Coffee is prized for its taste and mental boost. A new study shows that caffeine may also fine‑tune the internal clock that makes cells grow old.



Researchers observed that yeast aged more slowly when caffeine altered the same energy pathways that help human cells <a href="https://www.earth.com/news/organ-aging-can-predict-diseases-decades-in-advance/">survive</a> under stress.



<h2 class="wp-block-heading" id="h-caffeine-slows-aging-in-yeast-cells">Caffeine slows aging in yeast cells</h2>



Dr. Charalampos (Babis) Rallis of <a href="https://www.qmul.ac.uk/">Queen Mary University of London</a> focused on the yeast species Schizosaccharomyces pombe because its DNA repair and growth controls echo our own. 



The team logged changes in <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9139625/" target="_blank" rel="noreferrer noopener">chronological lifespan</a>, the length of time that non‑dividing cells stay viable, then mapped the molecular traffic that caffeine set in motion.



“This is our most exciting find to date,” said Dr. Rallis. The results point to a fuel‑sensing <a href="https://www.earth.com/news/healthy-aging-how-some-people-live-past-100-years/">pathway</a> that kicks in when nutrients dip, mirroring how people burn stored energy between meals.&nbsp;



<h2 class="wp-block-heading" id="h-yeast-helps-us-understand-aging">Yeast helps us understand aging</h2>



Fission yeast may seem worlds apart from humans, but it shares many core <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC4772020/" target="_blank" rel="noreferrer noopener">regulatory pathways</a> found in our cells. Systems like <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC2779044/" target="_blank" rel="noreferrer noopener">AMPK</a> and <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC3241408/" target="_blank" rel="noreferrer noopener">TOR</a> have been conserved over hundreds of millions of years because they work so well.



This makes yeast an ideal testing ground for decoding how compounds like caffeine affect <a href="https://www.earth.com/news/scientists-are-experimenting-with-new-approach-to-fight-and-stop-human-aging-necrosis/">lifespan</a> and stress response. What happens in a petri dish often sparks questions that ripple out to animal models and eventually to people.



<h2 class="wp-block-heading" id="h-how-caffeine-may-slow-aging">How caffeine may slow aging</h2>



The key player is AMPK, an enzyme that "notices" when the cell’s ATP (energy) balance tilts toward empty and then shifts metabolism to survival mode. 



“Caffeine helps flip that switch,” said <a href="https://scholar.google.com/citations?user=913OCBIAAAAJ&amp;hl=en" target="_blank" rel="noreferrer noopener">Dr. John‑Patrick Alao</a>, the postdoctoral scientist who ran the experiments.



Earlier <a href="https://pubmed.ncbi.nlm.nih.gov/23551936/" target="_blank" rel="noreferrer noopener">work</a> suggested caffeine blocked <a href="https://pubmed.ncbi.nlm.nih.gov/23551936/" target="_blank" rel="noreferrer noopener">TOR</a>, a growth promoter, but new data reveal the compound reaches TOR indirectly by first waking up AMPK. 



Cells then slow growth, patch damaged DNA, and boost antioxidant defenses, the very responses that lengthen life in many lab organisms.



<h2 class="wp-block-heading" id="h-caffeine-and-metformin-use-same-pathway">Caffeine and metformin use same pathway</h2>



<a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC6779524/" target="_blank" rel="noreferrer noopener">Metformin</a>, the common diabetes drug, also charges AMPK and is being tested as a geroprotector in humans. The overlap hints that coffee’s benefits may parallel those seen in metformin cohorts, though dosage and metabolism differ widely.



Both agents dial back inflammation, clear out faulty proteins through autophagy, and keep insulin signaling from running too hot. 



If future trials confirm safety, researchers may combine low‑dose caffeine with metformin analogs to see whether their effects stack without side effects.



<h2 class="wp-block-heading" id="h-caffeine-helps-manage-cell-stress">Caffeine helps manage cell stress</h2>



The AMPK pathway doesn’t just manage fuel, it also guides how cells respond to <a href="https://www.ncbi.nlm.nih.gov/medgen/222489" target="_blank" rel="noreferrer noopener">genotoxic stress</a>, such as radiation or chemicals that harm DNA. 



The yeast data showed caffeine increased sensitivity to DNA damage in some mutants, revealing AMPK's role in damage response.



This dual role, energy control and DNA repair, suggests that caffeine tunes both survival and quality control systems. 



It’s part of a wider stress adaptation strategy that has been conserved across <a href="https://www.earth.com/news/scientists-discover-a-protein-that-reverses-cellular-aging/">evolution</a>, and is now offering new angles for anti-aging research.



<h2 class="wp-block-heading" id="h-people-who-drink-coffee-may-live-longer">People who drink coffee may live longer</h2>



Observational work involving hundreds of thousands of adults links two to four cups of coffee daily with <a href="https://pubmed.ncbi.nlm.nih.gov/31055709/" target="_blank" rel="noreferrer noopener">lower all‑cause mortality</a>. 



Separate <a href="https://pubmed.ncbi.nlm.nih.gov/34468722/" target="_blank" rel="noreferrer noopener">analyses</a> in Asian populations find similar protection against heart disease and several cancers.



Because these studies track behavior, not biology, confounding factors like diet, exercise, and income can cloud cause and effect. 



The yeast data now give those population numbers a plausible mechanism anchored in cell chemistry, without the noise of other factors.



<h2 class="wp-block-heading" id="h-future-research-on-caffeine-and-aging">Future research on caffeine and aging</h2>



Yeast tolerate caffeine levels far above a latte, so dose matters when translating findings to people. 



Human AMPK is embedded in tissues that react differently, so benefits in muscle may come at a cost elsewhere if DNA repair stalls during caffeine peaks.



High caffeine can raise blood pressure, trigger anxiety, and interfere with sleep - processes that can speed cell aging if left unchecked. 



Clinical trials that track AMPK activation, cardiovascular markers, and cognitive scores together will be needed before doctors advise specific amounts.



<h2 class="wp-block-heading" id="h-the-role-of-diet-and-exercise">The role of diet and exercise </h2>



Exercise is one of the most well-known ways to activate AMPK in humans. When muscles burn through energy during physical activity, this pathway turns on to help cells adapt and recover.



Certain foods, including those high in polyphenols like berries and green tea, may also give AMPK a nudge. 



Understanding how diet and lifestyle naturally influence this system could lead to everyday habits that support healthy aging.



<h2 class="wp-block-heading" id="h-a-healthy-lifestyle-matters">A healthy lifestyle matters</h2>



For now, moderate coffee remains a safe pleasure that lines up with epidemiology and basic science. Sleepless nights and energy drinks loaded with sugar still pose risks that no enzyme tweak can erase.



Nutrient‑sensing pathways such as AMPK give researchers a roadmap for therapies, yet lifestyle, steady sleep, balanced diet, and movement, keep the road free of potholes. 



The next wave of studies may explore caffeine analogs that lock onto AMPK with precision, separating the perks from the jitters.



The study is published in <a href="https://microbialcell.com/researcharticles/2025a-alao-microbial-cell/" target="_blank" rel="noreferrer noopener">Microbial Cell</a>.



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Scientists learn that caffeine could slow cellular aging under the right conditions

Coffee is prized for its taste and mental boost. A new study shows that caffeine may also fine‑tune the internal clock that makes cells grow old. Researchers observed that yeast aged more slowly when caffeine altered the same energy pathways that help human cells survive under stress. Caffeine slows aging in yeast cells Dr. Charalampos (Babis) Rallis of Queen Mary University of London focused on the yeast species Schizosaccharomyces pombe because its DNA repair and growth controls echo our own. The team logged changes in chronological lifespan,...

A new study has revealed that sandwiches are having a substantial impact on <a href="https://www.earth.com/news/oceans-buffer-greenhouse-gas/">greenhouse gas emissions</a>. In the first study of its kind, researchers at <a href="http://www.manchester.ac.uk/">The University of Manchester</a> have tracked the carbon footprint of a sandwich by examining its entire life cycle including production, packaging, and food waste.

The research team focused on 40 sandwich recipes for their investigation. The highest carbon footprints were found in sandwiches that contained bacon, ham, or sausage, as well those made with cheese or prawns. 

The most carbon intensive process was discovered in sandwiches served on all-day breakfast menus that include eggs, bacon, and sausage. The study revealed that the production of just one of these sandwiches generates a carbon dioxide equivalent (CO2 eq.) that is comparable to driving a car for 12 miles.

The lowest carbon footprint was found in a sandwich made at home with ham and cheese. Furthermore, the study demonstrated that sandwiches made at home could reduce carbon emissions in half compared to eating out.

According to the British Sandwich Association (BSA), more than 11.5 billion sandwiches are consumed each year in the UK. Around half of those are made at home and the other half are bought in shops, supermarkets, and service stations.

“Given that sandwiches are a staple of the British diet as well as their significant market share in the food sector, it is important to understand the contribution from this sector to the emissions of greenhouse gases,” said study co-author Adisa Azapagic.

“For example, consuming 11.5 billion sandwiches annually in the UK generates, on average, 9.5 million tonnes of CO2 eq., equivalent to the annual use of 8.6 million cars.”

The researchers established that the biggest contributor to the carbon footprint of a sandwich is the agricultural production and processing of the ingredients, which generates up to 67 percent of the CO2 eq. for fast food sandwiches. In addition, the refrigeration of sandwiches in the supermarket can account for up to 25 percent of their overall contribution to emissions.

“We need to change the labelling of food to increase the use-by date as these are usually quite conservative,” said Professor Azapagic. “Commercial sandwiches undergo rigorous shelf-life testing and are normally safe for consumption beyond the use-by date stated on the label.”

The study authors pointed out that reducing certain ingredients that have a higher carbon footprint such as cheese and meat would not only help to cut back on greenhouse gas emissions, but would also contribute to healthier diets with less calories.

The research is published in the <a href="https://www.journals.elsevier.com/sustainable-production-and-consumption/">Journal of Sustainable Production and Consumption</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Even your sandwiches have an environmental impact

A new study has revealed that sandwiches are having a...

Because young people today are the biggest users of <a href="https://www.earth.com/news/teens-sleep-social-media/">social media</a> of any age group, many are concerned about how social media may be impacting teens. 

Researchers from the<a href="https://www.birmingham.ac.uk/"> University of Birmingham</a> set out to investigate what effect social media might have on healthy habits for young people. 

While social media can have a positive impact on health, with access to information and fitness apps, the researchers also found some dangers of social media pertaining to peer pressure. 

The results show that even though teenagers are often critical of celebrity-endorsed products and the airbrushed perfection of celebrity selfies, following their peers online can lead to negative body image, the feeling peer pressure, and low self-worth. 

The study was published in the journal Sport, Education and Society. 

The researchers asked 1,296 people ages 13 to 18 from British schools about their online habits with regard to health-related social media. 

The team outlined several health categories, including physical activity, diet/nutrition, body image and sleep. 

Interestingly, while the study participants proved themselves to be critical of celebrity health endorsements or celebrity selfies, content shared by peers had a much deeper impact. 

“'One of the issues we saw in this report were selfies, which, because they are coming from other young people, heighten the level of peer pressure,” said Victoria Goodyear, the study’s lead author. “They might compare themselves to others from school if they have low self-esteem or have had a bad day, although not every child will do so. These images may have been filtered, but they focus on body parts, diet, and exercise, which may create pressure.”

The study shows that due to social media, peer pressure is a problem that spreads beyond the classroom. While the younger generation has developed a critical eye, the accessibility of social media means they are confronted with social pressure even outside of school. 

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com </a>Staff Writer

Young people are social media savvy, but still pressured by peers

Because young people today are the biggest users of social...

Many people pledge to reduce their <a href="https://www.earth.com/news/drinking-alcohol-cancer-dna/">alcohol</a> intake in the month of January, and a team of researchers from the <a href="http://www.bristol.ac.uk/">University of Bristol</a> set out to determine how successful drinkers are in following through with these resolutions. The study revealed that very few individuals who attempted to reduce their alcohol consumption managed to do so after six months.

The experts analyzed data on the alcohol intake patterns of nearly 3,000 drinkers for the research, which was funded by the <a href="http://sphr.nihr.ac.uk/">NIHR School for Public Health Research</a>. Around 20 percent of the drinkers who were interviewed for the study reported a desire to cut back. The participants were most commonly motivated to drink less in an effort to lose weight, improve fitness levels, save money, or avoid health problems.

The researchers followed up with the individuals six months later, and found that those who had not set out to cut back on their drinking had reduced their alcohol consumption by the same amount as those who aimed to reduce their alcohol intake.

The study was led by Dr. Frank De Vocht from Bristol Medical School.

“Alcohol consumption is of particular concern to the UK's public health,” said Dr. De Vocht. “We wanted to find out if motivation alone changes limiting intake. Sadly, although people start with good intentions, our results suggest that something more is required for those intentions to make a difference.”

“For people who are serious in their intention to reduce consumption, obtaining structural support, for example by signing up to the Dry January campaign, may help. Alternatively, smartphone apps are also being tested as a way to help people reduce their intake, but it's too early to say whether these can make a difference.”

The research is published in the journal <a href="https://www.psychologytoday.com/basics/addiction">Addiction</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Most drinkers who wish to cut back struggle with follow through

Many people pledge to reduce their alcohol intake in the...

Childhood obesity is a growing problem in the United States, and according to the <a href="https://www.cdc.gov/obesity/data/childhood.html">Centers for Disease Control</a> (CDC), it disproportionately affects children from low-income families. 

The CDC also reports that nearly one in five children between the ages 6 and 19 is obese. 

Many factors contribute to childhood obesity, but new research has found that poor sleep quality leads to a higher body mass index (BMI). 

The study was carried out by researchers from <a href="https://www.massey.vcu.edu/">The Virginia Commonwealth University Massey Cancer Center</a>. 

As <a href="https://www.earth.com/news/rise-obesity-mortality-rates/">obesity</a> rates climb, so do the risks of cancer.

"Childhood obesity very often leads to adult obesity," said Bernard Fuemmeler, the study's lead author. "This puts them at greater risk of developing obesity-related cancers in adulthood."

It’s been previously proven that poor sleep is connected to adult obesity, but less research has been done on the link between childhood obesity and sleep habits.

The researchers enrolled 120 children from the Newborn Epigenetic Study, which examines how environmental exposures and nutrition affect genes. 

The children were asked to wear accelerometers for five days in order to track sleep-wake cycles and given the “eating in the absence of hunger test.” The hunger test asks participants to eat until they feel full and allowed the researchers to better understand the children's eating habits.

After analyzing both sleeping and eating habits in the study participants, the researchers discovered that shorter sleep and restless sleep was linked to a higher BMI and bigger waist size. 

If a child got more sleep, every extra hour of sleep was linked to a decreased BMI. The results also showed that less sleep led to a higher intake of calories.

"Today, many children are not getting enough sleep," Fuemmeler said. "There are a number of distractions, such as screens in the bedroom, that contribute to interrupted, fragmented sleep. This, perpetuated over time, can be a risk factor for obesity."

The researchers hope their results will help create new treatments to prevent childhood obesity and the increased risk of cancer related to obesity. 

-

By<a href="mailto:kayvandette@gmail.com"> Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com</a> Staff Writer

Poor sleep quality linked to childhood obesity

Childhood obesity is a growing problem in the United States,...

Researchers at the <a href="https://www.umkc.edu/">University of Missouri-Kansas City</a> set out to determine out what women perceive to be the ideal female figure in the United States. The study revealed that women are now finding muscular and toned bodies to be more desirable over extremely thin bodies.

The research team focused its study on the Miss USA competition, where contenders are primarily judged on their appearance and also how well they fit into today's beauty standards. The experts showed images of pageant winners from 1999 to 2013 wearing two-piece swimsuits to 78 undergraduate female students.

The study participants rated the <a href="https://www.earth.com/news/women-neural-activity-sexually/">women</a> according to how muscular, thin, and attractive they were. The more recent pageant winners received the highest ratings, and the team noted that these particular women have become increasingly muscular over the past 15 years.

Next, the researchers analyzed whether the long-held ideal of extreme thinness is evolving to include enhanced muscle tone. A separate group of 64 undergraduate students were shown pairs of photographs featuring 14 women. Each pair of images was identical in every way except that the muscular definition of the woman's body was digitally removed in one picture, leaving a “thin only" image and a “thin and toned" image.

The images were first shown separately, and the study participants rated both versions of the picture as being equally attractive. When the pairs of images were shown side-by-side, however, the muscular images were more appealing to the participants.

“There is a shift in the thin ideal female figure to one that now includes the appearance of physical fitness via muscularity,” said Bozsik. She explained that the findings of the study are consistent with the growing preference for a toned and thin female figure that is commonly portrayed now in the “fitspiration" trend on social media.

“These websites allow individuals to collect images of women with whom they identify or admire, essentially allowing them to cultivate their own media repertoire of highly salient thin and fit media,” said Bozsik. “This process of selecting preferred images and then narrowing the media focus by placing these images on their 'boards' may inadvertently increase the risk of developing higher levels of body dissatisfaction, as well as subsequent disordered-eating behaviors that are linked to it.”

The study is published in Springer's journal <a href="http://www.springer.com/psychology/journal/11199">Sex Roles</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

New beauty standards prefer healthy and toned over skinny

Researchers at the University of Missouri-Kansas City set out to...

Researchers at <a href="http://www.tcd.ie/">Trinity College Dublin</a> have taken a closer look at the genetic diversity of the Irish population. The experts have discovered a hidden genetic footprint that was formed by both geography and historical migrations.

Ireland has been inhabited for 10,000 years. While cultural and geographical differences have been established, there has been no distinction made between various genetic groups across the country.

The current study assembles a new image of the genetic landscape of <a href="https://www.earth.com/image/clew-bay-islands-western-ireland/">Ireland</a> which is quite complex. The findings clearly show the genetic signatures left behind within Irish populations by historical migrations.

“This subtle genetic structure within such a small country has implications for medical genetic association studies,” said study co-author Ross Byrne. “As it stands, current corrections for population structure in study designs may not adequately account for this within country variation, which may potentially lead to false positive results emerging.” 

The researchers analyzed genetic variation across nearly 1,000 Irish genomes and compared them with over 6,000 genomes from Britain and mainland Europe. The experts discovered 23 distinct Irish genetic groups separated by geography. 

The groups were found to be the most discernible in western Ireland, but less prominent in the east. In eastern Ireland,  historical migrations have eliminated the genetic divisions.

Genetic contributions from British people were found to drop off in populations to the west. Genetic input from Europe revealed the timeline of the historical migrations of the Norse-Vikings and the Anglo-Normans to Ireland, and these dates were consistent with historical records.

“The long and complex history of population dynamics in Ireland has left an indelible mark on the genomes of modern inhabitants of the island,” said study co-author Russell McLaughlin. 

“We have shown that, using only genetic data, we can accurately reconstruct elements of this past and demonstrate a striking correlation between geographical provenance and genetic affinity. Understanding this fine-grained population structure is crucially important for ongoing and future studies of rare genetic variation in health and disease.”

The study is published in <a href="http://journals.plos.org/plosgenetics/">PLOS Genetics</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Irish genetic patterns rooted in historical migrations

Researchers at Trinity College Dublin have taken a closer look...

Scientists have moved the Doomsday Clock another 30 seconds forward, and it’s now just 2 minutes to midnight. This marks the closest we as humanity has come to a possible apocalypse since the Cold War. 

The Doomsday Clock was originally created by the <a href="https://thebulletin.org/">Bulletin of the Atomic Scientists</a>, a group of Manhattan Project veterans who were fearful of the consequences their work on nuclear weapons would have. 

The Doomsday Clock was first formed in response to the looming threats of nuclear warfare, and its movement is determined by the state of global affairs, the nuclear arsenals onhand, and the power wielded by government rulers

Today the Bulletin of Atomic Scientists is a wide-reaching organization of nuclear experts, scientists, and even Nobel Laureates who regularly meet to discuss the current global political and economic climate and the increased risks of nuclear threats. 

The Bulletin has also taken climate change into consideration, calling it as big a threat to humanity as nuclear weapons.

 In 2007, it was <a href="https://www.earth.com/news/climate-change-removed-websites/">climate change</a> that inspired the move to five minutes to midnight. 

Today the clock lurched another 30 seconds forward thanks to rising temperatures and the increased rhetoric involving nuclear warfare. 

It's now two minutes to midnight, a sobering move since that last time the clock was that close to midnight, the panic of the Cold War was at its peak. 

One of the driving forces cited by the experts leading up the clock’s new position was the clashing of President Trump and Kim Jong Un, who have been locked in a seemingly petty quarrel while carelessly waving the threat of nuclear weapons back and forth. 

“We have members of Congress, White House advisers, and even the president implying that they think war with a nuclear state is not only likely, but potentially desirable,” Alex Wellerstein, an expert in nuclear weapon history told the <a href="https://www.washingtonpost.com/news/speaking-of-science/wp/2018/01/25/after-a-missile-scare-and-insult-war-with-north-korea-its-time-to-check-the-doomsday-clock/?utm_term=.179f2804012b">Washington Post</a>. “That's unusual and disturbing.”

If the Doomsday Clock moves any closer to midnight, we as a globe will be in uncharted territory, even though the clock is not a predictor of the apocalypse, but a reflection of current events and imminent risks. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette,</a> <a href="https://www.earth.com/">Earth.com</a> Staff Writer

The Doomsday Clock ticks closer to midnight apocalypse

Scientists have moved the Doomsday Clock another 30 seconds forward,...

Few things are more satisfying than swatting a particularly annoying <a href="https://www.earth.com/news/mosquitoes-suck-blood-noticing/">mosquito</a> that’s been buzzing around you on a hot, summer day. And while it may seem like a missed swat attempt is a lost opportunity to get rid of the offending insect, new research finds that this may not be the case. 

A recent study published in <a href="http://www.cell.com/current-biology/home">Current Biology</a> found that mosquitoes were able to learn to associate a particular odor with the unpleasant feeling of being swatted — causing them to avoid the scent in the future. 

It’s been known that mosquitoes don’t exactly bite at random, as they show clear preferences for some people over others. They are also know to alternate hosts seasonally, generally feeding on birds in the summer and mammals and birds during the rest of the year. Researcher Jeffrey Riffell of the <a href="http://www.washington.edu/">University of Washington, Seattle</a> wanted to find out more about what factors influence a mosquitoes’ biting preferences.

Riffell and his colleagues trained mosquitoes by combining the odor of a specific person or animal species with a mechanical shock, simulating the shock by using a vortexer machine. Surprisingly, the insects quickly learned to associate a host odor with the mechanical shock, and would fly away from the odor once this association was made. “Once mosquitoes learned odors in an aversive manner, those odors caused aversive responses on the same order as responses to DEET, which is one of the most effective mosquito repellents,” says Riffell. “Moreover, mosquitoes remember the trained odors for days.”

It is well known that in many animals learning depends on dopamine in the brain. To test this in mosquitoes, the researchers glue the insects to a custom 3D-printed holder that allowed the insects to fly in place while the neuronal activity in the olfactory center of their brains was recorded. The neurons in the olfactory center of genetically modified mosquitoes lacking dopamine receptors were less likely to fire compared to normal mosquitoes. Because of this, these mosquitoes showed a decreased ability to process and learn from odor information.

These findings could have important implications for mosquito control and the eradication of mosquito-borne diseases that affect millions each year. 

“By understanding how mosquitoes are making decisions on whom to bite, and how learning influences those behaviors, we can better understand the genes and neuronal bases of the behaviors,” explains Riffell. “This could lead to more effective tools for mosquito control.”

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By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Swatting mosquitoes helps them learn to avoid your scent

Few things are more satisfying than swatting a particularly annoying...

As <a href="https://www.earth.com/news/legal-recreational-marijuana-california/">marijuana</a> becomes increasingly legalized in states across the United States, it has created new challenges to policing the impairment level of drivers on the road. While recent studies have identified new biomarkers that can be used to estimate an individual’s cannabinoid intake, a commentary published by toxicologists in the journal <a href="http://www.cell.com/trends/molecular-medicine/home">Trends in Molecular Medicine</a> says that using these markers to judge cognitive and behavioral impairment can be complex.

“There is no one blood or oral fluid concentration that can differentiate impaired and not impaired,” explains Marilyn Huestis, who spent over 20 years leading cannabinoid-related research projects at the<a href="https://www.drugabuse.gov/"> National Institute on Drug Abuse</a>. “It’s not like we need to say, ‘Oh, let’s do some more research and give you an answer.’ We already know. We’ve done the research.”

Whether the primary psychoactive agent in cannabinoids – ∆9-tetrahydrocannabinol (THC) – is inhaled or consumed, there are a variety of factors that can influence how impaired an individual may be. And although alcohol can impair a driver more than cannabis, impairment is still a problem when it comes to driving while high.

One problem with trying to use blood tests for THC is that it quickly leaves the bloodstream. An occasional user may be impaired for 6 to 8 hours, but blood THC concentrations can drop to zero after just 2.5 hours, according to previous research by Huestis. “If someone is driving impaired, by the time you get their blood sample, you've lost 90% or more of the drug. So, we have to change what we do at the roadside,” she says.

Furthermore, long-term daily cannabis users – such as those who use medical marijuana – present additional challenges. THC accumulates in body tissues and then slowly releases over time. This means that chronic users can test positive for marijuana even if they’ve gone 30 days without using. Additionally, psychomotor impairment can be observed even three weeks after the last dose. “You want people to be taking medicinal cannabinoids and now you know that their driving is going to be impacted,” says Huestis. “So how do you handle that problem?”

Like most researchers, Huestis doesn’t support a legal driving limit for marijuana, like the one in place for blood alcohol concentrations. Rather, she believes the best solution is to train police officers to identify behavioral signs of impairment, accompanied by less invasive biological marker tests that can be immediately performed at the roadside to confirm the presence of a cannabinoid. Recent research has identified new blood and urine biomarkers to that end. Tests using breath and saliva markers are also under development.

Beyond just catching drivers who are under the influence, these new markers and tests may also be used to help treat drug dependence, as they can determine appropriate therapeutic levels of medical marijuana. They could also be used to help women monitor cannabinoid levels if they’re trying to become pregnant. While potentially tricky and complex, this new research is helping people who use or need medical marijuana, as well as the general public that want to stay safe on the road.

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By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Developing a roadside marijuana DUI test has proven tricky

As marijuana becomes increasingly legalized in states across the United...

Musical genres, tastes, and sounds vary across cultures and serve a wide variety of purposes, from evoking the need to dance to expressing love or lulling a baby to sleep. It is a widely held belief that <a href="https://www.earth.com/news/musical-training-perception-speech/">music</a> is mainly shaped by culture, but researchers from <a href="https://www.harvard.edu/">Harvard University</a> weren’t entirely sure that was the whole picture. Throughout the animal kingdom, vocalization carries links between form and function between different species – there’s a reason we experience fear after hearing a bear or lion roar. The researchers wanted to see if this same relationship between form and function was true for our human music.

After analyzing recordings from around the world, the research team found vocal songs tend to sound similar to one another, no matter which culture they come from. Their study involved two separate experiments to determine a relation between form and function in music, and the findings were published in <a href="http://www.cell.com/current-biology/home">Current Biology</a>.

The first experiment involved 750 internet users in 60 countries being asked to listen to brief song recordings. These sound bites were selected pseudo-randomly from 86 predominantly small-scale societies – from hunter-gatherers to subsistence farmers. After listening to each piece, participants answered six questions indicating what they believe the function of each song to be on a six-point scale. These questions determined the degree to which the listener thought a song was used for dancing, soothing a baby, healing an illness, expressing love, mourning the dead, or telling a story. None of the songs were actually used in mourning or to tell a story, but these answers were included to discourage listeners from assuming each song fit into only four types.

Despite the participants’ lack of familiarity with the songs and their societies of origin, their ratings showed accurate and cross-culturally reliable inferences about the purposes of these songs. 

“We show that our shared psychology produces fundamental patterns in song that transcend our profound cultural differences,” says co-first author of the study Manvir Singh, of Harvard University. “This suggests that our emotional and behavioral responses to aesthetic stimuli are remarkably similar across widely diverging populations.”

In the second experiment, 1,000 internet users from the U.S. and India were asked to rate these same excerpts for three “contextual” features: number of singers, gender of singer(s), and number of instruments. They also rated them for seven “subjective” musical features: melodic complexity, rhythmic complexity, tempo, steady beat, arousal, valence, and pleasantness. The results of this second experiment showed that there was some relationship between these features and song function, but it could not explain the way people in the first experiment reliably detected a song’s function.

Overall, these findings are consistent with the existence of universal links between form and function in vocal music. 

“Despite the staggering diversity of music influenced by countless cultures and readily available to the modern listener, our shared human nature may underlie basic musical structures that transcend cultural differences,” says co-author Samuel Mehr, also of Harvard University.

The researchers are now conducting these tests in listeners who live in isolated, small-scale societies and have never heard music outside of their own culture. They are also continuing to analyze the music of many cultures in order to figure out how certain musical features relate to function, and whether those features themselves might be universal.

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By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Science proves that music is truly a universal language

Musical genres, tastes, and sounds vary across cultures and serve...

There has always been debate surrounding whether people are born “smartypants” or if intelligence something that is attained through hard work and focus. Are human behaviors and development found in our DNA or do external environmental factors shape us? 

These questions make up the basis of the nature versus nurture debate, which has long been of interest to many in the scientific community. But now, new research has found that to some extent, intelligence is in our genes. 

The study was conducted by researchers from the <a href="https://www.ed.ac.uk/">University of Edinburgh</a> and is the first-ever study to show how genetic differences, or variants as they are called, in DNA can determine intelligence. 

For the study, the researchers analyzed genetic markers in the <a href="https://www.earth.com/news/dna-onvict-rhinoceros-hunters/">DNA</a> of 20,000 people looking specifically for any indicators that would match higher or lower IQs or reflect intelligence. 

The researchers identified rare genetic variants that appeared to have a determining effect on whether someone was intelligent or not, and these combined variants explained half of the differences in intelligence between the subjects in the study. 

The study examined and analyzed both common and rare variants, but it was the rare variants that appeared to have a greater impact on intelligence. 

“We used two methods to measure the effect that rare variants had on intelligence,” said Dr. David Hill, a member of the research team. “By combining the effect of both rare and common variants, more than 50% of the differences in intelligence between people could be traced to their genes.” 

While a person certainly can’t be born with information or an education, the new research shows that perhaps some get a headstart simply through a genetic gift.

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com</a> Staff Writer

Intelligence can be inherited through our genes

There has always been debate surrounding whether people are born...

Valence is a term used to describe the good and bad feelings that neurons assign to different experiences, tastes, or sensations in the amygdala part of the brain. 

Valence helps us discern bad smells and bitter tastes from good ones by assigning emotions to them. But how does the brain define good and bad tastes and experiences? 

Now, new study examines exactly how valence assignment occurs in the amygdala and the neural circuitry involved. 

The study was conducted by researchers from the <a href="https://picower.mit.edu/">Picower Institute for Learning and Memory </a>and published in the journal Cell Reports. 

The researchers focused on the basolateral amygdala and were able to show which neurons were involved in the valence processing circuitry, how the neurons interacted, and where the neural response was located and projected to in the brain. 

For the study, the researchers gave trained lab mice sucrose and quinine drops to activate bitter and sweet tastes. 

The two tastes were given a different sound tone so the mice learned to associate the tastes with sound. After playing the tones, the researchers identified which neurons responded and mapped its corresponding valence assignment. 

Once the key neurons involved in valence assignment were identified, the researchers were able to make them responsive to pulses of light, which showed how the different neurons interacted in the basolateral amygdala and <a href="https://www.earth.com/news/brain-records-body-weight/">brain</a>. 

The results showed that positive valence was associated with the nucleus accumbens region of the brain and negative valence assignment was connected to the central amygdala. 

The inner workings of valence assignment could help with treatments and therapies for mental health disorders. 

“Perturbations of emotional valence processing is at the core of many mental health disorders,” said Kay Tye, the leader of the study. “Anxiety and addiction, for example, may be an imbalance or a misassignment of positive or negative valence with different stimuli.” 

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

How the brain discerns between like and dislike

Valence is a term used to describe the good and...

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.



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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...

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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



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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

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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;



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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

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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;



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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

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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;



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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

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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



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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?

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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



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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

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

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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;



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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

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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;



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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"

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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;



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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

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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



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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

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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



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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

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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



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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

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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)



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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...

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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;



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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



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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...

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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;



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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

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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



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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...

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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



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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

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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;



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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

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