts to understand its function.&nbsp;



“Just because you have a joint there, that doesn’t mean that you know how it moves. So, you also have to think about how muscles are going to be pulling on the joint, what kind of torque they have, and how other joints in the head limit the mobility,” he explained.



<h2 class="wp-block-heading" id="h-investigating-how-bird-skulls-evolved">Investigating how bird skulls evolved</h2>



Wilken first became involved in this project in 2015 while studying at the University of Missouri. 



There, Casey Holliday, an associate professor of pathology and anatomical sciences, had received support from the <a href="https://www.nsf.gov/" target="_blank" rel="noreferrer noopener">National Science Foundation</a> (NSF) to investigate how bird skulls, jaw muscles, and feeding mechanics evolved from their <a href="https://www.earth.com/news/where-did-dinosaurs-come-from-missing-fossils-hold-the-secret/" target="_blank" rel="noreferrer noopener">dinosaur</a> lineage to modern birds.



Wilken contributed to the research by analyzing data from computer tomography (CT) scans of fossils and existing birds, as well as the skulls of other reptiles such as alligators. 



The gathered data then supported the creation of 3D models that track muscle positions, movements, and the physics of how they operate together.



<h2 class="wp-block-heading" id="h-advantages-of-modern-bird-skulls">Advantages of modern bird skulls</h2>



One distinctive feature of modern birds is referred to as “cranial kinesis,” which is the capacity to move different portions of the skull independently. This affords birds an evolutionary edge, letting them open or expand their palates and use their beaks in various ways.



“Having a wiggly head like this really gives them a lot of evolutionary benefits,” Wilken said. Parrots, for instance, employ their beaks to climb, while other birds break open tough seeds and nuts.&nbsp;



“In some ways, the beak functions like a surrogate hand, but being able to move the palate around while eating is also mission critical to helping them acquire food and survive.”



<h2 class="wp-block-heading" id="h-the-path-from-dinosaurs-to-birds">The path from dinosaurs to birds</h2>



From analyzing these 3D models, the scientists observed that as non-avian theropod dinosaurs developed increasingly larger brains and skulls, muscles shifted into arrangements that allowed for more mobile palates and jaws.&nbsp;



Consequently, these transformations increased muscle force and supported cranial kinesis in the majority of today’s birds.



“We see this cascade of changes that happened along the dinosaur to bird transition,” said Holliday. “A large part of it hinges upon when birds evolved a relatively large <a href="https://www.earth.com/news/bird-brain-study-will-shed-new-light-on-avian-intelligence/" target="_blank" rel="noreferrer noopener">brain</a>. Just like in humans, bigger brains drive a lot of changes in the skull.”



Over time, paleontological findings have shown that the line between dinosaurs and birds is considerably blurred, especially since many dinosaurs sported feathers and some were capable of flight.&nbsp;



However, the scientists noted that truly flexible skulls and palates appeared later than species such as Archaeopteryx, leading them to speculate that cranial kinesis may turn out to be a key factor distinguishing modern birds from more primitive dinosaur-like birds.



<h2 class="wp-block-heading" id="h-a-blueprint-for-future-understanding">A blueprint for future understanding</h2>



While it is well established that <a href="https://www.earth.com/news/study-reveals-secrets-of-the-evolution-of-prehistoric-reptiles/" target="_blank" rel="noreferrer noopener">prehistoric reptiles</a> gave rise to the birds we now see flying overhead, the genetic and mechanical steps along that journey remain a topic of intense investigation.&nbsp;



This latest research strengthens the idea that the interplay between a bigger brain and skull modifications allowed birds to free up their jaws and palates, leading to vast ecological success.



Ultimately, the improved skull flexibility and diversified feeding methods among birds mirror the complicated interplay of evolutionary pressures that have continued since the time of dinosaurs.&nbsp;



The new study represents only one step in unravelling how birds learned to harness their beaks’ capabilities, and how earlier dinosaur species formed the foundation for today’s avian biodiversity.



The study is published in the journal <a href="http://dx.doi.org/10.1073/pnas.2411138122" target="_blank" rel="noreferrer noopener">Proceedings of the National Academy of Sciences</a>.



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‘Wiggly’ skulls helped birds evolve from dinosaurs

Modern birds are closely related to dinosaurs, as seen by...

Scientists have identified a new fossil species of freshwater fish, Ferruaspis brocksi, from a site near Gulgong, in NSW, Australia.



This discovery, led by Dr. Matthew McCurry from the <a href="https://australian.museum" target="_blank" rel="noreferrer noopener">Australian Museum</a> and <a href="https://www.unsw.edu.au" target="_blank" rel="noreferrer noopener">UNSW Sydney</a>, provides a rare glimpse into Australia’s ancient aquatic life. 



The fossil, which is estimated to be 15 million years old, preserves both the fish's stomach contents and its color patterns. The Journal of Vertebrate Palaeontology has published the findings.



Ferruaspis brocksi belongs to the Osmeriformes order, which includes <a href="https://www.earth.com/news/ancient-fish-had-flexible-joints-like-humans/" target="_blank" rel="noreferrer noopener">species</a> like the Australian Grayling and Australian Smelt.



It is the first freshwater smelt fossil found in Australia. The species was named in honor of Professor Jochen J. Brocks from the <a href="https://www.anu.edu.au" target="_blank" rel="noreferrer noopener">Australian National University</a>, who contributed to fossil discoveries at McGraths Flat.



<h2 class="wp-block-heading" id="h-tracing-the-evolution-of-osmeriformes">Tracing the evolution of Osmeriformes</h2>



Dr. McCurry emphasized that before the discovery of this fossil, scientists lacked evidence to confirm when Osmeriformes first arrived in Australia.



“The discovery of the 15 million-year-old freshwater fish fossil offers us an unprecedented opportunity to understand Australia’s ancient ecosystems and the evolution of its fish species, specifically the Osmeriformes group during the Miocene epoch, 11-15 million years ago,” McCurry said.



Without fossils, researchers could not determine whether these fish had <a href="https://www.earth.com/news/tiktaalik-fossil-discovery-sheds-light-on-how-fish-walked-onto-land/" target="_blank" rel="noreferrer noopener">evolved</a> significantly over time. This new find provides crucial evidence for understanding how they adapted to ancient Australian waters.



<h2 class="wp-block-heading" id="h-what-did-the-fish-fossil-reveal">What did the fish fossil reveal?</h2>



The well-preserved fossil reveals fascinating details about the fish’s diet. The stomach contents show that it fed on various invertebrates, mainly small phantom midge larvae. 



This level of preservation is rare and helps scientists reconstruct past <a href="https://www.earth.com/news/plesiosaur-fossil-contains-soft-tissue-preserved-for-183-million-years/" target="_blank" rel="noreferrer noopener">ecosystems</a> with greater accuracy.



“One of the fossils even shows a parasite attached to the tail of the fish. It’s a juvenile freshwater mussel called a glochidium. These juvenile mussels attach themselves to the gills or tails of fish to hitch rides up and down streams,” McCurry added.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/fish_Ferruaspis-brocksi_fossil_stomach-contents_15-million-years-old_credit-Salthy-Dingo_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/fish_Ferruaspis_fossil_stomach-contents_15-million-years-old_credit-Salthy-Dingo_1s.webp" alt="A 15-million-year-old fish fossil, Ferruaspis brocksi, with preserved stomach contents. Credit: Salthy Dingo" class="wp-image-1962871"/></a><figcaption class="wp-element-caption">A 15-million-year-old fish fossil, Ferruaspis brocksi, with preserved stomach contents. Credit: Salthy Dingo</figcaption></figure>



The species’ name reflects its discovery in iron-rich rock. “Ferru” comes from the Latin word “ferrum,” meaning iron, while “brocksi” honors Professor Brocks.



<h2 class="wp-block-heading" id="h-honoring-a-scientific-contribution">Honoring a scientific contribution</h2>



Professor Brocks expressed excitement about having this fossil species named after him.



“Collecting fossils at McGrath Flat is a highlight for me every year. Splitting the rust-red slabs of rock is like opening an ancient book, revealing the creatures that inhabited an Australian oxbow lake some 15 million years ago," exclaimed Professor Brocks.



"This little fish is one of the most beautiful fossils there, and finding the first vertebrate among the abundant plant and insect fossils was a real surprise. Having F. brocksi named after me is a real joy.” 



The McGraths Flat fossil site continues to provide remarkable insights into prehistoric life, and contributes to a better understanding of Australia’s ecological past.



<h2 class="wp-block-heading" id="h-revealing-the-fish-s-coloration">Revealing the fish’s coloration</h2>



Dr. Michael Frese from the <a href="https://www.canberra.edu.au" target="_blank" rel="noreferrer noopener">University of Canberra</a> and <a href="https://www.csiro.au/en/" target="_blank" rel="noreferrer noopener">CSIRO</a> highlighted another exciting aspect of the research - the ability to determine the fish’s color pattern.



“The fish was darker on its dorsal surface, lighter in color on its belly and had two lateral stripes running along its side,” Dr. Frese said.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/03/fish_Ferruaspis-brocksi_fossil_illustration_15-million-years-old_credit-Alex-Boersma_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/03/fish_Ferruaspis-brocksi_fossil_illustration_15-million-years-old_credit-Alex-Boersma_1s.webp" alt="A school of Ferruaspis is chased by the extinct platypus, Obdurodon. Credit: Alex Boersma" class="wp-image-1962873"/></a><figcaption class="wp-element-caption">A school of Ferruaspis is chased by the extinct platypus, Obdurodon. Credit: Alex Boersma</figcaption></figure>



Using a powerful microscope, scientists identified melanosomes, which are tiny structures responsible for producing color. 



While melanosomes have helped reconstruct the colors of ancient feathers, this is the first time they have been used to determine the color pattern of a long-extinct fish.



<h2 class="wp-block-heading" id="h-site-of-exceptional-fossil-preservation">Site of exceptional fossil preservation</h2>



Professor Kris Helgen, Director and Chief Scientist at the Australian Museum Research Institute, praised the ongoing research at McGraths Flat.



“Dr. Matt McCurry’s work at the McGraths Flat fossil site has been outstanding. This is one of many discoveries made at this site, which continues to play a significant role in advancing our understanding of Australia’s evolution during the Miocene era.”



McGraths Flat is one of the rare fossil sites in Australia classified as a "Lagerstätte" - a site with exceptionally well-preserved fossils. 



Located in the Central Tablelands of NSW, it offers a unique window into an ancient rainforest ecosystem.



<h2 class="wp-block-heading" id="h-what-do-fish-fossils-reveal-about-ancient-australia">What do fish fossils reveal about ancient Australia?</h2>



Dr. McCurry explained that fossils from this site, dating back 11 to 16 million years, show that the region was once a temperate, wet rainforest teeming with life. 



These discoveries help scientists reconstruct ancient landscapes and understand the biodiversity of prehistoric Australia.



The initial McGraths Flat expedition in 2017 received funding from a descendant of Robert Etheridge, a renowned English palaeontologist who played a crucial role in developing the Australian Museum’s collections. 



Etheridge launched a series of scientific expeditions that continue today, ensuring that Australia’s rich fossil heritage remains a key focus for researchers.



The discovery of Ferruaspis brocksi is another milestone in understanding how <a href="https://www.earth.com/news/coelacanth-ngamugawi-wirngarri-new-species-living-fossil-fish-survived-over-400-million-years/" target="_blank" rel="noreferrer noopener">ancient species</a> thrived and adapted in Australia’s evolving landscapes.



The study is published in the <a href="https://www.tandfonline.com/doi/full/10.1080/02724634.2024.2445684" target="_blank" rel="noreferrer noopener">Journal of Vertebrate Paleontology</a>. 



Image Credit: Salthy Dingo



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Stomach contents preserved after 15 million years in fish fossil

Scientists have identified a new fossil species of freshwater fish,...

A new study has found that the H5N1 avian influenza virus is mutating to evade immune defenses in mammals following prior infection or vaccination.



The research, led by <a href="https://www.charlotte.edu/" target="_blank" rel="noreferrer noopener">UNC Charlotte</a>, emphasizes the growing threat of <a href="https://www.earth.com/news/efforts-to-control-bird-flu-are-not-working-are-humans-next/" target="_blank" rel="noreferrer noopener">H5N1</a> to both agriculture and public health.



“H5N1 can infect avian and mammalian livestock and jump to humans,” the authors wrote. highlighting that new strains appear increasingly resistant to existing antibodies. This evolution, they caution, suggests that older vaccine formulas may lose effectiveness.



“This study shows a trend of weakening binding affinity of existing antibodies against H5 isolates over time, indicating that the H5N1 virus is evolving immune escape from our therapeutic and immunological defenses,” noted the researchers.



<h2 class="wp-block-heading" id="h-rapid-shifts-in-bird-flu-virus">Rapid shifts in bird flu virus</h2>



By running large-scale computational models of specific viral proteins binding with neutralizing antibodies, the research team discovered “an overall worsening in <a href="https://www.earth.com/news/experts-have-found-powerful-antibodies-that-neutralize-all-covid-variants/" target="_blank" rel="noreferrer noopener">antibody</a> affinity to more recent H5N1 isolates.”&nbsp;



“If one makes an H5N1 vaccine with a previous vaccine candidate virus, the vaccine will have less efficacy, based on our measurements of how much the virus has evolved in recent years,” explained lead author Colby T. Ford, a visiting scholar at UNC Charlotte’s <a href="https://cipher.charlotte.edu/" target="_blank" rel="noreferrer noopener">Center for Computational Intelligence to Predict Health and Environmental Risks</a> (CIPHER).



Conducted under the guidance of assistant professor Richard Allen White III, and CIPHER co-director Daniel Janies, the UNC Charlotte team joined forces with <a href="https://web.mit.edu/" target="_blank" rel="noreferrer noopener">Massachusetts Institute of Technology</a> (MIT) researchers Rafael Jaimes III and Phillip J. Tomezsko to explore how the H5N1 virus is adapting so quickly.



<h2 class="wp-block-heading" id="h-mounting-zoonotic-risk">Mounting zoonotic risk</h2>



Analyzing 1,804 antigen-antibody interactions, the researchers examined how the virus’s hemagglutinin subunit changed from 1996 to 2018.&nbsp;



By applying high-performance computational techniques, they tracked the virus’s “antigenic drift” - small cumulative mutations that hamper the effectiveness of immune defenses from earlier infections or vaccines.



The new measurements of how much the bird flu virus has evolved in recent years confirmed that H5N1 is becoming less recognizable to established antibodies.



“These results indicate that the virus has potential to move from epidemic to pandemic status,” wrote the researchers.



<h2 class="wp-block-heading" id="h-emergence-across-multiple-species">Emergence across multiple species</h2>



Though H5N1 has primarily circulated in birds, it has jumped to <a href="https://www.earth.com/news/avian-influenza-h5n1-marine-mammals-spreading-worldwide/" target="_blank" rel="noreferrer noopener">mammals</a> and, rarely, to humans.&nbsp;



In the past year, the virus was found in dairy cattle in at least 17 U.S. states, and the <a href="https://www.cdc.gov/index.html" target="_blank" rel="noreferrer noopener">Centers for Disease Control and Prevention</a> (CDC) reported 70 human cases, including one fatality, in the United States since January 2022.&nbsp;



Worldwide, according to the <a href="https://www.who.int/" target="_blank" rel="noreferrer noopener">World Health Organization</a>, H5N1 has been linked to 466 human deaths since 2003.



Between January 2022 and March 2025, the CDC also documented 12,510 H5N1 outbreaks among wild birds within the U.S., virus detections in 51 jurisdictions and 166,417,923 affected poultry.



Such widespread, cross-species infections strongly indicate that avian influenza can be considered a pandemic among animal populations, raising fears of a future human pandemic.



<h2 class="wp-block-heading" id="h-birds-flu-vaccination-and-public-health">Birds flu vaccination and public health</h2>



In discussing how to avert the looming threat, the authors argue that a new approach to <a href="https://www.earth.com/news/universal-influenza-vaccine-could-offer-lifetime-immunity/">vaccine</a> development may be needed.&nbsp;



These findings indicate that once the bird flu virus modifies itself significantly, older vaccines will have less efficacy, making it essential to develop and regularly update H5N1 vaccines reflecting the virus’s continuous genetic changes.



Furthermore, the study’s results highlight the power of high-performance computing in mapping viral evolution. By integrating AI-based protein folding with physics-based simulations, researchers can anticipate changes in viral structure and better inform policy decisions.&nbsp;



<h2 class="wp-block-heading" id="h-bird-flu-s-potential-for-pandemic-status">Bird flu’s potential for pandemic status</h2>



With H5N1 already widespread among wild birds and expanding its foothold in mammalian hosts, the virus’s cross-species jumps present a significant concern.&nbsp;



According to the experts, more robust monitoring, updated vaccination strategies, and ongoing computational analyses will be crucial in mitigating a potential outbreak.&nbsp;



As Janies concluded, computational modeling can help experts “tune our intuition to the right approaches” for vaccine design and intervention strategies before a fast-adapting virus gains an uncontrollable edge.



The study is published in the journal <a href="https://dx.doi.org/10.1016/j.ebiom.2025.105632" target="_blank" rel="noreferrer noopener">eBioMedicine</a>.&nbsp;



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Bird flu virus is rapidly evolving to evade immune defenses

A new study has found that the H5N1 avian influenza...

Coral reefs face threats from many sources, but the crown-of-thorns starfish is often singled out for its ability to chomp through living coral at staggering rates.



<a href="https://scispace.com/pdf/the-acanthaster-phenomenon-1fnwsb66cy.pdf" target="_blank" rel="noreferrer noopener">Scientists</a> have puzzled over this starfish’s boom-and-bust population cycles, which can leave once-colorful coral communities in serious trouble.



Crown-of-thorns starfish numbers can spike quickly, damaging reefs from Australia to other parts of the Indo-Pacific. 



Previous explanations have focused on shifting ocean conditions or lack of predators, yet a recent <a href="https://www.pnas.org/doi/10.1073/pnas.2424560122" target="_blank" rel="noreferrer noopener">study</a> highlights a surprising group that appears to gobble up young starfish before they mature.



<h2 class="wp-block-heading" id="h-small-crabs-help-control-starfish-numbers">Small crabs help control starfish numbers</h2>



“Using our newly developed eDNA techniques to detect COTS, we found COTS DNA in the guts of seven species of decapod caught across more than 1,000 km of the Great Barrier Reef. Plus we found fewer crabs in areas prone to COTS outbreaks,” said study senior author Dr. Sven Uthicke from the <a href="https://www.aims.gov.au/" target="_blank" rel="noreferrer noopener">Australian Institute of Marine Science</a>. 



Some <a href="https://www.earth.com/news/breaks-in-ancient-coral-growth-reveal-earths-climate-past/" target="_blank" rel="noreferrer noopener">reefs</a> seem to carry pockets of these small <a href="https://www.britannica.com/animal/decapod" target="_blank" rel="noreferrer noopener">decapod creatures</a>, which are ten-legged crustaceans that often lurk in cracks and under rubble. 



The researchers found that their absence in certain spots matched places where starfish outbreaks flared up.



<h2 class="wp-block-heading" id="h-crabs-eat-young-starfish">Crabs eat young starfish </h2>



“Consuming <a href="https://www.gbrbiology.com/2022/05/26/juvenile-crown-of-thorns-starfish/" target="_blank" rel="noreferrer noopener">juvenile COTS</a> is a highly effective way to reduce COTS populations because, not only are they removed before they can start feeding on <a href="https://www.earth.com/news/coral-bleaching-has-reached-catastrophic-levels-on-the-great-barrier-reef/" target="_blank" rel="noreferrer noopener">coral</a>, but they can be removed in large numbers because they are so small,” said Dr. Uthicke. 



Small starfish tend to spend time hiding in rubble and among broken coral fragments. The researchers discovered that crusty guardians live in those same hiding spots, and their diets sometimes include juvenile starfish.



“It’s a numbers game. Some of the crabs can eat 20 juveniles a day, whereas fish or triton may eat one adult every few days or per week,” said Dr. Uthicke. 



Differences in how often these crabs show up across the <a href="https://www.earth.com/news/fish-diversity-has-changed-dramatically-on-the-great-barrier-reef/" target="_blank" rel="noreferrer noopener">reef</a> may explain why some sections avoid major starfish invasions.



By using <a href="https://iucn.org/resources/issues-brief/environmental-dna" target="_blank" rel="noreferrer noopener">eDNA</a> (environmental DNA) methods, scientists found proof of starfish consumption without needing direct observation. Targeting scraps of genetic material helps capture hidden feeding patterns that traditional surveys might overlook.



<h2 class="wp-block-heading" id="h-wider-reef-implications">Wider reef implications</h2>



Scientists suspect that fewer small cryptic predators could give young starfish a better chance of surviving to adulthood. Removing juveniles early on may hold the key to keeping starfish populations in check.



A single decapod crab might appear harmless, yet large groups can collectively remove countless baby starfish. This kind of steady predation could halt population spikes before they cause coral damage.



Hidden crabs bring renewed attention to natural pest control on <a href="https://www.earth.com/news/restored-coral-reefs-can-bounce-back-in-just-four-years/" target="_blank" rel="noreferrer noopener">reefs</a>. Managers usually track adult starfish as they munch their way across corals, but juveniles slip below the radar and can later emerge en masse.



Marine experts believe many reef inhabitants remain poorly understood. The study suggests these overlooked animals could influence overall coral health by feeding on starfish in ways that bigger predators might not.



<h2 class="wp-block-heading" id="h-protecting-crab-populations">Protecting crab populations </h2>



Decapod crabs rely on healthy, structurally complex habitats. When reefs degrade, key crab hideouts disappear, leading to fewer opportunities for them to find and eat juvenile starfish.



Scientists note that preserving coral rubble habitat might help maintain crab populations. Extra protective measures could make a difference, especially in places that have experienced intense fishing or widespread coral decline.



Future work may look at what drives crab populations up or down and whether certain types of rubble or coral attract more crabs. Researchers might also see if artificial reefs provide enough shelter for these decapods to flourish.



Insights like these can improve management. Rather than focusing solely on adult starfish, officials could encourage conditions where small crustaceans thrive and reduce problems before they start.



<h2 class="wp-block-heading" id="h-a-sign-of-hidden-connections">A sign of hidden connections</h2>



Crustaceans are not the only puzzling factor in starfish control, yet their impact sparks curiosity about other nooks and crannies of reef life. Everything from tiny worms to <a href="https://www.earth.com/news/great-barrier-reef-is-on-the-brink-of-extinction/" target="_blank" rel="noreferrer noopener">reef</a> bacteria may hold clues.



Each new finding reminds us that reefs are webs of interactions with many unsung heroes. Understanding these links may be essential for long-term reef survival.



Researchers suggest that bolstering small predator populations could be a smart tactic in starfish management. Keeping these animal communities strong may help reefs bounce back faster when facing constant stress.



Local conservation groups already invest in large-scale starfish culls, but it may be easier to back up that work by maintaining conditions for crabs and other protective critters. The goal is to strike a balance that curbs harmful sea star numbers without disrupting other species.



The study is published in <a href="https://www.pnas.org/doi/10.1073/pnas.2424560122" target="_blank" rel="noreferrer noopener">Proceedings of the National Academy of Sciences</a>.



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Tiny crabs protect reefs by eating baby crown-of-thorns starfish

Coral reefs face threats from many sources, but the crown-of-thorns...

Biologging sensors attached to animals help researchers collect valuable data about marine environments. This data helps monitor human activities, such as fishing, pollution, and noise disturbances from boats and construction, providing insights into their impact on marine life.



A recent study from Kobe University highlights the importance of integrating data from different sources to create an “Internet of Animals” with open-access standards.



Human activities affect marine life in multiple ways. Fishing, industrial waste, and underwater construction alter <a href="https://www.earth.com/news/world-wildlife-day-2025-a-global-call-to-protect-nature/" target="_blank" rel="noreferrer noopener">habitats</a> and disrupt ecosystems. 



“There is a wealth of oceanographic data from research vessels, drifting buoys and satellites," said Professor IWATA Takashi, an animal ecologist at <a href="https://www.kobe-u.ac.jp/en/" target="_blank" rel="noreferrer noopener">Kobe University</a>.



"But due to technological and economic constraints, there are many observation gaps and some areas are inaccessible to humans, such as under sea ice or during harsh weather.” 



Understanding how these changes impact individual animals is difficult, making it challenging to design effective conservation strategies.



<h2 class="wp-block-heading" id="h-biologging-window-into-animal-experiences">Biologging: Window into animal experiences</h2>



Attaching small sensors, cameras, or tracking devices to wild animals is known as biologging. Scientists originally used biologging to study animal behavior and movement patterns. Now, it also helps analyze environmental changes affecting <a href="https://www.earth.com/news/what-animal-will-replace-humans-as-earths-dominant-species-this-scientist-has-an-idea/" target="_blank" rel="noreferrer noopener">marine life</a>.



“We try to minimize the impact this has on the animals by keeping the overall weight of the devices to less than 3% of the animal’s body weight, or even less than 1% for larger animals, and many researchers keep developing smaller and smaller devices," explained Iwata.



This method allows researchers to gather data without disturbing natural behaviors.



Biologging follows a Lagrangian observational method, meaning it moves with the animals, offering insights that fixed observation platforms like satellites or buoys cannot provide. It records a variety of environmental parameters, including temperature, salinity, and oxygen levels.



<h2 class="wp-block-heading" id="h-advancements-in-biologging-research">Advancements in biologging research</h2>



The researchers reviewed the latest advancements in biologging. Their analysis showed that biologging has improved typhoon forecasts, revealed differences in how turtle species react to plastic waste, exposed illegal fishing, and influenced the design of bird-friendly offshore wind farms.



“This review showed that while biologging alone is insufficient, it can fill in the gaps in existing knowledge," said Iwata.



"It provides a new type of data that differs from the wide-area environmental information obtained from earth observation satellites and other sources to tackle a broad range of <a href="https://www.earth.com/news/animals-secretly-reshape-landscapes-in-powerful-ways/" target="_blank" rel="noreferrer noopener">environmental issues</a>."



Combining biologging with other research methods offers a more complete understanding of marine ecosystems.



<h2 class="wp-block-heading" id="h-tackling-ocean-warming-and-pollution">Tackling ocean warming and pollution</h2>



Biologging offers a crucial tool for tracking ocean warming. By attaching GPS loggers to seabirds and marine mammals, scientists can measure ocean currents, wind patterns, and temperature changes over time. These observations have helped improve climate models and typhoon <a href="https://www.earth.com/news/animals-change-their-daily-schedules-when-tourists-are-watching/" target="_blank" rel="noreferrer noopener">tracking</a>.



Plastic pollution remains a major concern, especially its impact on marine life. Cameras attached to sea turtles have captured floating plastic bags, providing direct evidence of pollution in marine habitats. 



Loggerhead turtles swim past plastic, while green turtles sometimes mistake it for food. Such species-specific behaviors help shape targeted conservation strategies.



Chemical pollution also threatens marine ecosystems. Persistent organic pollutants accumulate in seabirds and marine mammals, serving as bio-indicators of contamination. Tracking these animals allows scientists to monitor pollution levels across different ocean regions.



<h2 class="wp-block-heading" id="h-challenges-in-fishery-management">Challenges in fishery management</h2>



Overfishing and bycatch pose significant threats to marine biodiversity. Biologging helps identify migration routes and breeding grounds for fish species like tuna and cod. This information supports more sustainable fishing policies.



Additionally, biologging has revealed that some marine animals, such as seals and whales, actively seek out fishing vessels to feed on discarded fish. This behavior increases the risk of entanglement and vessel collisions. 



Understanding these interactions can help develop better deterrent strategies.



<h2 class="wp-block-heading" id="h-conservation-and-marine-protected-areas">Conservation and marine protected areas</h2>



Noise pollution from shipping and offshore wind farms disrupts marine animals, particularly cetaceans that rely on echolocation. 



Biologging has demonstrated that naval sonar and shipping noise affect whale behavior, influencing feeding and migration patterns. Some studies have proposed raising turbine heights to minimize risks for seabirds.



Biologging also plays a key role in marine protected area (MPA) management. Data collected from tagged predators such as sharks and seals help determine whether existing MPAs effectively cover important habitats. 



Studies in the Ross Sea and British Indian Ocean Territory have confirmed that MPAs contribute to the conservation of top marine predators.



<h2 class="wp-block-heading" id="h-a-global-internet-of-animals">A global "Internet of Animals"</h2>



The full potential of biologging depends on worldwide cooperation. 



“The full potential of biologging can only be realized through increased global collaboration and data sharing, enabling the integration of data across <a href="https://www.earth.com/news/animal-size-and-cancer-risk-surprising-new-details-have-emerged/" target="_blank" rel="noreferrer noopener">species</a>, regions, and environmental contexts,” noted Iwata.



The researchers propose creating an “Internet of Animals,” where experts worldwide share biologging data to study marine life on a larger scale.



However, global data access and standardization remain major challenges. The Japanese research team calls for greater collaboration among scientists and data-sharing platforms to overcome these barriers.



<h2 class="wp-block-heading" id="h-expanding-biologging-s-reach">Expanding biologging’s reach</h2>



Iwata hopes this research will encourage more scientists to explore biologging. 



“If we can promote the sharing of biologging data through this paper, I hope to not only recruit more researchers to this field but also to so open up new angles that we haven’t yet envisioned,” he said.



“Researchers are not experts in social implementation, but in recent years, I have seen various issues being solved by sharing data in a data-driven society. It was an enjoyable task to think of ways to return the power of data to society.”



This study was conducted in collaboration with a researcher from <a href="https://www.waseda.jp/top/en/" target="_blank" rel="noreferrer noopener">Waseda University</a>. By promoting biologging and data-sharing, researchers hope to build a stronger foundation for marine conservation efforts.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S2772735125000265?via%3Dihub" target="_blank" rel="noreferrer noopener">Water Biology and Security</a>.



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Biologging: Animals are recording human impact on the ocean

Biologging sensors attached to animals help researchers collect valuable data...

Australia’s landscapes are home to one of nature’s most fascinating creatures - the kangaroo. Unique among large animals, kangaroos depend on hopping as their main form of locomotion.



This method of locomotion, known as saltation, allows them to cover vast distances with efficiency and speed. But how did <a href="https://www.earth.com/news/prehistoric-kangaroos-changed-their-diets-to-survive-climate-change/" target="_blank" rel="noreferrer noopener">kangaroos</a> develop this distinctive way of moving?



Understanding their evolutionary history requires looking at their ancestors, particularly the musky rat-kangaroo, the only macropodoid that does not hop.



<h2 class="wp-block-heading" id="h-kangaroo-relatives-that-don-t-hop">Kangaroo relatives that don't hop</h2>



Amy Tschirn is a PhD student and researcher in the <a href="https://www.flinders.edu.au/college-science-engineering" target="_blank" rel="noreferrer noopener">College of Science and Engineering</a> at Flinders University, and co-lead author of the study.



"The musky rat-kangaroo, as the most primitive living macropodoid (a group that includes kangaroos, wallabies, potoroos and bettongs), can offer insight into evolution within the group, including the origin of bipedal hopping locomotion,” said Tschim.



“As the only living macropodoid that doesn’t hop, the musky rat-kangaroo provides a crucial insight into how and when the iconic hopping form of locomotion evolved in Australia.”



Studying the musky rat-kangaroo helps scientists understand how early macropodoids moved before developing bipedal hopping. 



This tiny marsupial, found in the dense rainforests of Queensland, may hold the key to unlocking the evolutionary steps that led to modern <a href="https://www.earth.com/news/protemnodon-kangaroo-fossils-may-explain-their-extinction/" target="_blank" rel="noreferrer noopener">kangaroos</a>.



<h2 class="wp-block-heading" id="h-musky-rat-kangaroos-in-the-wild">Musky rat-kangaroos in the wild</h2>



To study the movement of musky rat-kangaroos, researchers observed them in their natural habitat in the Atherton Tableland, a region in far-northern Queensland. 



By filming adult muskies in the wild, they documented how these animals move and whether any form of hopping appeared in their locomotion. The findings revealed something remarkable.



Unlike any other marsupial that moves on all fours, musky rat-<a href="https://www.earth.com/news/giant-kangaroos-of-the-past-didnt-hop-they-walked-on-all-fours/" target="_blank" rel="noreferrer noopener">kangaroos</a> use a distinct style of movement called a "bound" or "half-bound" gait. This means their hindfeet move together in synchrony rather than alternating as in most quadrupedal animals. 



This movement pattern is unusual among marsupials and could provide crucial insight into how macropodoids transitioned toward hopping.



<h2 class="wp-block-heading" id="h-role-of-quadrupedal-movement">Role of quadrupedal movement</h2>



Observations also confirmed that musky rat-kangaroos never hop, even when moving at their fastest speeds. This means that hopping likely developed later in macropodoid evolution.



“There remains no evidence of hopping in this <a href="https://www.earth.com/news/the-wallace-line-a-natural-border-that-no-species-crosses/" target="_blank" rel="noreferrer noopener">species</a>. Even when travelling at high speeds, muskies always use quadrupedal gaits, never rearing up on just their back legs,” said Harvard’s Dr. Peter Bishop, co-lead author of the research paper.



“These results support the hypothesis that a shift to an asymmetric-gait-dominant locomotor repertoire was a functional prerequisite in the evolution of bipedal hopping in macropodoids.”



Since musky rat-kangaroos lack the ability to hop, scientists believe that the transition toward bipedal movement must have started with an intermediary stage. The bounding gait of these small marsupials may represent a stepping stone in this evolutionary process.



<h2 class="wp-block-heading" id="h-bounding-led-to-hopping-in-kangaroos">Bounding led to hopping in kangaroos</h2>



The musky rat-kangaroo's movement patterns align with previous studies on quadrupedal Australian marsupials. 



Many use symmetric gaits at lower speeds and shift to asymmetric gaits at higher speeds. Unlike most, however, the musky rat-kangaroo exclusively uses asymmetric gaits, even at slow speeds.



Research suggests that early macropodoids likely adopted a bounding gait before transitioning to bipedal hopping. Small potoroids, close relatives of kangaroos, demonstrate this transition by using both quadrupedal bounding and bipedal hopping at different speeds. 



This pattern hints that bounding could have been the crucial precursor to the hopping behavior seen in modern kangaroos.



<h2 class="wp-block-heading" id="h-body-structure-and-the-kangaroo-hop">Body structure and the kangaroo hop</h2>



The musky rat-kangaroo also retains several physical traits that distinguish it from true hopping macropodoids. Its forelimbs and hindlimbs are proportionally closer in size compared to kangaroos, which have much longer hindlimbs adapted for hopping. 



The musky rat-kangaroo also has a mobile first toe, something absent in larger macropodoids. These features suggest that its anatomy is better suited for quadrupedal movement, making it unlikely to develop hopping.



Studies on limb proportions across marsupials and rodents indicate that animals capable of bipedal locomotion generally have shorter forelimbs relative to their hindlimbs. 



The musky rat-kangaroo falls somewhere in between, suggesting it represents an early stage in macropodoid evolution before the full transition to bipedal hopping.



<h2 class="wp-block-heading" id="h-from-bounding-to-hopping">From bounding to hopping</h2>



The transition from quadrupedal movement to bipedal hopping remains one of the most intriguing mysteries of kangaroo evolution. By studying the musky rat-kangaroo’s anatomy and locomotion, researchers can piece together the story of how hopping emerged.



“These results signal a potential pathway to how bipedal hopping evolved in kangaroos. Perhaps it started with an ancestor that moved about on all fours like other marsupials, then an animal that bounded like the muskies, and finally evolved into the iconic hopping kangaroos we see in Australia today.”



This suggests that early macropodoids may have first adopted bounding gaits, allowing them to generate forward momentum using their powerful hind legs. 



Over time, as these animals became more specialized, they may have started relying solely on their back legs, leading to the development of true hopping.



<h2 class="wp-block-heading" id="h-future-of-kangaroo-evolution-studies">Future of kangaroo evolution studies</h2>



The research, published in Australian Mammalogy, provides an important foundation for future studies on kangaroo evolution. 



While the mystery of hopping is still being unraveled, fossil discoveries from early macropodoids could provide more clues about how and when kangaroos made the final leap into bipedal hopping.



Scientists also hope to answer another key question: why did hopping kangaroos grow so much larger than rodents, which also use saltation? Understanding this could reveal more about the evolutionary pressures that shaped Australia’s unique wildlife.



By continuing to study living species like the musky rat-kangaroo and examining fossils from early kangaroo ancestors, researchers move closer to understanding one of the most distinctive adaptations in the animal kingdom.



The study is published in the journal <a href="https://www.publish.csiro.au/AM/AM24050" target="_blank" rel="noreferrer noopener">Australian Mammalogy</a>.



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How did the kangaroo learn to hop? Insights from its smallest relative

Australia’s landscapes are home to one of nature’s most fascinating...

World Frog Day is more than just a date on the calendar - it’s a global wake-up call. For 265 million years, frogs have hopped through Earth’s ever-changing landscapes. 



They outlived dinosaurs, weathered ice ages, and adapted to shifting climates. Yet today, despite their incredible resilience, frogs stand on the brink of disaster.



These small, unassuming creatures do far more than fill the air with their evening croaks. They control insect populations, provide food for countless predators, and serve as nature’s bioindicators because they are sensitive to environmental changes long before these become crises. 



When <a href="https://www.earth.com/news/missing-frog-species-alsodes-vittatus-resurfaces-after-130-years/" target="_blank" rel="noreferrer noopener">frogs</a> start disappearing from an ecosystem, it’s a sign that something is deeply wrong.



Pollution, deforestation, climate change, and the deadly chytrid fungus are driving entire species to extinction at an alarming rate. 



If frog populations continue to decline, the consequences will be catastrophic. Ecosystems will become unbalanced, food chains may collapse, and Earth will lose one of its most ancient inhabitants.



That’s why&nbsp;World Frog Day, observed every&nbsp;March 20&nbsp;since&nbsp;2014, is important. It shines a spotlight on these amphibians, raises awareness about their plight and urges action before time runs out.



<h2 class="wp-block-heading" id="h-why-frogs-matter">Why frogs matter</h2>



Frogs are key players in natural ecosystems. As predators, they feast on mosquitoes, flies, and agricultural pests, helping control populations that could otherwise spiral out of balance.



Without them, farmers would struggle with increased infestations, and diseases spread by insects could become even harder to manage.



On the flip side, frogs themselves are prey for countless creatures; birds, fish, reptiles, and even some mammals rely on them as a food source. If frogs disappear, so do many of the animals that depend on them, which would trigger a domino effect throughout the ecosystem.



Then there’s their role as bioindicators. Healthy frog populations signal healthy environments. But declining frog populations indicate bigger issues - polluted waters, rising temperatures, or habitat destruction, for example. 



<h2 class="wp-block-heading" id="h-frogs-are-facing-many-threats">Frogs are facing many threats </h2>



Despite their adaptability, frogs face an uphill battle for survival, with habitat destruction being the primary threat.



Wetlands are commonly drained for urban expansion and forests are cut down to make way for agriculture. Rivers and lakes are polluted with industrial waste and pesticides. Every time humans encroach on these habitats, frog populations shrink a little more.



Pollution is another major issue. Since <a href="https://www.earth.com/news/walking-on-water-cricket-frogs-redefine-aquatic-locomotion/" target="_blank" rel="noreferrer noopener">frogs</a> absorb water directly through their porous skin, they have no defense against toxins in their environment. Pesticides used in farming leach into nearby ponds and streams, poisoning frogs from the outside in.



Then there’s the chytrid fungus, a disease that has devastated amphibian populations worldwide. It attacks their skin, and prevents them from absorbing water and essential nutrients. Entire species have been wiped out in mere decades by this devastating fungus. 



<h2 class="wp-block-heading" id="h-climate-change-is-making-things-worse">Climate change is making things worse</h2>



As if habitat loss and pollution weren’t enough, <a href="https://www.earth.com/news/frog-saunas-hot-solution-to-fighting-global-amphibian-extinction-apocalypse/" target="_blank" rel="noreferrer noopener">frogs</a> are also battling the effects of climate change. 



Rising temperatures have thrown off their breeding cycles, causing unpredictable shifts in their life stages. Some species, accustomed to stable seasonal patterns, now struggle to find mates or lay eggs at the right time.



Extreme weather events have also taken a toll. In some areas, prolonged droughts have dried up breeding ponds before tadpoles have had a chance to develop. In others, flooding has swept away entire populations. 



<h2 class="wp-block-heading" id="h-the-fight-to-save-the-frogs">The fight to save the frogs</h2>



Despite the grim outlook, conservationists aren’t giving up. Around the world, dedicated researchers and volunteers are working to preserve frog habitats, restore wetlands, and develop captive breeding programs for endangered species. 



In some cases, frogs have been reintroduced into the wild after their populations were nearly wiped out - a small but hopeful sign that efforts can make a difference.



One of the most effective strategies has been the creation of protected areas where <a href="https://www.earth.com/news/frogs-exposed-to-radiation-show-no-signs-of-accelerated-aging/" target="_blank" rel="noreferrer noopener">amphibians</a> can thrive without human interference. These conservation zones shield frogs from pollution, deforestation, and urban expansion, giving them a fighting chance at survival. 



Scientists are also working to combat the chytrid fungus, testing anti-fungal treatments that could slow or stop the spread of infection.



<h2 class="wp-block-heading" id="h-take-action-on-world-frog-day">Take action on World Frog Day</h2>



World Frog Day 2025 presents us with a chance to take action. Across the globe, events will highlight the importance of frog conservation, from educational programs at zoos, to hands-on habitat restoration projects.



The Little Rock Zoo in Arkansas, for example, is set to host special exhibits and talks about amphibian protection. Schools and nature organizations will also join in, organizing workshops and field trips to explore local frog populations.



But you don’t need to attend an event to make a difference. Learning about the different species of frogs in your region is a good start. Avoiding pesticides and herbicides in your garden helps protect their habitats. Creating a frog-friendly space with native plants, small ponds, or log shelters can provide much-needed refuge.



If you want to do more, consider supporting conservation organizations. Donations help fund research, breeding programs, and habitat restoration efforts. Volunteering for local environmental groups can also put you on the frontlines of conservation work.



You can even virtually adopt a tree frog through the <a href="https://gifts.worldwildlife.org/gift-center/gifts/species-adoptions/red-eyed-tree-frog?srsltid=AfmBOorRwjDH5ydXRC_2hQV_O2f5MO1PjHWAutpoeSOhQp7kn7mTcs6P" target="_blank" rel="noreferrer noopener">World Wildlife Fund</a>.



<h2 class="wp-block-heading" id="h-a-world-without-frogs">A world without frogs?</h2>



The loss of frogs isn’t just an ecological disaster - it’s a warning. Their decline signals deeper problems in our environment, problems that will eventually affect humans too. 



If frogs disappear, it means our water is more polluted, our ecosystems are out of balance, and the natural world is in crisis.



World Frog Day reminds us that their survival is tied to our own. By protecting them, we protect ourselves and the planet we share. Whether it’s through education, activism, or simple everyday choices, everyone can contribute to this effort. 



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World Frog Day 2025: Protecting nature’s tiny guardians

World Frog Day is more than just a date on...

In the forests of Tanzania, chimpanzees have long been known to fish for termites using handmade tools crafted from local plants. But what makes this behavior even more fascinating is how carefully they seem to choose the materials for their tools.



New research now shows that these <a href="https://www.earth.com/news/primates-face-an-uncertain-future-due-to-climate-change/" target="_blank" rel="noreferrer noopener">primates</a> are not just grabbing any nearby stick to poke into a termite nest - they’re making smart choices based on how flexible and effective the material is.



This discovery comes from a collaborative effort between researchers at the University of Oxford’s <a href="https://www.anthro.ox.ac.uk/" target="_blank" rel="noreferrer noopener">School of Anthropology</a> and Museum Ethnography, the Max Planck Institute for Evolutionary Anthropology, the Jane Goodall Institute in Tanzania, the University of Algarve, the University of Porto in Portugal, and the University of Leipzig.



The study sheds light on the technical thinking behind chimpanzee tool use, a largely invisible part of primate evolutionary history.



<h2 class="wp-block-heading" id="h-chimpanzees-prefer-flexible-tools-for-fishing">Chimpanzees prefer flexible tools for fishing</h2>



To eat <a href="https://www.earth.com/news/termites-are-natures-architects-building-well-ventilated-nests/" target="_blank" rel="noreferrer noopener">termites</a>, chimpanzees must first catch them. The primates use thin plant probes to pull the insects carefully out of narrow, winding tunnels inside termite mounds.



The team proposed that flexible tools would work better in these tight spaces than rigid sticks. To test this, lead author Alejandra Pascual-Garrido brought a portable mechanical tester to Gombe Stream National Park. She measured the amount of force it took to bend different plant materials.



The results were striking. <a href="https://www.earth.com/news/plants-can-sense-when-something-touches-them-despite-not-having-nerves/" target="_blank" rel="noreferrer noopener">Plants</a> that the chimpanzees actually used were much more flexible than those that were available but ignored. 



On average, unused plants were 175 percent more rigid. Even among plants growing side-by-side near the termite mounds, the ones that were repeatedly used produced significantly more flexible tools.



“This is the first comprehensive evidence that wild chimpanzees select tool materials for <a href="https://www.earth.com/news/chimpanzees-have-a-peak-season-for-termite-fishing/" target="_blank" rel="noreferrer noopener">termite fishing</a> based on specific mechanical properties,” said Pascual-Garrido, who has been studying chimpanzee tool-making in Gombe for over ten years.



<h2 class="wp-block-heading" id="h-shared-preferences-across-africa">Shared preferences across Africa</h2>



Interestingly, the same plant species used by chimpanzees in Gombe such as Grewia - are also used by other chimpanzee populations living thousands of kilometers away.



This pattern suggests that the mechanical qualities of these plants are so useful that they’ve become common knowledge among different chimpanzee groups. It also hints that this knowledge might be deeply embedded in <a href="https://www.earth.com/news/chimpanzee-cultures-are-more-complex-than-we-realized/" target="_blank" rel="noreferrer noopener">chimpanzee culture</a>.



Their choices suggest a kind of natural logic. Chimpanzees may have what scientists call a “folk physics” - an intuitive understanding of which materials will get the job done.



Their knack for selecting the right plant isn’t just done by trial and error. It’s a skill. And it's one that might reflect the kind of thinking our early human ancestors used when building their own tools.



“This novel approach, which combines biomechanics with animal behaviour, helps us better understand the cognitive processes behind chimpanzee tool construction and how they evaluate and select materials based on functional properties,” said Pascual-Garrido.



<h2 class="wp-block-heading" id="h-new-questions-about-chimpanzees">New questions about chimpanzees </h2>



The research opens up more questions than it answers. How do young chimpanzees learn which materials to use? Do they copy their mothers? And do they apply the same rules when choosing tools for other jobs - like collecting ants or honey?



“This finding has important implications for understanding how humans might have evolved their remarkable tool using abilities,” explained Adam van Casteren from the Department of Human Origins at the Max Planck Institute for Evolutionary Anthropology.



“While perishable materials like wood rarely survive in the archaeological record, the mechanical principles behind effective tool construction and use remain constant across species and time.”



These behaviors also raise questions about memory, experience, and even innovation in non-human primates. 



<h2 class="wp-block-heading" id="h-clues-about-early-humans">Clues about early humans</h2>



Understanding how chimpanzees refine their techniques over time could reveal a primitive form of trial-and-error learning that mirrors early human problem-solving.



By studying chimpanzees and their preferences for certain types of materials, researchers hope to uncover clues about how early humans may have started crafting implements long before stone tools appeared in the archaeological record.



It’s a small but meaningful step toward understanding the roots of human intelligence - through the eyes, and hands, of our closest extant relatives.



The full study was published in the journal <a href="https://www.cell.com/iscience/fulltext/S2589-0042(25)00419-5?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS2589004225004195%3Fshowall%3Dtrue" target="_blank" rel="noreferrer noopener">iScience</a>.



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Chimpanzees have tool-making skills similar to human engineers

In the forests of Tanzania, chimpanzees have long been known...

Sharks have roamed the oceans for millions of years. Their powerful jaws and sharp teeth make them top predators that are capable of influencing entire marine ecosystems. 



However, understanding what they eat and where they feed remains difficult. This is especially true for rare or protected species where direct sampling poses legal and ethical challenges.



Traditionally, scientists study shark diets by examining their teeth. But collecting samples from live sharks can be risky, costly, and often impossible, especially when dealing with <a href="https://www.earth.com/news/why-some-great-hammerhead-sharks-rarely-leave-home/" target="_blank" rel="noreferrer noopener">threatened species</a>. 



Yet, every opportunity to gather data matters. That’s where the past meets the present - inside the drawers and display cases of museums.



A new study led by researchers from Flinders University has found that preserved shark jaws - often considered to be static relics - can be a powerful scientific resource. 



Using teeth from sharks in historical collections, researchers can now study shark diets without touching a living specimen.



This breakthrough offers new hope for <a href="https://www.earth.com/news/one-third-of-shark-species-face-extinction-despite-fishing-bans/" target="_blank" rel="noreferrer noopener">marine science</a> and conservation.



<h2 class="wp-block-heading" id="h-shark-jaws-reveal-feeding-secrets">Shark jaws reveal feeding secrets</h2>



Shark teeth hold chemical signatures that reveal details of their past meals and feeding grounds. These signatures come from ratios of stable isotopes - naturally occurring variations of chemical elements. By examining these isotopes, scientists can piece together an animal’s ecological history.



Until now, scientists avoided using preserved jaws due to concerns that cleaning chemicals might have distorted the isotopes.



Many <a href="https://www.earth.com/news/mediterranean-sharks-face-growing-threats-despite-conservation-efforts/" target="_blank" rel="noreferrer noopener">shark</a> jaws in museums and private collections have been treated with substances like ethanol, bleach, or hydrogen peroxide. These treatments whiten the teeth but were thought to possibly alter their chemical composition.



However, the new research shows otherwise. The team discovered that these chemicals do not affect the key isotopes used in diet studies. This means that thousands of jaws from past decades are now usable in ways previously thought impossible.



"Most shark jaws in museums and private collections are chemically treated, so understanding if, or how these treatments affect tooth isotopes is crucial," said Flinders research associate Dr. Lauren Meyer.



"Finding that preservation chemicals had no impact on isotope values opens the door for the use of jaws from historic collections across Australia and globally."



This discovery means scientists can study <a href="https://www.earth.com/news/sharks-may-benefit-from-rising-temperatures-but-not-from-rising-co2/" target="_blank" rel="noreferrer noopener">shark</a> diets without needing fresh tissue samples. It also significantly broadens the scope of possible studies, including comparative diet research across different eras and regions.



<h2 class="wp-block-heading" id="h-chemical-clarity-through-isotope-testing">Chemical clarity through isotope testing</h2>



The study involved stable isotope analysis, which looks at carbon, nitrogen, and sulfur isotopes. These elements help identify where and what an <a href="https://www.earth.com/news/megalodon-was-sleeker-and-longer-than-previously-imagined/" target="_blank" rel="noreferrer noopener">animal</a> has been eating.



"The chemicals in teeth provide a story of what the shark has eaten and from where, whether that be sea lions in South Australia, or tuna in New South Wales," explained lead author Laura Holmes, from the Southern Shark Ecology Group in the College of Science and Engineering at <a href="https://www.flinders.edu.au" target="_blank" rel="noreferrer noopener">Flinders University</a>.



The researchers partnered with the Isotope Ratio Mass Spectrometry Laboratory at the <a href="https://www.utas.edu.au" target="_blank" rel="noreferrer noopener">University of Tasmania</a>. 



The team tested teeth from three very different elasmobranchs: cownose rays, gummy sharks, and broadnose sevengill sharks.



Despite their structural differences, all samples held up under isotope testing.



<h2 class="wp-block-heading" id="h-rare-species-now-within-scientific-reach">Rare species now within scientific reach</h2>



Access to historical jaws brings particular value when studying rare or threatened shark species. These species often cannot be sampled directly, but many have had jaws collected as trophies. 



With these now validated as reliable data sources, older specimens can help researchers understand long-term dietary trends.



"This is especially useful for rare or threatened species, for which standard tissue samples may not be readily available, but for which trophy jaws have been collected, such as white sharks, tiger sharks, and makos," said Dr. Meyer.



Older collections, such as those from the 1970s and 1980s, now offer a scientific window into the past. This information is crucial as many shark species face increasing pressure from human activities, climate change, and habitat degradation.



<h2 class="wp-block-heading" id="h-applications-across-marine-life">Applications across marine life</h2>



While this study focused on sharks and rays, the implications go beyond these groups.



Other marine predators, such as killer whales, sperm whales, and fur seals, also have teeth stored in museum collections. These could be tested using the same methods, opening new research pathways.



"This study opens the door to use a tremendous resource of samples to untangle the current and historic diet and foraging habitats of complex predators - making the most exciting finding from this study the capacity for new research that is now possible," said Dr. Meyer.



These findings not only expand the toolkit for marine scientists but also enhance our understanding of ocean ecosystems over time. Every preserved tooth could tell a story. 



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S0141113625001205?via%3Dihub" target="_blank" rel="noreferrer noopener">Marine Environmental Research</a>.



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Chemical clues from old shark jaws reveal diets and habitats

Sharks have roamed the oceans for millions of years. Their...

The feeling of fullness after a nice meal usually prevents us from eating more. This is a familiar experience for humans, but we are not alone. We share this with starfish and many other organisms as well.



New research indicates that the same message instructing us to eat no more has existed for more than 500 million years. The same molecule affecting our feeding behavior in this way also acts on starfish and other sea animals.



Researchers at <a href="https://www.qmul.ac.uk/" target="_blank" rel="noreferrer noopener">Queen Mary University of London</a> have followed the evolutionary trail of a neurohormone named bombesin, which regulates appetite in humans. 



Collaborating with colleagues at the Institut Pasteur in Paris and the University of Warwick, the researchers discovered that this satiety-inducing peptide is much older than was thought, and is found in animals that lived before the first <a href="https://www.earth.com/news/over-half-of-the-worlds-vertebrates-reside-in-the-tropics/" target="_blank" rel="noreferrer noopener">vertebrates</a> set foot on Earth.



<h2 class="wp-block-heading" id="h-what-is-bombesin">What is bombesin?</h2>



Bombesin is a small peptide that helps regulate appetite by sending a message when it's <a href="https://www.earth.com/news/neurons-discovered-that-tell-us-when-to-stop-eating/" target="_blank" rel="noreferrer noopener">time to stop eating</a>. While it’s been studied in humans and other mammals, its origins were less understood - until now. 



Researchers discovered that a bombesin-like molecule is present in echinoderms like starfish, sea urchins, and sea cucumbers.



If you’re wondering about the unusual name, bombesin isn’t explosive. It’s named after the fire-bellied toad, Bombina bombina, where it was first identified in 1971. 



Scientists noticed that injecting this compound into <a href="https://www.earth.com/news/evolutionary-mystery-why-are-mammals-the-only-vertebrates-to-have-only-one-lower-jawbone/" target="_blank" rel="noreferrer noopener">mammals</a> caused them to eat less and take longer between meals. This led to the idea that bombesin-like neurohormones are part of the body’s natural appetite control system.



Today, compounds that mimic bombesin are being explored as potential treatments for obesity, alongside well-known medications like Ozempic.



<h2 class="wp-block-heading" id="h-a-needle-in-a-haystack">A needle in a haystack</h2>



The research team began by searching for bombesin-like genes in <a href="https://www.earth.com/news/ocean-noise-can-be-fatal-to-marine-invertebrates/" target="_blank" rel="noreferrer noopener">marine invertebrates</a>. 



“It was a bit like looking for a needle in a haystack,” said Professor Maurice Elphick. “But eventually we discovered genes encoding a bombesin-like neurohormone in the genomes of starfish and their relatives.”



Once the gene was identified in the common starfish (Asterias rubens), scientists named the molecule ArBN. 



Collaborators at the University of Warwick used mass spectrometry to determine the exact structure of ArBN, which allowed the molecule to be synthesized for lab testing.



<h2 class="wp-block-heading" id="h-watching-starfish-eat-or-not-eat">Watching starfish eat - or not eat</h2>



<a href="https://www.earth.com/news/starfish-break-off-their-arms-to-evade-danger-and-regenerate-them-later/" target="_blank" rel="noreferrer noopener">Starfish</a> feed in a bizarre and fascinating way: they push their stomachs out through their mouths to digest prey like mussels. The team wanted to know how ArBN affected this feeding behavior.



“When I tested ArBN, I saw that it caused contraction of the starfish stomach. This suggested that ArBN might be involved in stimulating stomach retraction when starfish stop feeding. And this is exactly what I found," explained Dr. Weiling Huang, who conducted the behavioral tests. 



"When I injected ArBN into starfish with their stomachs everted, it triggered the stomach to retract back into the mouth. What’s more, ArBN also delayed the initiation of feeding, as starfish injected with ArBN took longer to enclose a mussel compared to those injected with water.”



<h2 class="wp-block-heading" id="h-a-molecule-older-than-starfish">A molecule older than starfish</h2>



Understanding that bombesin-like molecules have been regulating feeding behavior since before the rise of vertebrates adds an important piece to the puzzle of how appetite evolved. 



“We can infer that this function extends back half-a-billion years to the common ancestor of starfish, humans, and other vertebrates,” said Professor Elphick.



But the implications go beyond biology textbooks. Some species of starfish are moving into new habitats due to climate change. In particular, these species are seeking cooler waters where shellfish farms are located, and may threaten aquaculture operations.



“One of the consequences of climate change is that some starfish species are invading cooler waters where shellfish are cultivated for human consumption,” said Professor Elphick.



“Discovering molecules that inhibit feeding in starfish could be useful in managing these invasions.”



<h2 class="wp-block-heading" id="h-more-than-just-an-ancient-molecule">More than just an ancient molecule</h2>



This study connects two very different worlds: the sophisticated brain-gut interactions in humans and the slow, alien feeding behavior of starfish. Yet both rely on the same ancient molecule to know when it's time to stop eating.



As scientific discoveries reveal the biological links between species, the deep interconnectedness of all life becomes ever more apparent.



The full study was published in the journal <a href="https://dx.doi.org/10.1073/pnas.2420966122" target="_blank" rel="noreferrer noopener">Proceedings of the National Academy of Sciences</a>.



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Ancient molecule tells starfish and humans when to stop eating

The feeling of fullness after a nice meal usually prevents...

Since the Industrial Revolution, the world has witnessed a sharp increase in noise pollution generated by human activities. Whether it’s the constant hum of traffic, airplanes overhead, or the repetitive clamor of construction, these sounds can obstruct animals’ abilities to give and receive crucial signals - a process that is fundamental to their survival and reproduction.



Now, a team of biologists at the <a href="https://www.unl.edu/" target="_blank" rel="noreferrer noopener">University of Nebraska–Lincoln</a> (UNL) has published one of the first known studies demonstrating how one group of animals can react to human-made noise by adjusting its own method of sensing sounds.&nbsp;



In an article published in the journal <a href="https://dx.doi.org/10.1016/j.cub.2025.02.041" target="_blank" rel="noreferrer noopener">Current Biology</a>, researchers Brandi Pessman and Eileen Hebets show that funnel-weaving <a href="https://www.earth.com/news/spiders-reveal-how-cave-creatures-lose-their-vision-over-time/" target="_blank" rel="noreferrer noopener">spiders</a> alter how their silk webs transmit vibrations in response to local noise. 



This finding suggests that the spiders might deliberately change web structure to cope with the auditory chaos surrounding them, ensuring they receive vital cues from potential mates, prey, or predators.



<h2 class="wp-block-heading" id="h-a-key-discovery-about-web-adjustments">A key discovery about web adjustments</h2>



Drawing on lab experiments, the study uncovered a particularly unexpected insight: the way a spider’s web conveys vibrations varies depending on whether its architect was collected from a rural or urban area. This discrepancy hints at the idea that prior exposure to noise - possibly even inherited across generations - may influence a spider’s malleability when it comes to spinning webs.



“One of the most interesting things that we found is that urban and rural spiders are reacting differently when they're put into a noisy environment,” said Pessman, a postdoctoral researcher in biological sciences and the lead author of the paper. 



“This means that spiders with different experiences with noise - whether they themselves experienced it or their mothers passed it down to them across generations - respond differently.”



<h2 class="wp-block-heading" id="h-spider-webs-as-sensory-extensions">Spider webs as sensory extensions</h2>



It has been well documented that animals such as birds and <a href="https://www.earth.com/news/climate-change-is-altering-the-calls-and-voices-of-frogs-around-the-world/" target="_blank" rel="noreferrer noopener">frogs</a> can change their calls or the timing of their vocalizations in the face of increased human noise. However, little was known about how animals manage to tweak the way they receive acoustic or vibratory signals. 



The main challenge is the hidden nature of most animals’ sensory systems, which are located within their bodies. But web-building spiders are unique, as their webs function effectively like external sensory extensions that capture vibrations from the environment.



This distinction makes funnel-weaving spiders, also known as Agelenopsis pennsylvanica, an ideal test group. They rely predominantly on vibratory signals for vital information. Their webs connect to various surfaces - trees, rocks, or buildings - capable of transmitting the vibratory noise created by <a href="https://www.earth.com/news/some-birds-get-road-rage-when-exposed-to-traffic-noise/" target="_blank" rel="noreferrer noopener">traffic</a>, industrial activities, and more.&nbsp;



The research team hypothesized that funnel-weaving spiders might be able to reduce the volume of unwanted or irrelevant vibrations caused by human-related noise, which often shares the frequency range these spiders need for effective communication.



<h2 class="wp-block-heading" id="h-spiders-in-urban-areas">Spiders in urban areas</h2>



Pessman started by collecting a total of 60 funnel-weaving spiders in and around Lincoln, Nebraska - some from city settings and others from out in the countryside. In the lab, the spiders were then placed in controlled environments that were either quiet or noisy as they spun webs over four nights. 



Upon completion, the researchers introduced test vibrations into those webs, measuring how energy moved across the silk in different conditions.



They observed that spiders from urban areas tended to build webs that lost more energy in short-distance vibrations across a broader set of frequencies when placed under noisy conditions. 



Interpreted practically, these webs essentially “muffled” environmental noise. This may prevent sensory overload, giving the spiders a clearer signal from <a href="https://www.earth.com/news/largest-predator-prey-feast-ever-seen-in-the-ocean-enormous-quickly-altered-food-chain/" target="_blank" rel="noreferrer noopener">prey</a> or other relevant vibrations in their immediate vicinity.



<h2 class="wp-block-heading" id="h-spiders-that-are-exposed-to-less-noise">Spiders that are exposed to less noise</h2>



Meanwhile, rural spiders assembled their webs in such a way that energy from biologically important long-distance vibrations was preserved. This indicates they might be amplifying or enhancing certain frequency ranges to pick out meaningful vibrations above the background noise.



“Rural spiders are not used to as much noise in their environment,” Pessman said. “When they suddenly get a lot of noise, they might try to 'turn up' the volume in their webs or amplify what's coming in to better hear certain signals above the noise.”



<h2 class="wp-block-heading" id="h-implications-for-ecology-and-future-studies">Implications for ecology and future studies</h2>



Given the role of funnel webs as external sensory structures, these findings open a new window into how animals can adjust the way they receive signals, a research area that had remained largely unclear until now. 



The ability to alter web structure in response to different noise environments could prove vital as human-made noise continues to escalate across the planet.



In the future, the team plans to investigate precisely how the spiders are changing their webs - whether they adjust the tension of certain silk lines, vary anchor points, or adopt an entirely new shape to filter or boost specific frequencies. 



High-speed video of the web-building process, combined with digital tracking methods, will let them delve deeper into these construction nuances.



<h2 class="wp-block-heading" id="h-spiders-overcoming-environmental-noise">Spiders overcoming environmental noise</h2>



“This study really highlights the role of receivers in overcoming environmental noise,” said Hebets, who is a professor of biological sciences at UNL. 



“It opens up entirely new avenues of research. For example, are receivers placing themselves at certain locations in the environment where signals are going to receive less attenuation or overlap of noise?”



By revealing that some species can modify their “sensor” for hearing, the team hopes to inspire more research on how other animals cope with rising noise levels. 



The funnels built by these little invertebrates may seem inconsequential to an urban passerby, but as the study shows, each strand of silk can be precisely tuned to help the spider thrive in a clamorous world.



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