Over the years, aquarists and biologists have marveled at the dramatically thick lips of several African cichlid species. These unique fish, found in lakes Victoria, Malawi, and Tanganyika, have puzzled researchers who seek to understand how and why such large lips evolved.



This fascination has led to fresh investigations by scientists comparing lip structures, tissue composition, and gene expression in these fish. 



The research effort is led by Dr. Nagatoshi Machii from the <a href="https://www.isct.ac.jp/" target="_blank" rel="noreferrer noopener">Tokyo Institute of Technology</a>, whose group has examined microscopic details and molecular data to pinpoint what drives lip enlargement in certain cichlids.



<h2 class="wp-block-heading" id="h-cichlid-lips-and-parallel-evolution">Cichlid lips and parallel evolution</h2>



Researchers have documented that cichlids across different lakes display similar traits, even though they are not closely related. Such repeated emergence of shared features is known as <a href="https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/parallel-evolution" target="_blank" rel="noreferrer noopener">parallel evolution</a>, a process often fueled by environmental pressures.



“Parallel evolution is evidence of natural selection that drives adaptive solutions to the environment,” wrote Jonathan Losos, an evolutionary biologist based at Harvard.



<h2 class="wp-block-heading" id="h-lakes-as-natural-laboratories">Lakes as natural laboratories</h2>



The isolated ecosystems of Lake Victoria, Malawi, and Tanganyika act like nature’s own research stations. Each lake evolved its own line of cichlid species, yet many developed the same traits independently - a perfect setup to study parallel evolution.



By comparing species across these lakes, scientists can spot patterns that might be missed in a single location. It’s a rare opportunity to test how evolution repeats itself under similar <a href="https://www.earth.com/news/social-stress-harms-the-brains-of-low-status-fish/" target="_blank" rel="noreferrer noopener">environmental conditions</a> but with different starting points.



<h2 class="wp-block-heading" id="h-unmasking-the-lip-building-proteins">Unmasking the lip-building proteins</h2>



Detailed analyses indicate that thick cichlid lips contain a proteoglycan-rich layer (a structural element found in various tissues, including bone, cartilage, tendons, and skin, that play crucial roles in tissue organization, hydration, and mechanical properties) not seen in normal-lipped fish. 



Proteoglycans are large molecules with attached sugar chains, sometimes linked to extra water retention.



One study on cichlids with enlarged lips showed that certain proteins, including chondroitin sulfate proteoglycans, were in high abundance. This composition may give these hefty lips their signature plumpness by increasing connective tissue volume.



<h2 class="wp-block-heading" id="h-lip-growth-starts-young">Lip growth starts young</h2>



The team found that differences in gene expression begin earlier than expected. Even in juvenile cichlids, before their lips fully thicken, the genes responsible for building extracellular matrix components are already more active in species that develop larger lips.



This suggests the groundwork for lip hypertrophy is laid early in life and then reinforced as the fish matures. The continuous expression of these genes throughout development points to a tightly regulated system that ensures these lip traits persist across generations.



<h2 class="wp-block-heading" id="h-genes-behind-oversized-cichlid-lips">Genes behind oversized cichlid lips</h2>



Scientists also noted changes in genes involved in the Wnt signaling network (a complex network of proteins that plays a critical role in how cells grow, divide, move, and develop. 



It’s especially important during embryonic development, but it also helps maintain and repair tissues in adults). This pathway influences a wide array of growth and developmental processes in many animals.



Some cichlids with oversized lips showed heightened expression of Wnt-related genes at both juvenile and adult stages. This suggests the pathway may stay active over time, nudging tissues to expand and accumulate more extracellular material.



<h2 class="wp-block-heading" id="h-tissue-connection-mirrors-human-biology">Tissue connection mirrors human biology</h2>



Recent findings have drawn an unexpected link between the oversized lips of cichlids and conditions seen in humans. The same proteoglycans found in fish lips are also involved in human skin disorders like <a href="https://my.clevelandclinic.org/health/diseases/keloid-scar" target="_blank" rel="noreferrer noopener">keloids</a>, where excess connective tissue causes raised, fibrous scars.



In both <a href="https://www.earth.com/news/worlds-oldest-fish-coelacanth-presumed-extinct-for-60-million-years-before-rediscovery/" target="_blank" rel="noreferrer noopener">fish</a> and humans, these molecules seem to attract and hold large amounts of water, helping tissues expand. Researchers believe that understanding how these proteins behave in cichlids may offer new insights into how connective tissues grow - or overgrow - in other animals, including us.



<h2 class="wp-block-heading" id="h-possible-role-in-cichlid-feeding">Possible role in cichlid feeding</h2>



Biologists have long debated the ecological benefits of bulky lips. Past <a href="https://pubmed.ncbi.nlm.nih.gov/8025722/" target="_blank" rel="noreferrer noopener">work</a> suggests these lips might help fish probe rocky crevices or minimize tissue damage as they forage.&nbsp;



Another line of research hints that extra lip surface could boost contact with environmental cues. This might aid in locating prey, which would be especially useful in the maze-like habitats of the African Great Lakes.



<h2 class="wp-block-heading" id="h-why-not-all-cichlids-have-big-lips">Why not all cichlids have big lips</h2>



Despite the shared environments of the East African Great Lakes, not every cichlid <a href="https://www.earth.com/news/fish-evolve-rapidly-by-switching-between-simple-and-complex-teeth/" target="_blank" rel="noreferrer noopener">species</a> ends up with hypertrophied lips. That’s because this trait appears to be polygenic, meaning it depends on many <a href="https://www.earth.com/news/can-we-fix-faulty-genes-before-birth/" target="_blank" rel="noreferrer noopener">genes</a> working together - each with a small influence.



Environmental pressures like foraging style or diet likely interact with genetic tendencies. In species where the benefit of thick lips isn’t strong enough, the genes driving lip growth may remain quiet or develop differently, even if the molecular tools are present.



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



Genetic studies have pinpointed multiple points in the cichlid genome that may influence lip thickness. Each locus seemingly offers a small push toward fuller lips, forming a broad and complex mechanism for the trait.&nbsp;



Investigations into parallels between enlarged fish lips and certain human connective tissue conditions have also started. Some scientists hope comparisons might clarify how <a href="https://www.earth.com/news/organic-molecules-collagen-discovered-in-66-million-year-old-dinosaur-bones/" target="_blank" rel="noreferrer noopener">collagen</a> and other structural molecules work in different organisms over many generations.



The study is published in the journal <a href="https://elifesciences.org/articles/99160" target="_blank" rel="noreferrer noopener">eLife</a>.



-----



Like what you read?<a href="https://www.earth.com/subscribe/"> Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;



Check us out on<a href="https://www.earth.com/earthsnap/"> EarthSnap</a>, a free app brought to you by<a href="https://www.earth.com/author/eralls/"> Eric Ralls</a> and Earth.com.



-----

The molecular secret behind the giant lips of African cichlids

Over the years, aquarists and biologists have marveled at the dramatically thick lips of several African cichlid species. These unique fish, found in lakes Victoria, Malawi, and Tanganyika, have puzzled researchers who seek to understand how and why such large lips evolved. This fascination has led to fresh investigations by scientists comparing lip structures, tissue composition, and gene expression in these fish. The research effort is led by Dr. Nagatoshi Machii from the Tokyo Institute of Technology, whose group has examined microscopic details and molecular data to...

Efforts to protect birds from the growing impacts of climate change may be missing a key piece of the puzzle. According to new research, understanding the specific climate conditions that birds need to survive - known as their climatic niche breadth - could be crucial for identifying which species are at greatest risk.



Scientists from the <a href="https://www.uea.ac.uk/" target="_blank" rel="noreferrer noopener">University of East Anglia</a> analyzed data from 159 <a href="https://www.earth.com/news/european-breeding-birds-adapt-to-climate-change-at-a-slower-pace/" target="_blank" rel="noreferrer noopener">European bird species</a> to explore how a species' tolerance to different temperatures and rainfall patterns relates to its population trends. 



The researchers analyzed four decades of bird population data across 29 countries, combined with 30 years of climate information, to measure how adaptable each species is to a variety of conditions within its habitat.



<h2 class="wp-block-heading" id="h-even-common-birds-face-climate-risks">Even common birds face climate risks</h2>



It’s widely assumed that <a href="https://www.earth.com/news/rare-birds-diving-petrels-return-home-island-conservation-efforts/" target="_blank" rel="noreferrer noopener">rare birds</a> or those with small geographic ranges are most vulnerable to climate change. However, new findings suggest that a bird’s vulnerability isn’t solely about how widespread it is. What seems to matter more is how broad - or narrow - the range of climate conditions a species can handle is.



“Deciding which species are more at risk isn’t straight forward, and species may be declining for a range of reasons,” said lead author Karolina Zalewska, a postgraduate researcher in UEA’s School of Environmental Sciences.



“Rare species and those that have smaller distributions are more likely to be vulnerable to climate change. This study has shown that birds that are more widespread, such as the <a href="https://www.earth.com/news/tiny-but-mighty-the-significance-of-world-sparrow-day/" target="_blank" rel="noreferrer noopener">house sparrow</a> and the common starling, can also face threats to their populations."



"Species, whether rare or widespread, with narrower climatic niches may be more susceptible to the rapid changes brought on by climate change compared to those with broader niches, and this may be one of the underlying reasons behind the population declines observed."



<h2 class="wp-block-heading" id="h-birds-with-narrow-climate-ranges">Birds with narrow climate ranges</h2>



According to Zalewska, the results emphasize the importance of understanding and incorporating the level of exposure to climatic variability when assessing vulnerability to climate change and long-term population declines.



The study confirmed that a bird’s ability to cope with a variety of climate conditions is strongly linked to its population stability. Even among species with similar geographic ranges, those with narrower climate tolerances were more likely to be in decline.



“Faced with the challenges of the <a href="https://www.earth.com/news/global-biodiversity-crisis-is-actually-worse-than-we-thought/" target="_blank" rel="noreferrer noopener">global biodiversity crisis</a> and climate change, the rapid assessment of species vulnerability to environmental change has become of paramount importance to address priorities for conservation," said co-author Professor Aldina Franco.



"As climate change accelerates, our study highlights the need to prioritize species that are most at risk due to their more restricted environmental requirements.”



<h2 class="wp-block-heading" id="h-a-better-way-to-assess-risk">A better way to assess risk</h2>



The team used their climate data to develop a new index - climatic niche breadth adjusted for range area - that can help predict which birds are more vulnerable to environmental change. This index, combined with data on diet, body size, primary habitat, and <a href="https://www.earth.com/news/migratory-behaviors-are-shaped-by-experience/" target="_blank" rel="noreferrer noopener">migratory behavior</a>, offers a more complete picture of each species' resilience.



“These findings can help us understand the threats associated with climate change and allow for rapid assessment of the importance of climatic factors on population trends, providing an invaluable tool for targeting species conservation,” said Zalewska.



“In particular, we show that the climatic niche breadth to range area index can help predict which species may be more vulnerable to population declines.”



Out of the 159 species examined, 58 were found to be declining, 68 remained stable, and 33 were increasing. 



Birds that inhabit farmland - such as corn buntings and skylarks - were more likely to be in decline. By contrast, species more comfortable in human-altered landscapes, like blackbirds and blue tits, were faring better.



<h2 class="wp-block-heading" id="h-conservation-through-a-climate-lens">Conservation through a climate lens</h2>



The research offers a way forward for conservation strategies in an era of accelerating climate change. 



Instead of relying solely on range size or rarity, conservationists may need to look more closely at how birds respond to different climates across their range.



Recognizing which species are climate-sensitive could make all the difference in keeping their populations from slipping away.



The full study was published in the journal <a href="https://onlinelibrary.wiley.com/doi/10.1111/jbi.15127" target="_blank" rel="noreferrer noopener">Journal of Biogeography</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;



Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.earth.com/author/eralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.



-----

Some birds are more at risk from climate change than others

Efforts to protect birds from the growing impacts of climate...

Dogs have long been recognized for their remarkable ability to detect faint scents associated with various diseases. 



From identifying cancer and low blood sugar to sensing infections, their keen noses have inspired trainers to develop specialized tasks that enhance safety and independence for people managing health conditions.



Scientists recently <a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0320158" target="_blank" rel="noreferrer noopener">discovered</a> new connections between how dogs interpret ambiguous situations and how they tackle scent detection tasks.



The research was led by Sharyn Bistre Dabbah of the <a href="https://www.bristol.ac.uk" target="_blank" rel="noreferrer noopener">University of Bristol</a>, who explored whether a dog’s upbeat or doubtful attitude influences how well it can sniff out important odor cues.



<h2 class="wp-block-heading" id="h-how-dogs-learn-medical-scent-detection">How dogs learn medical scent detection</h2>



<a href="https://www.medicaldetectiondogs.org.uk/" target="_blank" rel="noreferrer noopener">Medical detection dogs</a> have earned respect among healthcare professionals, especially for their role in identifying certain <a href="https://bmcinfectdis.biomedcentral.com/articles/10.1186/s12879-020-05281-3" target="_blank" rel="noreferrer noopener">diseases</a> and assisting people with chronic issues. 



They are trained to detect unique scent markers in clinical samples or to warn someone about an imminent change in health status.



Training starts young, using exercises to boost focus and confidence in new environments. The programs highlight gentle yet consistent methods that reward a dog for accurate performance and reduce confusion through repetition.



Because tasks based on scent detection are demanding, these <a href="https://www.earth.com/news/pet-dogs-severely-harm-wildlife-even-when-leashed/" target="_blank" rel="noreferrer noopener">canines</a> must learn to keep calm under pressure. They must stay determined and engaged through repeated trials, which can be challenging for some dogs. Despite these challenges, many dogs handle the work with remarkable ease.



When some dogs show more precision and fewer false alerts, experts start searching for the reasons why. If these traits can be identified early, it could bring more certainty to an already impressive field.



<h2 class="wp-block-heading" id="h-connecting-optimism-and-performance">Connecting optimism and performance</h2>



One experimental approach used in this research is <a href="https://pubmed.ncbi.nlm.nih.gov/26440495/" target="_blank" rel="noreferrer noopener">judgment bias testing</a>, a strategy for gauging how animals respond to uncertain situations. 



Dogs learn a bowl in one spot with a known scent means a reward, but in another spot, it doesn't. When the bowl appears in a middle spot, the <a href="https://www.earth.com/news/are-dogs-replacing-children-how-modern-society-is-changing/" target="_blank" rel="noreferrer noopener">canines</a>’ reaction time can hint at their emotional outlook.



“Dogs that approached ambiguous cues more quickly - indicative of ‘optimism' - were associated with higher levels of traits such as confidence and playfulness. These insights could have important implications for training and selection methods in medical detection dogs,” said Dabbah.



In plain terms, dogs that zipped toward the bowl, hoping it held a tasty morsel, also seemed to have strong overall abilities when it came to learning and focusing. They appeared quicker to embrace new tasks and bounced back from empty bowls without getting flustered.



At the same time, some <a href="https://www.earth.com/news/more-than-99-of-dogs-in-the-u-s-have-a-behavior-problem/" target="_blank" rel="noreferrer noopener">canines</a> showed a more guarded approach. They paused a moment longer at uncertain bowl placements, almost as if they were doing a double-check before taking action.



Interestingly, these dogs often had fewer false positives, indicating that a degree of “cautious thinking” may reduce errors.



<h2 class="wp-block-heading" id="h-optimistic-dogs-and-scent-detection">Optimistic dogs and scent detection</h2>



Older dogs showed signs of calm confidence, which might help them approach tricky tasks without wasting energy on confusion. It is possible that time in training leads to more measured responses, as dogs hone both their search skills and emotional stability.



Dogs with a high drive for food did not hesitate to check a bowl, reflecting an eagerness to score a reward. While that can propel a dog to excel in learning, it may lead to hasty alerts on non-target scents. Balancing that enthusiasm with steady caution can be a challenge.



Some dogs leaned on playfulness to make tasks more pleasant. Tail-wagging and enthusiasm can boost training, but too much excitement may disrupt focused sniffing. Striking a middle ground is ideal for daily practice.



When a trainer recognizes that a dog’s personality tends toward optimism, that knowledge can guide how training is structured. The approach may focus on channeling the dog’s quick reactions while refining its ability to stop and think when necessary.



<h2 class="wp-block-heading" id="h-optimistic-dogs-have-greater-detection-ability">Optimistic dogs have greater detection ability</h2>



“Our findings suggest that dogs displaying more ‘optimistic’ responses in a judgment bias test tend to demonstrate higher overall ability, as rated by their trainers. Understanding this link could help us to better train, select, and support successful medical detection dogs,” said Dabbah.



Some of the more reserved dogs achieved stronger scent specificity, which can be a valuable quality for tasks where false alarms carry greater cost. Training might then look for ways to add a dash of positive expectation to help these dogs stay motivated.



Moving ahead, experts are exploring whether these insights might hint at early screening tools. Dogs that have an optimistic streak could be strong candidates for highly active detection tasks.



Such early indicators might spare time and resources, enabling trainers to focus on dogs whose personality suits the intensity of constant sniffing and monitoring. 



Research suggests this approach may also enhance the dog’s well-being, as training can be fine-tuned to match its natural tendencies.



<h2 class="wp-block-heading" id="h-the-future-of-dog-training">The future of dog training</h2>



Trainers often keep logs of each dog’s progress and note any unusual struggles. A quick emotional test could add insight into what drives each dog’s successes and setbacks



Dog organizations might use these new findings to perfect selection programs. Dogs that see gray areas as opportunities often recover quickly from setbacks, making training more enjoyable.



The broader community of working-dog enthusiasts is always on the lookout for ways to elevate standards in canine professions. 



By evaluating how optimism or hesitation shapes detection tasks, it may be possible to maximize performance without pushing dogs beyond healthy limits.



Refining this process promises a better match between each dog’s inherent scent style and the tasks they are asked to tackle. Such harmony could improve the reliability of medical alerts while protecting the dog’s quality of life.



The study is published in the journal <a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0320158" target="_blank" rel="noreferrer noopener">PLOS One</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;



Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.earth.com/author/eralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.



-----

Good mood, sharper nose? Optimistic dogs excel in scent detection

Dogs have long been recognized for their remarkable ability to...

The idea that extreme heat could one day cause a mass extinction and end the dominance of humans and other mammals might sound like something out of sci-fi movie.



Yet new findings indicate that the planet might face this crisis if continents fuse into one landmass. Some researchers say it could be the first extinction of its kind since the dinosaurs vanished.



In a recent study, investigators used powerful climate models to show how a future supercontinent, called Pangea Ultima, might alter global conditions. Projections suggest a much hotter and drier environment with limited options for survival.



The work appears in Nature Geoscience and was led by Dr. Alexander Farnsworth, a Senior Research Associate at the <a href="https://www.bristol.ac.uk/" target="_blank" rel="noreferrer noopener">University of Bristol</a>. His team examined tectonic plate movement, solar changes, and greenhouse gas levels.



<h2 class="wp-block-heading" id="h-pangea-ultima-the-next-supercontinent">Pangea Ultima - the next supercontinent</h2>



Geologists have long argued that <a href="https://www.earth.com/earthpedia-articles/supercontinents-101-pannotia-gondwana-and-pangea/" target="_blank" rel="noreferrer noopener">Earth’s continents</a> move gradually over time. Pangea Ultima is the name given to the hypothesized supercontinent that might emerge millions of years from now. 



If this happens, much of the terrain would sit far from oceanic cooling influences, a situation known as the continentality effect.



“The newly-emerged supercontinent would effectively create a triple whammy, comprising the continentality effect, hotter sun and more <a href="https://www.earth.com/news/possible-to-permanently-remove-co2-carbon-dioxide-from-atmosphere-water-storage/" target="_blank" rel="noreferrer noopener">CO₂ in the atmosphere</a>, of increasing heat for much of the planet,” Dr. Farnsworth explained.



<h2 class="wp-block-heading" id="h-three-drivers-of-human-extinction">Three drivers of human extinction</h2>



One factor is the expansive landmass itself, which traps regions in scorching interiors. 



Another is that the sun will brighten over time, delivering stronger radiation. Volcanic activity adds more carbon dioxide to the mix, further <a href="https://www.earth.com/news/climate-experts-predict-global-warming-will-far-exceed-paris-goals/" target="_blank" rel="noreferrer noopener">warming the atmosphere</a>.



“Widespread temperatures of between 40 to 50° Celsius (104 to 122° Fahrenheit), and even greater daily extremes, compounded by high levels of humidity, would ultimately seal our fate,” Dr. Farnsworth added. 



“Humans - along with many other species - would expire due to their <a href="https://www.earth.com/news/humans-have-a-lower-heat-tolerance-than-expected/" target="_blank" rel="noreferrer noopener">inability to shed this heat</a> through sweat, cooling their bodies.” 



With the sun also anticipated to emit about 2.5% more radiation and the supercontinent being located primarily in the hot, humid tropics, much of the planet could be facing temperatures of between 40 to 70°C (104 to 158°F).



<h2 class="wp-block-heading" id="h-impact-on-other-mammals">Impact on other mammals</h2>



Researchers note that mammals have historically endured shifts in temperature, sometimes by growing thicker coats in cold climates or relying on hibernation. 



Yet sustained heat is harder to escape, since sweating is essential for body cooling. As conditions climb, mammals cannot regulate heat for long without access to cooler refuges and reliable water sources.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2024/11/Pangea-Ultima_supercontinent_illustration_UBristol_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/Pangea-Ultima_supercontinent_illustration_UBristol_1s.webp" alt="Illustration showing the geography of today’s Earth and the projected geography of Earth in 250 million years, when all the continents converge into one supercontinent (Pangea Ultima). Credit: University of Bristol" class="wp-image-1965317"/></a><figcaption class="wp-element-caption">Illustration showing the geography of today’s Earth and the projected geography of Earth in 250 million years, when all the continents converge into one supercontinent (Pangea Ultima). Click image to enlarge. Credit: University of Bristol</figcaption></figure>



Study findings hint that only 8% to 16% of land on the future supercontinent would stay within a tolerable range. 



Dryness complicates matters by limiting <a href="https://www.earth.com/news/world-water-day-2025-preserving-glaciers-protecting-our-future/" target="_blank" rel="noreferrer noopener">water supplies</a> and reducing vegetation. With so much territory turning arid, the quest for food and hydration would become daunting.



<h2 class="wp-block-heading" id="h-humans-should-heed-extinction-warnings">Humans should heed extinction warnings</h2>



“It is vitally important not to lose sight of our current <a href="https://www.earth.com/news/climate-crisis-global-supply-chains-face-25-trillion-in-losses/" target="_blank" rel="noreferrer noopener">Climate Crisis</a>, which is a result of human emissions of greenhouse gases,” urged co-author Dr. Eunice Lo, Research Fellow in Climate Change and Health at the University of Bristol. 



“While we are predicting an uninhabitable planet in 250 million years, today we are already experiencing extreme heat that is detrimental to human health. This is why it is crucial to reach <a href="https://www.earth.com/news/limiting-global-warming-to-1-5c-is-almost-certainly-out-of-reach/" target="_blank" rel="noreferrer noopener">net-zero emissions</a> as soon as possible.”



Recent decades have seen rising temperatures that strain resources. Heat waves threaten crops, disrupt energy grids, and place communities at risk. 



Many call for faster <a href="https://www.earth.com/news/beef-industry-can-cut-emissions-by-30-with-sustainable-practices/" target="_blank" rel="noreferrer noopener">emission cuts</a> to prevent even harsher conditions. Some experts believe effective policies and public awareness could still temper the worst near-term damage.



<h2 class="wp-block-heading" id="h-future-carbon-dioxide-levels">Future carbon dioxide levels</h2>



Projections in the study used tectonic and ocean chemistry models to gauge carbon dioxide levels. 



Higher volcanic outgassing over the coming eons points to an increase from current readings to well above 600 parts per million. Such elevated concentrations would create conditions hostile to many organisms.



<a href="https://www.earth.com/news/2023-climate-change-report-record-high-temperatures-greenhouse-gases-sea-level-rise/" target="_blank" rel="noreferrer noopener">Greenhouse gases</a> would accumulate and trap more heat in the atmosphere. This feedback loop amplifies warming, making survival increasingly difficult on a planet with minimal oceanic influence.



“We think CO₂ could rise from around 400 parts per million (ppm) today to more than 600 ppm many millions of years in the future,” noted Professor Benjamin Mills at the <a href="https://www.leeds.ac.uk/" target="_blank" rel="noreferrer noopener">University of Leeds</a>. 



“Of course, this assumes that humans will stop burning fossil fuels, otherwise we will see those numbers much, much sooner.”



<h2 class="wp-block-heading" id="h-remembering-past-extinction-events">Remembering past extinction events</h2>



Many eras of Earth’s history ended in severe biodiversity loss. 



About 443 million years ago, marine habitats shrank during the <a href="https://www.earth.com/news/fossil-sue-keurbos-susanae-reveals-444-million-year-old-anatomy-of-ancient-arthropod/" target="_blank" rel="noreferrer noopener">Ordovician-Silurian Extinction</a>, removing roughly 85% of sea life. 



Near 360 million years ago, the <a href="https://www.earth.com/news/at-least-two-of-earths-mass-extinctions-caused-by-massive-supernova-explosions/" target="_blank" rel="noreferrer noopener">Late Devonian</a> wiped out up to 75% of species. Later came the Permian-Triassic Extinction about 252 million years ago, erasing over 90% of marine species and 70% on land.



Around 200 million years ago, massive eruptions drove the Triassic-Jurassic Extinction, cutting species by around half. 



Some 66 million years ago, an asteroid impact ended the non-avian dinosaurs in the <a href="https://www.earth.com/news/mammals-ground-dwellers-survived-the-asteroid-impact-that-killed-the-dinosaurs/" target="_blank" rel="noreferrer noopener">Cretaceous-Paleogene Extinction</a>, eliminating about 75% of all species.



<h2 class="wp-block-heading" id="h-human-extinction-and-exoplanets">Human extinction and exoplanets</h2>



This analysis also broadens how scientists evaluate exoplanets. If continents merge, planetary heat can spike, even if a world is inside a so-called habitable zone. 



Researchers think other planets might face analogous shifts, where tectonic movement and solar intensity escalate temperatures. Rotation rates and air chemistry may further affect habitability.



“This work also highlights that a world within the so-called ‘<a href="https://www.earth.com/news/study-expands-the-habitable-zone-where-we-may-find-alien-life/" target="_blank" rel="noreferrer noopener">habitable zone</a>’ of a solar system may not be the most hospitable for humans depending on whether the continents are dispersed, as we have today, or in one large supercontinent,” Dr. Farnsworth concluded. 



“Understanding these configurations can guide experts who look for environments that support life beyond Earth.”



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



Today, we already see the impact of climate stress on our resources and health. Scientists warn us that higher temperatures and more extreme weather events could become the norm if we fail to manage our emissions. 



While the prospect of a distant supercontinent meltdown might seem remote, it underscores the importance of taking meaningful steps now.



The full study was published in the journal&nbsp;<a href="https://www.nature.com/articles/s41561-023-01259-3" target="_blank" rel="noreferrer noopener">Nature Geoscience</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.



Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.earth.com/author/eralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.



-----

Study predicts how and when humans and mammals will face extinction

The idea that extreme heat could one day cause a...

Twelve million years ago, vast herds of rhinoceroses grazed the lush grasslands of what is now the North American Midwest. These barrel-bodied creatures - ancient rhinos known as Teleoceras major - flourished across the region, often gathering in large numbers near waterholes.



Today, a new <a href="https://www.uc.edu/news/articles/2025/04/uc-study-finds-evidence-that-prehistoric-rhinos-lived-in-huge-herds.html">study</a> from the University of Cincinnati (<a href="https://www.uc.edu/?utm_source=gmb&amp;utm_medium=organic" target="_blank" rel="noreferrer noopener">UC</a>) reveals they weren’t just occasional visitors to these sites - they likely lived and died in close-knit herds, much like modern hippos.



As a result, the research sheds new light on one of North America's most extraordinary fossil sites: Ashfall Fossil Beds State Historical Park in northeast Nebraska. 



Over 100 rhinoceroses left fossilized remains at this site, along with camels, horses, and other animals - all of which perished in the aftermath of a massive <a href="https://www.earth.com/news/giant-viruses-found-in-yellowstones-hot-springs-are-1-5-billion-years-old/" target="_blank" rel="noreferrer noopener">Yellowstone</a> supervolcano eruption.



<h2 class="wp-block-heading" id="h-unraveling-an-ancient-rhino-mystery">Unraveling an ancient rhino mystery</h2>



Since the park’s discovery in 1971, scientists have puzzled over why so many animal,s including rhinoceroses, were found clustered in the same place. Did they come from miles away, fleeing the growing disaster of falling ash? Or had they been living there all along?



“We found they didn’t move very much,” said Clark Ward, lead author of the study and a UC graduate. “We didn’t find evidence for seasonal migration or any evidence of a response to the disaster.”



<h2 class="wp-block-heading" id="h-clues-from-rhino-teeth">Clues from rhino teeth</h2>



Ward, now a doctoral student at the <a href="https://twin-cities.umn.edu/" target="_blank" rel="noreferrer noopener">University of Minnesota</a>, used isotopic analysis of fossilized ancient rhino teeth to track their movements and environmental conditions.&nbsp;



With guidance from co-authors and advisers Brooke Crowley at UC and Ross Secord at the <a href="https://nebraska.edu/" target="_blank" rel="noreferrer noopener">University of Nebraska</a>, Ward analyzed ratios of strontium, oxygen, and carbon isotopes - atomic fingerprints that can reveal everything from diet and rainfall to landscape use.



“By studying carbon in the animal, we can reconstruct carbon in the environment to understand what kinds of vegetation lived there,” Ward explained.



“We can use [oxygen] to reconstruct how wet or dry the environment was,” he added. “And strontium tells us where the animal was foraging because the ratio of isotopes is related to the soil and supporting bedrock.”



Together, these isotopic clues suggest the rhinos were long-term residents of the area, not migrants drawn by a <a href="https://www.earth.com/news/natural-disasters-are-on-the-rise-but-hazard-plans-are-inadequate/" target="_blank" rel="noreferrer noopener">natural disaster</a> or seasonal food shifts. It appears they simply lived - and ultimately died - in the place they called home.



<h2 class="wp-block-heading" id="h-a-supervolcano-s-lethal-reach">A supervolcano’s lethal reach</h2>



The mass death was triggered by ash from one of Yellowstone’s ancient <a href="https://www.earth.com/news/yellowstone-supervolcano-eruption-study-sparks-new-debate-on-where-and-when-it-will-erupt/" target="_blank" rel="noreferrer noopener">supervolcano</a> eruptions. The Yellowstone hotspot has erupted often over 12 million years, spreading ash hundreds of miles away.



“That ash would have covered everything - the grass, leaves, and water,” Ward said. “The rhinos likely weren’t killed immediately, like the people of Pompeii. Instead, it was much slower. They were breathing in the ash, and they likely starved to death.”



In contrast to the sudden catastrophe of volcanic pyroclastic flows, which instantly buried victims in ancient cities like Pompeii, the Ashfall rhinos suffered a slower, agonizing fate.



The ash settled into the landscape like snow, rendering food and water sources toxic or unusable. Over time, the animals succumbed to inhalation of ash and eventual starvation.



Fossils show scavenging by bone-crushing dogs, which came after the animals died. Ancient tracks from these 100-pound carnivores, along with tooth marks on bones, support this conclusion.



<h2 class="wp-block-heading" id="h-social-creatures-in-ancient-herds">Social creatures in ancient herds</h2>



Teleoceras major was a one-horned rhino with a short, squat body and stubby legs. Like <a href="https://www.earth.com/news/missing-data-on-hippos-could-push-them-closer-to-extinction/" target="_blank" rel="noreferrer noopener">hippos</a>, these rhinoceroses were grazers who likely spent much of their lives near water. Their massive size offered protection from predators, but their calves would have been vulnerable to attack.



The study’s findings have answered one long-standing question: Did these rhinos live alone or in groups? The presence of so many individuals, including adults and juveniles, supports the idea of herd behavior.



Rhino expert John Payne, who spent his career working with Sumatran rhinos in Malaysia, said the conclusion fits the species’ biology.



“I am not surprised that the analyses very strongly suggest that Teleoceras major lived in herds, given that this animal resembles the modern hippopotamus in form, and hippos live in herds of several tens of animals - with several herds in one geographical area,” Payne said.



<h2 class="wp-block-heading" id="h-science-comes-full-circle">Science comes full circle</h2>



For Ward, the study has a personal significance. As a child, he visited Ashfall Fossil Beds and later returned as an intern to help with fossil preparation and visitor education.



Now, his name is attached to groundbreaking research from the same site that once inspired his curiosity.



“I’m honored and privileged to have my name in science attached to the site,” he said. “As someone who used to go to Ashfall as a kid, it’s come full circle.”



<h2 class="wp-block-heading" id="h-broader-implications-of-the-study">Broader implications of the study</h2>



Though Teleoceras major is extinct, studies like this reveal ancient ecosystems and modern species’ responses to threats.



The broader implications of the research go beyond rhinoceroses. By studying how ancient animals responded to environmental change, scientists can better predict the impact of climate disruptions today. 



Whether it’s ash, mercury, or climate change, the past remains a vital key to our future.



The study is published in the journal <a href="https://www.nature.com/articles/s41598-025-94263-z" target="_blank" rel="noreferrer noopener">Nature Scientific Reports</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.



Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.



-----

Ancient graveyard reveals that rhinos once lived in 'super-herds'

Twelve million years ago, vast herds of rhinoceroses grazed the...

In 1962, environmentalist Rachel Carson galvanized public concern with her book Silent Spring, which warned of the reproductive dangers posed by DDT - particularly to birds like the bald eagle. Now, six decades later, scientists are sounding the alarm again, and this time the focus is on mercury contamination. 



Once more, birds are the primary concern - specifically, penguins living on the icy fringes of Antarctica.



“With <a href="https://www.earth.com/news/mercury-emissions-from-human-activities-are-declining/" target="_blank" rel="noreferrer noopener">mercury</a>, there’s an analogy to DDT,” said John Reinfelder, professor of environmental sciences at <a href="https://www.rutgers.edu/" target="_blank" rel="noreferrer noopener">Rutgers University</a> and co-author of a new study.&nbsp;



“In the 1960s, we were discovering <a href="https://www.earth.com/news/toxic-legacy-decades-old-ddt-found-in-deep-sea-fish/" target="_blank" rel="noreferrer noopener">DDT</a> in remote places where it wasn’t being used. It’s a similar story today with mercury. There are no human sources near the Southern Ocean, but because of long-distance transport through the atmosphere, it has the potential to accumulate in penguins.”



<h2 class="wp-block-heading" id="h-global-reach-of-mercury-contamination">Global reach of mercury contamination</h2>



Mercury is a potent neurotoxin that builds up in the food chain, especially in aquatic ecosystems. <a href="https://www.earth.com/news/steller-sea-lions-threatened-by-rising-mercury-levels/" target="_blank" rel="noreferrer noopener">Fish-eating animals</a> - including penguins - are at high risk. Chronic exposure can impair reproduction and damage the nervous system. In high enough doses, mercury contamination is lethal.



To understand how far mercury has traveled - and how much has made it into remote food chains - Reinfelder and Rutgers postdoctoral researcher Philip Sontag analyzed feathers from three penguin species collected on Anvers Island in the West Antarctic Peninsula.&nbsp;



The feathers, taken during the 2010–2011 breeding season, were gathered by William Fraser of the <a href="http://holtzmanwildlifefoundation.org/project/polar-oceans-research-group" target="_blank" rel="noreferrer noopener">Polar Oceans Research Group</a>. Due to agricultural safety regulations, the samples remained in storage for over a decade before they could be analyzed.



<h2 class="wp-block-heading" id="h-mercury-contamination-in-penguins">Mercury contamination in penguins</h2>



The team measured not only mercury concentrations, but the isotopic signatures of carbon-13 and nitrogen-15 in the feathers. 



These isotopes offer important clues: carbon-13 reveals where a penguin has been feeding, while nitrogen-15 indicates its position in the food chain. Together, these data points help pinpoint both the source and degree of mercury exposure.



Adelie and gentoo penguins showed relatively low mercury levels - among the lowest recorded in Southern Ocean penguins. <a href="https://www.earth.com/news/chinstrap-penguins-take-over-10000-micro-sleeps-per-day/" target="_blank" rel="noreferrer noopener">Chinstrap penguins</a>, however, stood out with significantly higher levels.



<h2 class="wp-block-heading" id="h-learning-more-about-penguin-ecology">Learning more about penguin ecology</h2>



Sontag believes their feeding behavior explains the difference in mercury contamination among penguin species. 



Unlike the other two species, chinstraps tend to migrate to lower latitudes during the winter, where mercury levels are higher.



“These data give us a way to learn not only about mercury accumulation, but about penguin ecology more broadly,” Reinfelder said.



The finding is also notable because it’s the first study to identify carbon-13 - not nitrogen-15 - as the stronger predictor of mercury levels in penguins across the Southern Ocean.



<h2 class="wp-block-heading" id="h-mercury-contamination-lingers">Mercury contamination lingers</h2>



Although mercury emissions from coal-fired power plants have decreased thanks to global efforts like the <a href="https://www.epa.gov/international-cooperation/minamata-convention-mercury" target="_blank" rel="noreferrer noopener">Minamata Convention on Mercury</a> - signed by 140 countries in 2013 - mercury is still being released into the environment, especially through small-scale gold mining.&nbsp;



In many developing regions, miners use elemental mercury to extract gold from ore. This releases over 1,000 tons of the toxin each year into air, water, and soil.



A recent <a href="https://www.mit.edu/" target="_blank" rel="noreferrer noopener">MIT</a> <a href="https://www.pnas.org/doi/10.1073/pnas.2401950121" target="_blank" rel="noreferrer noopener">study</a> found that atmospheric mercury levels dropped by 10% from 2005 to 2020, a promising trend largely attributed to the decline of coal-burning power stations. But mercury already in the environment can linger, circulating through the ocean’s vast <a href="https://www.earth.com/news/weakening-ocean-currents-could-cost-trillions-of-dollars/" target="_blank" rel="noreferrer noopener">currents</a> and entering food webs in even the most isolated regions of the planet.



“Just like DDT in the 1960s, the scientific community today is focused on monitoring mercury,” Reinfelder said. “Are we going to see a decrease in levels in the fish that people and animals eat? That's the hope.”



<h2 class="wp-block-heading" id="h-penguins-as-pollution-sentinels">Penguins as pollution sentinels</h2>



For researchers, penguins are more than charismatic wildlife - they are living indicators of global pollution including that of mercury contamination. Their feathers provide a snapshot of the environments they’ve traveled through and the toxins they’ve absorbed.



Sontag and Reinfelder’s findings add a new layer to our understanding of how pollutants like mercury travel through ecosystems. By linking penguin foraging behaviors with their mercury burden, the study offers both a warning and a call to action.



“Before this study, we didn't know that penguins migrating farther north had higher exposures to mercury,” Reinfelder noted.



In a world still grappling with the consequences of industrial pollution, these birds are once again showing us what’s at stake.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/abs/pii/S004896972405304X?via%3Dihub" target="_blank" rel="noreferrer noopener">Science of the Total Environment</a>.



-----



Like what you read?<a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener"> Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.



Check us out on<a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener"> EarthSnap</a>, a free app brought to you by<a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener"> Eric Ralls</a> and Earth.com.



-----

Penguins are threatened by mercury contamination

In 1962, environmentalist Rachel Carson galvanized public concern with her...

Dinosaurs might not have been on the verge of extinction before an asteroid wiped them out 66 million years ago.&nbsp;



New research led by scientists at <a href="https://www.ucl.ac.uk/" target="_blank" rel="noopener">University College London</a>&nbsp;(UCL) challenges the idea that <a href="https://www.earth.com/news/strange-case-of-the-two-clawed-dinosaur-duonychus-tsogtbaatari/" target="_blank" rel="noreferrer noopener">dinosaur</a> species gradually declined. Instead of a real drop in biodiversity, the study suggests that gaps in the fossil record might better explain this lack of specimens.



These findings question a decades-old assumption that dinosaurs were dwindling even before the catastrophic impact that ended the Cretaceous period.



<h2 class="wp-block-heading" id="h-reexamining-dinosaur-extinction">Reexamining dinosaur extinction</h2>



The team studied more than 8,000 dinosaur fossils from North America. They focused on the last 18 million years before the <a href="https://www.earth.com/news/asteroid-chicxulub-caused-dinosaurs-extinction-event-traced-to-origin-kuiper-belt/" target="_blank" rel="noreferrer noopener">asteroid</a> hit. This is a window from 84 to 66 million years ago.



At first glance, the fossils show a steady drop in dinosaur diversity starting about 75 million years ago. The researchers believe this trend is misleading.



“It’s been a subject of debate for more than 30 years," said lead author Chris Dean from UCL’s Department of Earth Sciences.



"Were dinosaurs doomed and already on their way out before the asteroid hit? We analyzed the fossil record and found that the quality of the record of four groups of dinosaurs gets worse during the final 6 million years prior to the asteroid.”



In other words, the apparent drop in species may not reflect what was really happening before the sudden dinosaur extinction event. 



Instead, it may simply be that fossils from that time are harder to locate. Natural geological changes might have reduced where and how fossils could be preserved.



<h2 class="wp-block-heading" id="h-digging-into-the-data">Digging into the data</h2>



The researchers studied four major groups of dinosaurs: the Ankylosauridae (club-tailed armored herbivores), Ceratopsidae (like the iconic Triceratops), Hadrosauridae (duck-billed plant eaters), and Tyrannosauridae (apex predators like <a href="https://www.earth.com/news/t-rex-was-about-70-percent-bigger-than-we-thought/" target="_blank" rel="noreferrer noopener">T. rex</a>).



Using occupancy modeling (a method borrowed from ecology), they mapped where these dinosaurs likely lived across ancient North America. 



The experts broke the region into a grid and estimated the number of grid squares each group probably occupied at different points during the last 18 million years of the Cretaceous.



What they found was surprising. While the raw fossil data suggested fewer species, the modeling indicated that the dinosaur habitat range stayed largely consistent. 



This means that dinosaurs probably weren’t dying off, but that we are just not finding as many of their fossils.



<h2 class="wp-block-heading" id="h-fewer-rocks-fewer-clues">Fewer rocks, fewer clues</h2>



So why is the record so patchy near the end of the Cretaceous? The team argued it mostly comes down to geology.&nbsp;



Before the dinosaur extinction, North America experienced significant changes: sea levels fell, a large inland sea vanished, and mountain ranges rose.



As a result of these geologic shifts, much of the sediment that could have preserved fossils from that time is no longer exposed. It is also buried under vegetation, cities, and other obstacles.



This makes it harder for paleontologists to locate fossils from the period just before the asteroid.



“The probability of finding dinosaur fossils decreases, while the likelihood of dinosaurs having lived in these areas at the time is stable,” Dean said. “This shows we can’t take the fossil record at face value.”



<h2 class="wp-block-heading" id="h-one-dinosaur-group-stood-out">One dinosaur group stood out</h2>



Among the four dinosaur groups, Ceratopsians (the <a href="https://www.earth.com/news/dinosaur-with-huge-blade-like-horns-discovered-in-montana/" target="_blank" rel="noreferrer noopener">horned dinosaurs</a>) bucked the trend. They were more likely to be found in later layers of the fossil record. These animals also occupied more areas.



The researchers suggest this might be because Ceratopsians preferred open plains. The landscape was more widespread after the inland sea disappeared, and it was more likely to preserve fossils.



This ecological preference may have given them an edge in fossil preservation –&nbsp;not necessarily survival.



<h2 class="wp-block-heading" id="h-dinosaur-extinction-without-an-asteroid">Dinosaur extinction without an asteroid?</h2>



Alessandro Chiarenza, a co-author of the study, said the findings help reframe our understanding of dinosaur extinction.



“If we take the fossil record at face value, we might conclude dinosaurs were already experiencing a decline. But we show that this apparent decline is more likely a result of a reduced sampling window caused by geological changes," noted Chiarenza.



“Dinosaurs were probably not inevitably doomed to extinction at the end of the Mesozoic. If it weren’t for that asteroid, they might still share this planet with <a href="https://www.earth.com/news/mammals-ground-dwellers-survived-the-asteroid-impact-that-killed-the-dinosaurs/" target="_blank" rel="noreferrer noopener">mammals</a>, lizards, and their surviving descendants: birds.”



Thus, the research adds new weight to the idea that the asteroid impact was a cataclysmic fluke. It was not the final blow to an already dying group but the abrupt end to a thriving and diverse reign.



-----



Image credit: Reconstruction of a late Maastrichtian (~66 million years ago) paleoenvironment in North America, where a floodplain is roamed by dinosaurs like Tyrannosaurus rex, Edmontosaurus annectens and Triceratops prorsus. Davide Bonadonna



The study is published in the journal <a href="https://www.cell.com/current-biology/fulltext/S0960-9822(25)00310-0" target="_blank" rel="noreferrer noopener">Current Biology</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.



Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.



-----

Dinosaur extinction theories are challenged by new research

Dinosaurs might not have been on the verge of extinction...

When we envision sea turtles cruising through the ocean, we picture their streamlined shells - natural defenses seemingly built for protection.



However, these shells defend more than that. They allow sea turtles to slice through <a href="https://www.earth.com/news/beating-the-heat-how-sea-turtles-cope-with-warming-waters/" target="_blank" rel="noreferrer noopener">water</a>, plunge deep into the depths, and survive drastic changes in pressure when surfacing and then diving once more.



Each shell consists of two sections: the carapace above and the plastron below. Both are covered in scutes - tough keratin plates fused to bone



Internally, the architecture is similar to a sandwich: a tough outer shell and a spongy, lightweight interior. This architecture balances between strength with buoyancy while protecting vital organs.



<h2 class="wp-block-heading" id="h-a-closer-look-at-sea-turtle-shells">A closer look at sea turtle shells</h2>



Scientists from <a href="https://www.fau.edu/" target="_blank" rel="noreferrer noopener">Florida Atlantic University</a> set out to study what makes sea turtle shells so good at handling the pressures of life underwater. 



While freshwater turtles and land tortoises have been widely studied, marine turtles haven’t received as much attention.



To change that, the team focused on three North Atlantic sea turtle species: <a href="https://www.earth.com/news/reintroduction-of-green-turtles-has-been-a-success-in-the-cayman-islands/" target="_blank" rel="noreferrer noopener">green turtles</a> (Chelonia mydas), <a href="https://www.earth.com/news/loggerhead-turtles-migrate-using-a-secret-thermal-corridor/" target="_blank" rel="noreferrer noopener">loggerheads</a> (Caretta caretta), and Kemp’s ridleys (Lepidochelys kempii). 



The researchers used advanced compression tests and statistical models to explore how these turtles' shells perform at different stages of life - from <a href="https://www.earth.com/news/young-sea-turtles-swim-and-choose-their-paths-instead-of-drifting/" target="_blank" rel="noreferrer noopener">young turtles</a> to full-grown adults.



<h2 class="wp-block-heading" id="h-shell-strength-varies-but-toughness-remains">Shell strength varies, but toughness remains</h2>



The research, published in the Journal of Experimental Biology, showed sea turtle shells aren’t merely shields, but dynamic survival tools.



The researchers discovered that the shell’s bone structure maintains a vital balance: it’s flexible enough to absorb shock, but not so floppy as to be prone to damage. This balance enables sea turtles to remain agile in the water while fending off predators.



Surprisingly, each of the three species possesses the same type of shell, but respond in varying ways to pressure.



Green turtles possess the most rigid, powerful shells made from denser bone. Loggerheads, by contrast, have less dense, more elastic shells better adapted to flex without shattering.



These characteristics apparently mirror each species’ respective habitat and particular challenges it confronts. Even more surprising? The toughness of each species’ shell doesn’t change as the turtle grows.



“We believe this variation is likely a result of their evolution and the environments they inhabit,” said Ivana J. Lezcano, first author and doctoral student in the FAU Department of Biological Sciences within the Charles E. Schmidt College of Science. 



“The differences in shell stiffness across these species may be connected to their distinct life histories, with each <a href="https://www.earth.com/news/world-sea-turtle-day-celebrating-100-million-years-of-majesty/" target="_blank" rel="noreferrer noopener">species</a> adapting to unique environmental challenges and predation risks.”



<h2 class="wp-block-heading" id="h-growth-brings-greater-protection">Growth brings greater protection</h2>



In green turtles and Kemp’s ridleys, shells become stiffer and stronger as the turtles grow, giving them better protection as they age. 



Kemp’s ridleys experience this stiffening earlier in life, likely because they mature quickly and forage in riskier coastal waters.



“What’s fascinating is that their <a href="https://www.earth.com/news/turtles-have-genomes-unlike-any-other-animal/" target="_blank" rel="noreferrer noopener">shells</a> evolve to provide more protection over time,” said Lezcano. 



“The stiffness of juvenile green turtle shells may be especially important because their shells lack the protective spines and keels, which young loggerheads and ridleys sport to armor themselves against predators. It’s a dynamic interplay of form and function that ensures these turtles are built for survival.”



Loggerheads stood out for a different reason. Their shells don’t show a clear increase in stiffness as they grow. 



This slower change might be why they spend more time in the open ocean, where threats are fewer, before venturing closer to shore.



<h2 class="wp-block-heading" id="h-turtle-shell-flexibility-is-key">Turtle shell flexibility is key</h2>



The researchers also compared sea turtle shells to those of land turtles and found interesting similarities.



In both cases, the internal porous bone layer is key. It helps the shell resist crushing forces while staying light and somewhat flexible.



Study co-author Dr. Jeanette Wyneken is a professor of biological sciences at FAU’s Charles E. Schmidt College of Science.



“The shells of adult sea turtles are surprisingly compliant compared to their land relatives,” said Dr. Wyneken. "But here’s the cool part: while their shells become stronger over time, they don’t become completely rigid like the shells of land turtles. 



"This flexibility is key - because it enables them to ‘flex the shell’ under pressure, which is crucial for navigating the harsh and varying conditions of underwater environments.”



<h2 class="wp-block-heading" id="h-fine-tuning-through-evolution">Fine-tuning through evolution</h2>



The researchers believe their work sheds light on why sea turtles have lasted so long in the wild. 



Dr. Marianne Porter is an associate professor in the FAU Department of Biological Sciences and co-author of the study.



“Our study provides new insights into why sea turtles have thrived over time. Their shells are adapted to their aquatic lifestyle, and stiff enough to defend against predators while being tough enough to absorb shock," said Dr. Porter.



"This remarkable balance of strength and flexibility has allowed them to survive in the ocean for millions of years - an example of evolution shaping species in an environment.”



From the outside, a sea turtle’s shell looks simple. But inside, it’s a smart design honed by nature - built to keep these ocean travelers safe, swift, and strong.



The full study was published in the journal <a href="https://journals.biologists.com/jeb/article-abstract/228/7/jeb249959/367637/Using-the-axial-skeleton-as-armor-mechanical?redirectedFrom=fulltext" target="_blank" rel="noreferrer noopener">Journal of Experimental Biology</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;



Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.earth.com/author/eralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.



-----

Nature's armor: The hidden strength of sea turtle shells

When we envision sea turtles cruising through the ocean, we...

On April 8, 2024, millions across North America paused to watch a rare and awe-inspiring celestial event. A group of scientists was there, prepared to track bird behavior during the total solar eclipse.



The researchers discovered that birds fell unusually quiet. This behavior, however, only occurred in areas where the sun was almost completely obscured.



The research was led by scientists from <a href="https://www.loggerhead.com/" target="_blank" rel="noreferrer noopener">Loggerhead Instruments</a> and the K. Lisa Yang Center for Conservation Bioacoustics at the <a href="https://www.birds.cornell.edu/home/" target="_blank" rel="noreferrer noopener">Cornell Lab of Ornithology</a>.



The experts analyzed data from 344 Haikubox devices (small, community-powered acoustic monitors spread across the continent). This was the first large-scale study to use the Haikubox network for scientific analysis. 



A neural network detected changes in <a href="https://www.earth.com/news/bird-songs-human-speech-common-vocal-genetic-origin-syrinx/" target="_blank" rel="noreferrer noopener">bird vocalizations</a> while controlling for human interference.



<h2 class="wp-block-heading" id="h-did-birds-go-silent">Did birds go silent?</h2>



“Anecdotal evidence has long suggested that birds fall silent or exhibit nighttime <a href="https://www.earth.com/news/bird-behavior-productivity-being-directly-impacted-by-climate-change/" target="_blank" rel="noreferrer noopener">behaviors</a> during a total solar eclipse,” said Dr. David Mann, lead author of the study and researcher at Loggerhead Instruments.



“Our study shows that, on average, birds do get quiet during and just after totality, but we also learned that this behavior is strongly linked to the degree of darkness experienced."



The findings confirmed that birds generally reduced their vocal activity during totality - but only in areas where the eclipse brought more than 99% obscuration. This threshold made all the difference.



<h2 class="wp-block-heading" id="h-bird-reactions-to-the-eclipse-varied">Bird reactions to the eclipse varied </h2>



Interestingly, not all birds responded the same way. Even birds of the same species behaved differently at different locations. 



For example, black-capped <a href="https://www.earth.com/news/chickadees-are-genetically-inclined-to-have-a-remarkable-memory/">chickadees</a> in New York remained silent well after totality. The same birds in Vermont became more vocal during and just after the darkest moment.



Other examples were just as varied. Some American robins in Kentucky continued singing through the eclipse.



In contrast, pine siskins in Maine fell completely silent. These site-to-site variations left researchers with more questions than answers.



“The variability in bird responses and site differences was fascinating,” said Dr. Mann. "We really don’t know why birds had such different responses to the total darkness during the eclipse." 



"Despite examining factors like temperature, cloud cover, and wind speed, we found no significant relationship with changes in vocalization rates." 



"This strongly suggests that the sudden total darkness and associated changes in wind and temperature were the primary drivers of the observed behavioral shifts.”



<h2 class="wp-block-heading" id="h-keeping-human-noise-out-of-the-data">Keeping human noise out of the data</h2>



One key feature of the study was its effort to isolate the human factor. Haikubox data that may have been influenced by people nearby was adjusted accordingly.



This helped ensure the birds’ behavior was truly in response to the eclipse and not to excited human activity.



“Our first, quick look at Haikubox data just a few hours after the eclipse showed a large dip in bird vocalizations around the time of peak totality,” said Dr. Mann.



“When we dove deeper into the data and removed any sites where humans may have influenced the birds’ behaviors, we found a much more complicated story. People were pretty excited about the <a href="https://www.earth.com/image/total-solar-eclipse-captured-from-one-million-miles-away/" target="_blank" rel="noreferrer noopener">total solar eclipse</a>, and their celebrations likely affected the birds’ reactions.”



<h2 class="wp-block-heading" id="h-monitoring-nature-using-sound">Monitoring nature using sound</h2>



The Haikubox platform is built on the idea that everyday people can help monitor the natural world using sound. 



Each device records local bird vocalizations and uploads them to a central database. It’s a non-intrusive way to gather wildlife behavior data at scale, and it doesn't require a team of observers in the field.



“In a time when technology often pulls us away from the natural world, Haikubox does the opposite - it fosters a deeper connection to it. By combining AI technology with a love for the environment, Haikubox helps people engage with nature in a modern and educational way,” noted Dr. Mann.



This passive acoustic monitoring allows scientists to study how animals respond to natural events across large areas - without disrupting them.



<h2 class="wp-block-heading" id="h-learning-from-bird-behavior">Learning from bird behavior</h2>



Beyond eclipses, the study may have broader implications for understanding how <a href="https://www.earth.com/news/habitat-and-evolution-shape-the-unique-sounds-of-birds/" target="_blank" rel="noreferrer noopener">birds</a> react to sudden changes in light.



“Our findings can inform future research on the impacts of light pollution and sudden changes in light levels on bird behavior," noted Dr. Mann.



“Furthermore, it proves that when we combine the power of community science with clever technology, we can learn amazing things about wildlife without disturbing them, which may inform future continental-scale studies."



The researchers hope this will inspire more people to get involved in community science. More participants also means expanding the listening network.



“Passive acoustic monitoring is a terrific tool for gathering data about animal behavior, and regular folks play an important role in widening our listening network,” said Dr. Mann.



“Putting a Haikubox in your yard helps us add to the already 1 billion acoustic recordings we’ve gathered. Our community is enabling tomorrow’s scientific discoveries.”



The full study was published in the journal <a href="https://www.nature.com/articles/s41598-025-94901-6" target="_blank" rel="noreferrer noopener">Scientific Reports</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;



Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.earth.com/author/eralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.



-----

Darkness at noon: What the 2024 eclipse revealed about bird behavior

On April 8, 2024, millions across North America paused to...

Casual observers often overlook sea slugs, yet some species hide astonishing traits that challenge our expectations. One remarkable example is Elysia chlorotica, a small sea slug that produces energy from sunlight.



“It’s unique; it’s controversial; it’s elusive; it never eats,” said Dr. Patrick Krug of California State University in Los Angeles (<a href="https://www.calstate.edu/attend/campuses/los-angeles" target="_blank" rel="noreferrer noopener">CSU</a>). This slinky slug steals tiny green structures from inside algal cells and uses them to produce energy from <a href="https://www.earth.com/news/clouds-have-become-less-reflective-making-global-warming-worse/" target="_blank" rel="noreferrer noopener">sunlight</a>.&nbsp;



<h2 class="wp-block-heading" id="h-sea-slugs-living-on-sunlight">Sea slugs living on sunlight</h2>



All plants contain chloroplasts that convert sunlight into energy. Most animals depend on regular meals to survive. However, by retaining <a href="https://www.britannica.com/science/chloroplast" target="_blank" rel="noreferrer noopener">chloroplasts</a> from algal cells, Elysia chlorotica can <a href="https://www.earth.com/news/animal-cells-capable-of-photosynthesis-created-for-the-first-time/">photosynthesize</a> for months without typical feeding.



“We demonstrated that a nuclear gene of <a href="https://www.nature.com/articles/nrm1525" target="_blank" rel="noreferrer noopener">oxygenic photosynthesis</a>, psbO, is expressed in the sea slug,” wrote Mary E. Rumpho, a biochemist involved in a 2008 <a href="https://www.pnas.org/doi/10.1073/pnas.0804968105" target="_blank" rel="noreferrer noopener">study</a>. 



Researchers have shown that these stolen chloroplasts keep running inside the slug, even though vital genes usually reside in the original algal cells.&nbsp;



Probing deeper into this bizarre fusion of plant-like capabilities and animal physiology may help experts see how genes could move between species. That possibility intrigues many in the scientific community because it suggests a hidden path for <a href="https://www.earth.com/news/ocean-warming-broke-records-for-450-straight-days/" target="_blank" rel="noreferrer noopener">adaptation</a>.



<h2 class="wp-block-heading" id="h-shrinking-sea-slug-habitats">Shrinking sea slug habitats</h2>



Although these slugs captivate researchers, actually finding them is tricky. Shifting coastlines, development, and habitat changes might be shrinking their marshy homes.



Some specialists note that high tide fluctuations and coastal erosion can wipe out the algae on which these creatures depend. Others point out that a combination of <a href="https://www.earth.com/news/record-ocean-warming-in-2024-is-a-warning-for-our-planet/">warming waters</a> and pollution could intensify threats to their survival.



Only a handful of scientists have tried to unravel these secrets, and many have since retired or pivoted to other projects. As the number of experts declines, so does the knowledge pipeline for these unusual mollusks.



<h2 class="wp-block-heading" id="h-mysteries-of-photosynthesis-in-sea-slugs">Mysteries of photosynthesis in sea slugs </h2>



The biggest mystery is how the sea slug’s own cells refrain from attacking foreign chloroplasts. Animals typically react to invaders, yet this species tolerates them in ways not fully understood.



Another question concerns the slug’s ability to deal with the <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC1808645/" target="_blank" rel="noreferrer noopener">free oxygen radicals</a> generated through photosynthesis. Normally, this process is toxic to animal tissue, but these leaf-like wanderers seem to sidestep the damage.



Experiments have hinted that certain <a href="https://www.immunology.org/public-information/what-immunology" target="_blank" rel="noreferrer noopener">immunological</a> tweaks may help the slugs coexist with these solar components. Some researchers suspect molecular signals borrowed from algae might give the slug an edge.



<h2 class="wp-block-heading" id="h-dwindling-population-makes-research-difficult">Dwindling population makes research difficult</h2>



Some who once pursued this slug have turned their attention to more readily available species. Collecting enough specimens for robust studies has become increasingly difficult, which limits progress.



The researchers note that raising these sea slugs in the lab is challenging. The adults, which usually live less than a year, require attentive care to reproduce. Their eggs hatch into free-swimming larvae that feed on various types of algae. 



As they mature, however, the young slugs switch to eating Vaucheria litorea - a slow-growing and difficult-to-culture alga.



“They’ll eat it literally faster than we could ever grow it,” said researcher Sidney Pierce, who has studied these animals for decades.



As younger generations of scientists seek <a href="https://www.earth.com/news/licking-rocks-and-zombie-spiders-the-wacky-world-of-ig-nobel-prizes/">research topics</a>, many avoid elusive organisms. Without fresh talent, answers to fundamental questions may never materialize.



<h2 class="wp-block-heading" id="h-dna-reveals-genetic-surprises">DNA reveals genetic surprises</h2>



Genomic research is uncovering interesting details about the slug’s DNA. One draft genome assembly found over 24,000 protein-coding genes, suggesting that the genome is larger than expected.



Scientists are investigating whether the slug has captured additional algal genes that help maintain stolen chloroplasts. If confirmed, these conclusions would offer a template for understanding genetic transfers across species.



Such discoveries might even point to new approaches in biotechnology, where harnessing photosynthesis in novel settings could be a game-changer. But these sampling efforts hinge on keeping the slug’s population stable.



<h2 class="wp-block-heading" id="h-viable-solutions-going-forward">Viable solutions going forward</h2>



In addition to yielding biological insights, the slug’s weird synergy with algae may inform <a href="https://www.earth.com/news/young-mussels-are-ideal-for-ecosystem-restoration/">ecological restoration</a>. If we comprehend how this animal adapts to shifting coastal conditions, we might refine habitat protection strategies.



Some suggest that mapping the slug’s distribution and monitoring water quality could reveal its true population status. Others envision <a href="https://education.nationalgeographic.org/resource/citizen-science-projects/" target="_blank" rel="noreferrer noopener">citizen science programs</a> that inspire local communities to document sightings.



<h2 class="wp-block-heading" id="h-secrets-of-sun-loving-sea-slugs">Secrets of sun-loving sea slugs </h2>



Many experts see the value in this sea slug’s rare talent to convert sunlight into energy. They believe that more comprehensive studies could spark exciting breakthroughs. 



If scientists persevere, the synergy between animals and plants might reveal more about life’s creative potential.



Even though the path ahead looks challenging, there is hope that future teams will unlock more secrets about this sun-loving creature. Each fresh observation could demonstrate how life can seemingly bend the rules.



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



Environmental groups may collaborate with academic institutions to fund targeted surveys. This would ensure that these elusive sea slugs are not overlooked in shifting habitats.



Support from diverse disciplines, including molecular biology, marine ecology, and <a href="https://www.earth.com/news/biodiversity-leaks-conservation-efforts-may-shift-harm-elsewhere/">conservation policy</a>, might unite to keep Elysia chlorotica alive for generations.



Scientists remain optimistic about new fieldwork opportunities. Additional synergy and collaboration across scientific networks could generate crucial momentum.



The study was published in the journal <a href="https://www.pnas.org/doi/10.1073/pnas.0804968105" target="_blank" rel="noreferrer noopener">Proceedings of the National Academy of Sciences</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by <a href="https://www.earth.com/author/eralls/">Eric Ralls</a> and Earth.com.



-----

Some sea slugs use sunlight for energy, just like plants

Casual observers often overlook sea slugs, yet some species hide...

Climate change is pushing pest insects and mites into new territories.&nbsp;Many pests are migrating from the equator to cooler regions that used to keep them at bay.



Global trade networks are also playing a big part in this shuffle. Ports and shipping channels create pathways for invasive <a href="https://www.earth.com/news/insect-populations-dramatically-declining-around-the-world-rising-temperatures/" target="_blank" rel="noreferrer noopener">species</a> to arrive in places that once seemed too distant to worry about.



Professor Dan Bebber from the <a href="https://www.exeter.ac.uk" target="_blank" rel="noreferrer noopener">University of Exeter</a> is part of a research team that includes experts from the University of Hebei and the Chinese Academy of Sciences. 



The researchers are calling for swift action to protect key staple crops, including wheat and maize.



<h2 class="wp-block-heading" id="h-warmer-climates-help-pests-multiply">Warmer climates help pests multiply</h2>



Temperatures are going up in regions that had cooler climates. This creates conditions where more <a href="https://www.earth.com/news/very-little-is-known-about-99-of-all-insects-on-earth/" target="_blank" rel="noreferrer noopener">insects</a> and mites can survive winters and breed more often.



More generations in a year mean bigger populations. More bugs mean higher odds that pests will find, eat, and damage vital food sources.



<h2 class="wp-block-heading" id="h-farming-practices-weaken-pest-control">Farming practices weaken pest control</h2>



Intensive agricultural <a href="https://www.fao.org/publications/sofi/2021/en" target="_blank" rel="noreferrer noopener">practices</a> can decrease biodiversity. When you have fewer predators around, pests multiply freely.



<a href="https://geopard.tech/blog/disadvantages-and-benefits-of-monocropping-in-the-context-of-the-environment/#:~:text=Monocrop%20agriculture%20is%20about%20sowing,field%2C%20commonly%20known%20as%20polyculture." target="_blank" rel="noreferrer noopener">Monocrops</a>, irrigation, and fertilizers support bigger yields, but these methods also give pests reliable food and shelter. This shift weakens the natural checks and balances once provided by a richer variety of species.



<h2 class="wp-block-heading" id="h-tropical-pests-invade-cooler-regions">Tropical pests invade cooler regions</h2>



Tropical <a href="https://www.earth.com/news/flies-are-more-vulnerable-to-climate-change-than-bees/" target="_blank" rel="noreferrer noopener">species</a> are advancing into temperate zones. Cold air once put a stop to major swarms, but warm spells that last longer allow insects to stay active.



High latitudes are especially vulnerable. Wheat, rice, and soybean fields in these areas can become prime feeding grounds for new and old invaders.



<h2 class="wp-block-heading" id="h-trade-accelerates-invasion">Trade accelerates invasion</h2>



Globalization of trade networks is fueling pest invasions worldwide, with damage surpassing $423 billion in <a href="https://www.wto.org/english/res_e/booksp_e/wtr24_e/wtr24_e.pdf" target="_blank" rel="noreferrer noopener">2019</a>.



Goods move around in a matter of days. That opens doors for species to hitch rides in shipping containers, seed batches, and any organic packaging not strictly monitored.



<h2 class="wp-block-heading" id="h-pests-and-climate-risks-threaten-food">Pests and climate risks threaten food </h2>



“About 40% of global crop production is currently lost to <a href="https://www.earth.com/news/butterfly-effect-in-reverse-climate-change-turns-havens-into-traps/" target="_blank" rel="noreferrer noopener">pests</a> and diseases, creating a major challenge for global food security,” said co-author Professor Dan Bebber. Farmers already struggling with unpredictable weather are on edge with each new pest report.



Beyond economic impacts, these losses can aggravate hunger in vulnerable regions. Reduced output raises prices, and entire communities face shortages of staple crops like rice or maize.



<h2 class="wp-block-heading" id="h-climate-extremes-trigger-pest-outbreaks">Climate extremes trigger pest outbreaks</h2>



Periods of drought or heatwaves can set off surprising outbreaks. Plants under stress become easy targets, since <a href="https://www.sciencedirect.com/topics/medicine-and-dentistry/neurotoxin" target="_blank" rel="noreferrer noopener">neurotoxins</a> that some pests produce can flourish in warm, dry conditions.



In certain cases, intense rainfall might wash smaller pests away. Still, overall shifts in humidity and temperature can boost pest populations that prefer wet fields over parched ground.



<h2 class="wp-block-heading" id="h-scientists-push-for-better-pest-tracking">Scientists push for better pest tracking</h2>



Researchers see promise in pest <a href="https://www.earth.com/news/grasshopper-size-changes-in-response-to-shifting-climate/" target="_blank" rel="noreferrer noopener">monitoring</a>. Early-warning systems can track insects as they migrate north and uphill. Predictive models can also factor in shifting climates to pinpoint future hot zones. 



“We need better pest monitoring, predictive models, and climate-smart management strategies to safeguard staple crops such as wheat, rice, maize and soybean from increasing pest risks,” said Bebber.



<h2 class="wp-block-heading" id="h-farmland-changes-can-reduce-infestations">Farmland changes can reduce infestations</h2>



Many experts suggest landscape diversity and planting non-crop species near fields. These habitats can support natural enemies of pests, like ladybugs for aphids.



Strategies that add conservation biocontrol might help growers reduce pesticides. This lowers the risk of insects developing resistance and cuts down on harmful chemicals reaching waterways.



<h2 class="wp-block-heading" id="h-action-needed-for-climate-driven-pests">Action needed for climate-driven pests</h2>



Cooperative efforts across borders could limit the entry of new pests. Tighter inspection of exports and imports can help identify and quarantine risky arrivals.



Teams focused on integrated pest management can set protocols in regions at highest risk. That plan might combine crop rotation, beneficial insects, and more resilient plant varieties.



The agricultural world is shifting. As pest insects spread to cooler regions, farmland faces challenges nobody expected even a few decades ago.



Innovation in planting decisions, pest prediction, and trade rules can bring hope. Action now can keep dinner tables stocked and protect farmers from devastating infestations.



The study is published in the journal <a href="https://www.nature.com/articles/s43017-025-00652-3" target="_blank" rel="noreferrer noopener">Nature Reviews Earth &amp; Environment</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.



Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.



-----

Pests are moving to cooler regions due to climate change

Climate change is pushing pest insects and mites into new...

In the final era of the Cretaceous, giant reptiles were not the only ones navigating a changing planet. Tiny fossils suggest that many small mammals embraced ground-based living long before the arrival of the asteroid that ended the dinosaur age.



Researchers say these creatures were already exploring terrestrial spaces several million years ahead of that cosmic event. 



This challenges the idea that <a href="https://www.earth.com/news/saving-the-cultural-legacy-of-wild-animals/" target="_blank" rel="noreferrer noopener">mammals</a> only moved down from the trees to the ground after dinosaurs were out of the picture.



<a href="https://www.bristol.ac.uk/people/person/Christine-Janis-450fb945-9d7d-4004-a540-2524be359b3e/" target="_blank" rel="noreferrer noopener">Professor Christine Janis</a> from the University of Bristol’s <a href="https://www.bristol.ac.uk/earthsciences/" target="_blank" rel="noreferrer noopener">School of Earth Sciences</a> has contributed to this idea. She and her team analyzed the ends of small mammal limbs and found structures suited to movement on solid ground.



<h2 class="wp-block-heading" id="h-before-the-dinosaurs-died">Before the dinosaurs died</h2>



The Maastrichtian Age was the last chapter of the Late Cretaceous, running from about 72 to 66 million years ago. 



During this time, Earth looked very different from today - sea levels were high, and warm shallow seas covered large parts of the continents. 



Dinosaurs still ruled the land, with massive herbivores like Triceratops and duck-billed hadrosaurs grazing in herds, while predators like Tyrannosaurus rex stalked them. 



<a href="https://www.earth.com/news/how-dinosaur-extinction-influenced-fruit-evolution/" target="_blank" rel="noreferrer noopener">Flowering plants</a> had spread widely by this point, shaping new ecosystems, and early birds and mammals were quietly evolving in the background.



But beneath the surface, change was brewing. Volcanic activity in what's now India was ramping up, pumping gases into the atmosphere. The climate started to shift, and ecosystems became more fragile.



Then came the asteroid. It triggered wildfires, <a href="https://www.earth.com/news/the-extinction-of-dinosaurs-was-not-caused-by-volcanic-eruptions/" target="_blank" rel="noreferrer noopener">climate chaos</a>, and the Cretaceous–Paleogene (K–Pg) extinction event that wiped out around 75% of all species, including the non-avian dinosaurs. 



Thankfully, mammals were part of this <a href="https://www.earth.com/news/dinosaur-extinction-led-to-the-emergence-of-ant-agriculture/" target="_blank" rel="noreferrer noopener">surviving group</a>, which is the reason that we're all here today and able to read this article.



<h2 class="wp-block-heading" id="h-flowers-helped-mammals-move-to-ground">Flowers helped mammals move to ground</h2>



Mammals were not just contending with large reptiles. They also inhabited landscapes that were rapidly filling with <a href="https://www.britannica.com/plant/angiosperm" target="_blank" rel="noreferrer noopener">angiosperms</a>, or flowering plants, that provided rich understory habitats in which to live.



“The vegetational habitat was more important for the course of <a href="https://www.sciencedirect.com/science/article/pii/S0960982206002454">Cretaceous mammalian evolution</a> than any influence from dinosaurs,” said Professor Janis. 



This idea emphasizes how expanded ground-level plant cover created new opportunities for smaller <a href="https://www.earth.com/news/worlds-oldest-fish-coelacanth-presumed-extinct-for-60-million-years-before-rediscovery/" target="_blank" rel="noreferrer noopener">animals</a>.



<h2 class="wp-block-heading" id="h-how-new-plants-reshaped-habitats">How new plants reshaped habitats</h2>



Beneath prehistoric canopies, modestly sized creatures needed spaces to hide, and diverse food sources to keep them going. 



Old forests dominated by <a href="https://www.britannica.com/plant/gymnosperm" target="_blank" rel="noreferrer noopener">gymnosperms</a> had provided fewer ground-based feeding options, but flowering plants added more <a href="https://www.earth.com/news/meet-mixodectes-pungens-prehistoric-mammal-and-relative-of-primates/" target="_blank" rel="noreferrer noopener">variety</a>.



Experts link the diversification of flowering plants to changes in habitat structure. The vegetation supported denser undergrowth at lower levels, which let many small mammals roam freely without competing for the treetops.



<h2 class="wp-block-heading" id="h-why-fossil-fragments-matter">Why fossil fragments matter</h2>



Most early studies of mammal locomotion relied on full or partial skeletons. Scientists had a hard time finding enough complete specimens to reconstruct how prehistoric <a href="https://www.earth.com/news/ancient-molecule-tells-starfish-and-humans-when-to-stop-eating/" target="_blank" rel="noreferrer noopener">creatures</a> moved around.



By examining partial bones, known as <a href="https://www.sciencedirect.com/topics/medicine-and-dentistry/epiphysis" target="_blank" rel="noreferrer noopener">epiphyses</a>, researchers overcame that hurdle. Subtle features on these limb ends can hint at whether an animal spent more time on the ground or clinging to branches.



Some epiphyses revealed that <a href="https://www.earth.com/news/early-humans-had-surprising-diets-3-5-million-years-ago/" target="_blank" rel="noreferrer noopener">mammal</a> limbs were built for sturdy footing rather than gripping bark.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/04/mammals_first-ground-dwellers_Dryolestes_Credit-James-Brown_1big.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/04/mammals_first-ground-dwellers_Dryolestes_Credit-James-Brown_1s.webp" alt="Dryolestes, a Late Jurassic relative of the Cretaceous therians. Credit: Artist James Brown. Pamela Gill" class="wp-image-1964794"/></a><figcaption class="wp-element-caption">Dryolestes, a Late Jurassic relative of the Cretaceous therians. Click imaeg to enlarge. Credit: Artist James Brown. Pamela Gill</figcaption></figure>



Prior thinking painted a picture of mostly arboreal lifestyles, but these fossils suggest that a gradual transition to the ground began sooner than once believed.



This method let scientists track a broader range of species. They no longer had to rely on the rare jackpot of finding an intact skeleton.



<h2 class="wp-block-heading" id="h-ground-living-mammals-fared-better">Ground-living mammals fared better</h2>



Experts have suggested that non-arboreal species were more likely to endure the impact that devastated life at the <a href="https://royalsocietypublishing.org/doi/abs/10.1098/rsbl.2018.0458" target="_blank" rel="noreferrer noopener">K-Pg boundary</a>. 



This event may have dealt a harsher blow to treetop animals, as forests took a serious hit.



Many <a href="https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/therian" target="_blank" rel="noreferrer noopener">therian groups</a>, which include marsupials and placentals, showed signs of a terrestrial lifestyle long before disaster struck. 



Researchers propose that ground-based behaviors opened new diets and protective nooks.



<h2 class="wp-block-heading" id="h-mammals-evolved-features-suited-for-ground">Mammals evolved features suited for ground</h2>



In Western North America, there is a rich record of small fossils that span the late Cretaceous and earliest Paleogene periods. 



By comparing these remains with modern-day mammals of similar size, scientists noticed a slow but steady upswing in the presence of terrestrial forms.



Bone shapes from different intervals, such as the <a href="https://www.biodiversitylibrary.org/bibliography/89230" target="_blank" rel="noreferrer noopener">Judithian</a> and <a href="https://geoinfo.nmt.edu/publications/periodicals/nmg/6/n4/nmg_v6_n4_p72.pdf" target="_blank" rel="noreferrer noopener">Lancian</a>, reflect shifts in locomotion strategies. By the dawn of the Paleogene, ground-adapted features appeared more commonly than once imagined.



Observations of these ancient bone fragments suggest that mammals responded to plant-driven changes by easing out of the treetops and onto solid ground. 



Ecology and environment often act in tandem, and this scenario might be a prime example.



Before the asteroid struck, these animals had been fine-tuning a flexible approach to living. That choice may have helped them weather the harsh aftermath of an altered planet.



<h2 class="wp-block-heading" id="h-what-happens-next">What happens next?</h2>



Some scientists plan to explore whether similar patterns can be found in other regions. 



There is also an interest in refining techniques that deduce locomotion strategies from small bones, so that scientists can determine whether these terrestrial traits show up worldwide.



Future work may confirm whether this early move to the ground played a big role in mammal survival. For now, these small fossils highlight how living things can shift gears in response to changes in habitat availability. 



The study is published in <a href="https://onlinelibrary.wiley.com/doi/10.1111/pala.70004" target="_blank" rel="noreferrer noopener">Palaeontology</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by <a href="https://www.earth.com/author/eralls/">Eric Ralls</a> and Earth.com.



-----

How mammals survived the asteroid impact that killed the dinosaurs

In the final era of the Cretaceous, giant reptiles were...

Romulus and Remus are the names on everyone’s lips right now. These large, pale-furred canines, described by some as dire wolf lookalikes, have been heralded as living pieces of prehistory. 



But some scientists say the hype is running far ahead of the facts.



<a href="https://tamu.academia.edu/AngelaPerri" target="_blank" rel="noreferrer noopener">Angela Perri</a> from the Department of Archaeology at <a href="https://www.durham.ac.uk" target="_blank" rel="noreferrer noopener">Durham University</a> is urging caution about what these animals truly represent. 



The pups in question may carry a handful of edits derived from ancient dire wolf DNA, but some researchers argue that’s not enough to call them real dire wolves.



<h2 class="wp-block-heading" id="h-dire-wolves-were-not-true-wolves">Dire wolves were not true wolves</h2>



The dire <a href="https://www.nature.com/articles/d41586-021-00072-5" target="_blank" rel="noreferrer noopener">wolf</a> was a formidable carnivore that roamed parts of North and South America, eventually vanishing more than 10,000 years ago. 



A 2021 <a href="https://www.nature.com/articles/s41586-020-03082-x" target="_blank" rel="noreferrer noopener">study</a> suggested it shared a common ancestor with wolves nearly 5.7 million years ago, which means <a href="https://www.nature.com/articles/s41586-022-04824-9" target="_blank" rel="noreferrer noopener">modern gray wolves</a> and dire wolves might be far less related than many believed.



Questions swirl around the label “wolf” itself. That older research hints that dire wolves were possibly closer to a giant form of coyote than to present-day gray wolves; challenging the idea that a few visual <a href="https://www.earth.com/news/birds-inspire-a-safer-method-of-editing-human-genes/" target="_blank" rel="noreferrer noopener">traits</a> can define an animal’s species or evolutionary place.



<h2 class="wp-block-heading" id="h-gene-edited-pups-resemble-legends">Gene-edited pups resemble legends</h2>



Scientists at <a href="https://colossal.com/" target="_blank" rel="noreferrer noopener">Colossal Biosciences</a> used genetic editing to produce large canines resembling the old legends. 



They extracted cells from gray wolves, modified certain <a href="https://www.earth.com/news/gene-modification-can-create-better-tomatoes-eggplants-but-should-we-do-it/" target="_blank" rel="noreferrer noopener">genes</a>, then implanted the resulting embryos into dog surrogates.



Romulus and Remus are big, display lighter fur, and exhibit some behaviors many associate with wild wolves. 



Yet a growing chorus of experts wonders if these animals can truly fit the category of a species that split from living canids so long ago.



<h2 class="wp-block-heading" id="h-scientists-question-dire-wolf-claims">Scientists question dire wolf claims</h2>



Some observers claim the entire project creates a spectacle rather than a legitimate conservation tool. They see the repeated references to popular culture as a clever publicity move more than a scientific milestone.



Others question whether the presence of just 20 <a href="https://www.earth.com/news/crispr-gene-editing-gets-a-revolutionary-upgrade-with-new-tool/" target="_blank" rel="noreferrer noopener">modified genes</a> is enough to replicate all the key traits that made dire wolves unique. 



One scientist famously asked if tinkering with a few genetic differences in a chimpanzee could ever make it human.



<h2 class="wp-block-heading" id="h-edited-pups-aren-t-dire-wolves">Edited pups aren’t dire wolves</h2>



Colossal’s announcement triggered debate over what it means to bring back a species. The company's pups may look the part, but leading experts argue they fall short of true <a href="https://colossal.com/de-extinction/" target="_blank" rel="noreferrer noopener">de-extinction</a>. 



According to <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC7484015/" target="_blank" rel="noreferrer noopener">paleogenomic</a> data, the real dire wolf was so genetically distinct it may not have been a wolf at all - belonging instead to a now-extinct American lineage far removed from modern canids.



This raises serious doubts about whether editing a few dozen <a href="https://www.earth.com/news/boosting-crop-colors-with-gene-editing-can-improve-weed-control/" target="_blank" rel="noreferrer noopener">genes</a> can recreate an organism with such a unique evolutionary history. 



The physical similarities between gray wolves and dire wolves may come down to <a href="https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/convergent-evolution" target="_blank" rel="noreferrer noopener">convergent evolution</a>, not close ancestry.



Without addressing the deeper <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC3233720/" target="_blank" rel="noreferrer noopener">genomic divergence</a>, the result may be more of a hybrid impersonation than a faithful revival.



<h2 class="wp-block-heading" id="h-making-new-animals-raises-concerns">Making new animals raises concerns</h2>



Beyond taxonomy, the <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC3078015/" target="_blank" rel="noreferrer noopener">ethics</a> of creating new animals in the lab weigh heavily on critics. Cloning and genetic editing can lead to unpredictable results, including suffering for both offspring and surrogates. 



Even with no miscarriages reported in this case, concerns remain about scaling the process, especially if it’s applied to more complex or sensitive species like elephants.



There’s also the matter of consent and quality of life. Romulus, Remus, and Khaleesi may be healthy now, but their entire lives will be monitored, confined, and shaped by humans. 



As more animals are created using similar methods, society will need to grapple with what responsibilities come with reviving dire wolf-like creatures that never asked to return.



<h2 class="wp-block-heading" id="h-modern-ecosystems-may-not-cope">Modern ecosystems may not cope</h2>



Raising a handful of designer canines in an enclosure might be more of a display than an ecological intervention. 



The real dire wolf thrived in ancient environments that no longer exist. Releasing them into today’s ecosystems could cause more disruption than restoration.



Predators need large, stable territories and abundant prey. It’s unclear how modern habitats would handle a canine unlike current wolf species in size and hunting style. 



Even in controlled reserves, their natural instincts might clash with confined, human-managed spaces.



<h2 class="wp-block-heading" id="h-preserving-vs-resurrecting">Preserving vs resurrecting</h2>



Some conservationists push back on “bringing back” lost creatures like the dire wolf when existing species face urgent threats. 



Many large predators are on the brink right now, which raises priorities about saving them first.



“We are an evolutionary force at this point,” stated <a href="https://colossal.com/team/beth-shapiro-ph-d/" target="_blank" rel="noreferrer noopener">Beth Shapiro</a>, Colossal’s chief science officer, pointing to the importance of innovative <a href="https://www.earth.com/news/novel-gene-editing-tool-analyzes-sperm-health-in-animals/" target="_blank" rel="noreferrer noopener">genetics</a>. 



She sees these methods as tools for protecting endangered populations rather than only a means of revival.



<h2 class="wp-block-heading" id="h-the-commercial-angle">The commercial angle</h2>



Colossal Biosciences is valued at over ten billion dollars, and it’s branching into other genetic ventures. Observers note that money-making spinoffs could overshadow concerns about animal welfare or ecological impacts.



Related startups have tried to harness genetic advances to solve modern problems such as plastic breakdown or livestock breeding. 



Critics say that resurrecting extinct species feels like a flashy sideshow that might distract from immediate biodiversity issues.



<h2 class="wp-block-heading" id="h-science-risks-outpacing-ethics">Science risks outpacing ethics</h2>



Skeptics acknowledge that advanced cloning or gene editing methods can sometimes boost endangered species by broadening the gene pool. But they also point out that no species is restored in a vacuum.



Legal, ecological, and ethical hurdles arise if these animals ever leave controlled facilities. Modern landscapes differ dramatically from ancient times, and artificially created predators might not fit comfortably into today’s ecosystems.



<h2 class="wp-block-heading" id="h-future-of-gene-edited-species-unclear">Future of gene-edited species unclear</h2>



The question of how to manage animals engineered from partial ancient genes remains a knotty one. 



Colossal’s approach might evolve as more data emerges and more voices join the conversation. But for now, the line between innovation and overreach remains blurry.



Scientists like Angela Perri emphasize the need for deeper DNA analysis, more rigorous peer review, and a realistic look at ecological dynamics. 



Only then can we decide if a newly minted wolf-like pup is truly close to the original dire wolf that once reigned.



Until then, calling it a resurrection might be more fiction than fact.



The study is published in <a href="https://www.nature.com/articles/s41586-020-03082-x" target="_blank" rel="noreferrer noopener">Nature</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.



Check us out on <a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by <a href="https://www.linkedin.com/in/eric-ralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a> and Earth.com.



-----

Scientists: No, those are definitely not 'resurrected' dire wolves

Romulus and Remus are the names on everyone’s lips right...

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



<figure class="wp-block-embed aligncenter is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio"><div class="wp-block-embed__wrapper">
https://youtu.be/Ug657J67iEo?si=w96YjGMsg939LD_3
</div></figure>



Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.



"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.



"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."



Video/ Image Credit: ESA



---



By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Nushagak Bay in southwest Alaska

[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.



"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.



To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.



Video/ Image Credit: American Chemical Society&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="3upvlAaHgO-2256633-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;



"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.



"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."



"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."



Video/Image Credit: ESA&nbsp;



---



By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Lake Trasimeno in Central Italy

[sendtonews key="3upvlAaHgO-2256633-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;



The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;



Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.



Video Credit: American Chemical Society&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Detecting mercury contamination with the tap of a finger

[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> explores the ability of salt to transform the way that foods and beverages taste. Salt is known to cover up undesirable flavors, such as bitterness in coffee or beer, but how exactly does sodium chloride change the taste of other compounds?



One previous study showed that, not only does salt suppress bitterness, but also enhances sweetness and sourness. Another study revealed that bitterness reduction by salt seems to be happening at the tongue receptor level as well as in the brain.&nbsp;



While it is known that salt taste is mediated by the presence of sodium channels in the form of taste buds, experts believe that there is also an unknown receptor responsible for how we taste salt that has not yet been identified.&nbsp;



Video Credit: ACS Reactions



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

How does salt makes things taste better?

[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JRaP49ISmm-2357509-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Santiago, the capital city of Chile. The city is located in the center of the Santiago Metropolitan Region, which has a population of about eight million people.&nbsp;



'The weather of Santiago resembles the Mediterranean climate with dry and warm summers with temperatures reaching up to 35°C (from October to March) and cool and humid winters that can drop to 0°C (from April to September)."



"The city lies in the centre of the country’s central valley around 80 km from the Pacific Ocean to the west and borders Argentina to the east. A tiny part of Argentina is visible in the top-right corner of the image where the mountain crest of the Andes Mountains acts as a divider between the two countries," says ESA.



Video/ Image Credit: ESA



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Santiago, Chile in South America

[sendtonews key="JRaP49ISmm-2357509-12187" type="single"] Today’s Video of the Day from the...

Spiral,Galaxy,,Illustration,Of,Milky,Way

<div class="wp-block-sendtonews-playerselector">[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"]</div>



Astronomers at <a href="https://www.jhu.edu/">Johns Hopkins University</a> have created an interactive map of the universe, including the actual position and real colors of 200,000 galaxies. The map allows the public to access data that was previously only available to scientists.



The map was developed using data collected by the Sloan Digital Sky Survey. For over two decades, a telescope in New Mexico was aimed at slightly different locations to capture the night sky.&nbsp;



"Growing up I was very inspired by astronomy pictures, stars, nebulae and galaxies, and now it's our time to create a new type of picture to inspire people," said map creator Brice Ménard, a professor at Johns Hopkins. "Astrophysicists around the world have been analyzing this data for years, leading to thousands of scientific papers and discoveries. But nobody took the time to create a map that is beautiful, scientifically accurate, and accessible to people who are not scientists. Our goal here is to show everybody what the universe really looks like."



"In this map, we are just a speck at the very bottom, just one pixel. And when I say we, I mean our galaxy, the Milky Way which has billions of stars and planets. We are used to seeing astronomical pictures showing one galaxy here, one galaxy there or perhaps a group of galaxies. But what this map shows is a very, very different scale."



"From this speck at the bottom, we are able to map out galaxies across the entire universe, and that says something about the power of science."



The <a href="https://mapoftheuniverse.net/">interactive map</a> is available online, where it can be downloaded for free.



Video Credit: Johns Hopkins&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Interactive map of the universe includes 200,000 galaxies

[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"] Astronomers at Johns Hopkins University have created...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"]</div>



Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Lesotho: Africa's "Kingdom in the Sky"

[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"] Lesotho: Africa's "Kingdom in the Sky" Today’s...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qjvhBOBnY8-2426650-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Dublin, the capital and largest city of Ireland. Beyond its pub culture, Dublin is known as a modern culinary destination and a UNESCO City of Literature.



"Dublin is located near the midpoint of Ireland’s east coast in the province of Leinster. The city, which covers an area of around 115 square kilometers, is bordered by the Dublin Mountains, a low mountain range to the south, and is surrounded by flat farmland to the north and west," says ESA.



"The city straddles the River Liffey, which rises in the Wicklow Mountains and flows around 80 kilometers eastwards through the city of Dublin, in which it is canalised and bordered with quays. It then empties into Dublin Bay, an arm of the Irish Sea."



Dublin has an abundance of green spaces, including one of the largest enclosed public parks in any European capital city. Phoenix Park, which was originally formed as a royal hunting park in the 1660s, includes 707 hectares of green space.



Video Credit: ESA&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The city of Dublin on Ireland's east coast

[sendtonews key="qjvhBOBnY8-2426650-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the province of Zaragoza in northeast Spain. The image was captured by the Copernicus Sentinel-2 mission.



"Together with the provinces of Huesca and Teruel, Zaragoza formed the old kingdom of Aragon. Its capital, also called Zaragoza (not visible in this image) is home to around half of Aragon’s population," says ESA.



"The Ebro River can be seen winding its way through the province from west to east in this image. Between its source in the Cantabrian Mountains in the northwest and its delta on the Mediterranean coast, the Ebro River is fed by more than 200 tributaries as it flows 910 km across much of northern Spain."



Since rainfall is very scarce in this region, irrigation in the Ebro basin is critically important. In the valleys surrounding the Ebro River, many fields are used for growing crops such as corn, wheat, and barley.



Video/ Image Credit: ESA



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The province of Zaragoza in northeast Spain

[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0879czfG3k-1785905-12187" type="single"]</div>



Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The rapid retreat of the Columbia Glacier

[sendtonews key="0879czfG3k-1785905-12187" type="single"] Today’s Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the Pyrenees Mountains, which form a natural boundary between France and Spain in southwest Europe.



The mountain range is 430 kilometers in length. It stretches from the Mediterranean Sea on the east to the Atlantic Ocean on the west.



At an elevation of 3404 meters, Pico de Aneto is the highest mountain peak in the Pyrenees, and the third-highest peak in Spain. Pico de Aneto is located in the Posets-Maladeta Natural Park, which spans more than 82,000 acres.&nbsp;



"Geological studies have revealed that the Pyrenees Mountains have been around for longer than the Alps, with their sediments first deposited in coastal basins during the Paleozoic and Mesozoic eras," reports ESA.



"The entire mountain range formed due to the upwelling of large sedimentary rocks by the collision of the Iberian and the Eurasian plate around 100 to 150 million years ago, followed by intense erosion from ice and water."



The western Pyrenees receive more precipitation due to moisture blowing in from the Atlantic Ocean. The mountain range contains many lakes, several small glaciers, and some of the highest waterfalls in Europe.



Video &amp; Image Credit: ESA



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The Pyrenees Mountains in southwest Europe

[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"] Today’s Video of the Day from the...

Earth,Like,Exoplanet,3d,Render

<div class="wp-block-sendtonews-playerselector">[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"]</div>



Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes two exoplanets that are orbiting a star 218 light-years away. A team of researchers led by the University of Montreal has found evidence that these planets are "water worlds."



The experts used data from NASA’s Hubble and Spitzer Space Telescopes. They discovered that exoplanets Kepler-138 c and Kepler-138 could be composed largely of water.



"We previously thought that planets that were a bit larger than Earth were big balls of metal and rock, like scaled-up versions of Earth, and that's why we called them super-Earths," explained study co-author Björn Benneke.&nbsp;



"However, we have now shown that these two planets, Kepler-138 c and d, are quite different in nature and that a big fraction of their entire volume is likely composed of water. It is the best evidence yet for water worlds, a type of planet that was theorized by astronomers to exist for a long time."



Video Credit: NASA Goddard



Image Credit: NASA, ESA, and Leah Hustak (STScI)



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Two distant planets may be "water worlds"

[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"] Today's Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JbW4VsY53O-1632195-12187" type="single"]</div>



Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qARzJPSabQ-2270617-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Melt ponds on the Greenland Ice Sheet

[sendtonews key="qARzJPSabQ-2270617-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qas3EhyI0Y-2220951-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes a new map of Mars that is providing insight into the planet’s watery past. The map also reveals where future missions could safely land on Mars.&nbsp;



The map has been created over the last decade using observations of water-rich rocks and mineral deposits. The images were captured by ESA’s Mars Express and NASA’s Mars Reconnaissance Orbiter.



"A big surprise is the prevalence of these minerals, with the map revealing hundreds of thousands of water-affected locations in the oldest parts of the planet," says ESA. "The new data will help answer exciting questions about Mars’ climate history, whether water was globally persistent or confined to short, intense episodes, and whether the conditions were ever suitable for life."



"Specifically, the map shows the locations and abundances of aqueous minerals. These are from rocks that have been chemically altered by the action of water in the past, and have typically been transformed into clays and salts."



According to John Carter of the Institut d’Astrophysique Spatiale (IAS), our collective understanding of Mars has been oversimplified. He explained that planetary scientists have tended to think that only a few types of clay minerals on Mars were created during its wet period, then as the water gradually dried up, salts were produced across the planet.



The new map shows that the composition of Mars is much more complicated than what we thought. For example, while many salts formed after Martian clays, there are some salts that are presumed to be older than some of the clays.&nbsp;



“The evolution from lots of water to no water is not as clear cut as we thought, the water didn’t just stop overnight. We see a huge diversity of geological contexts, so that no one process or simple timeline can explain the evolution of the mineralogy of Mars. That’s the first result of our study. The second is that if you exclude life processes on Earth, Mars exhibits a diversity of mineralogy in geological settings just as Earth does,” said Carter.



Video Credit: ESA



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The history of Mars is much more complex than we thought

[sendtonews key="qas3EhyI0Y-2220951-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="vpljfR2VBX-2560867-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes how cavefish adapted to a sedentary lifestyle over tens of thousands of years. 



The experts found that the muscle metabolism of cavefish has been genetically reprogrammed over time. As a result, the animals have experienced major changes in their morphology and behavior. Despite these changes, however, the cavefish remain healthy and fit.



The research may provide new clues about the evolutionary consequences of prolonged physical inactivity in humans.&nbsp;



“It’s no surprise that people are moving less and less as technology has advanced,” said Rohner. “With cavefish, we have a unique system where we can study what might happen if people remained couch potatoes over very, very long periods of time.”



Video Credit: Stowers Institute for Medical Research



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Cavefish are healthy despite their sedentary lifestyle

[sendtonews key="vpljfR2VBX-2560867-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="MHyhtebibJ-2200368-12187" type="single"]</div>



Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> some of the most incredible waves in the world, as seen by Landsat satellites.



"With more than 370,000 miles of coastline on Earth, there are plenty of places where epic waves build up, curl over, and hurtle toward the shore.- much to the thrill of surfers," says NASA. "There are some places where these waves are so magnificent that they can be seen from space."



"With the broad perspective of satellites, we can see how these iconic waves develop into the world’s tallest, longest, fastest, and heaviest."



Video Credit: NASA Earth Observatory&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Satellites capture the world's biggest and fastest waves

[sendtonews key="MHyhtebibJ-2200368-12187" type="single"] Today’s Video of the Day from NASA...

News coming your way