A new investigation at a high‑Andean temple reveals that the distant ancestors of the Inca wielded psychoactive plants as a political tool. 



Archaeologists have uncovered bone tubes still coated with traces of mind‑altering snuff, showing that Chavín lords used controlled visions to cement their rule almost three millennia ago.



The discovery comes from a project led by researchers at the <a href="https://www.ufl.edu/">University of Florida</a>, <a href="https://www.stanford.edu/">Stanford University</a>, and partner institutions across South America. 



The experts analyzed artifacts from Chavín de Huántar, a vast ceremonial center that sits 10,000 feet above sea level in the Peruvian Andes.



<h2 class="wp-block-heading" id="h-ancient-use-of-psychoactive-plants">Ancient use of psychoactive plants</h2>



Inside narrow passageways and hidden rooms, the team found small hollow bones carved into elegant inhalation tubes. 



Chemical testing detected nicotine from wild tobacco relatives and residue from vilca beans, whose potent compounds are related to DMT.



Microscopic work confirmed plant particles embedded in the ancient surfaces. The date of the deposits makes this the oldest direct evidence for psychoactive plant use yet known in the high Andes.



<h2 class="wp-block-heading" id="h-rituals-shaped-social-order">Rituals shaped social order</h2>



The placement of the tubes mattered. They were sealed within private chambers that could hold only a handful of people. That setting implies exclusive ceremonies, not widespread communal feasts.



The evidence matches a broader pattern of Chavín architecture, which funnels visitors through labyrinths toward dimly lit sanctuaries where sights, sounds, and fragrances overwhelm the senses.



“Taking psychoactives was not just about seeing visions. It was part of a tightly controlled ritual, likely reserved for a select few, reinforcing the social hierarchy,” said Daniel Contreras, an anthropological archaeologist at the University of Florida and a co‑author of the study.



<h2 class="wp-block-heading" id="h-chavin-rituals-meant-to-stun">Chavín rituals meant to stun</h2>



Stone corridors at Chavín already distort light and echo footsteps. Researchers have also recovered giant trumpets fashioned from imported conch shells. 



The deep blasts of those horns, amplified by the tunnels, would have rattled bone. Add intense <a href="https://www.earth.com/news/understanding-presence-hallucinations-impact-on-social-perception/">hallucinations</a>, and followers might have felt a raw presence of gods or spirits.



“The supernatural world isn’t necessarily friendly, but it’s powerful,” Contreras said. “These rituals, often enhanced by psychoactives, were compelling, transformative experiences that reinforced belief systems and social structures.”



By staging such events, leaders wrapped their authority in cosmic mystery. Participants emerged convinced that rank and building labor served a higher design. 



Craftspeople who carved the monumental granite slabs and farmers who fed the workforce likely saw themselves as part of a living myth, not as servants under duress.



<h2 class="wp-block-heading" id="h-belief-used-for-power">Belief used for power</h2>



“One of the ways that <a href="https://www.earth.com/news/wealth-inequality-began-shaping-human-societies-10000-years-ago/">inequality</a> was justified or naturalized was through ideology - through the creation of impressive ceremonial experiences that made people believe this whole project was a good idea,” Contreras said.



The snuff tubes thus fit a larger strategy. Earlier Andean settlements show few signs of strict hierarchy. By Chavín times, around 800 BCE, society had acquired priests, skilled artisans, and regional trade routes. 



Control over sacred knowledge, including plant lore, helped elites turn soft power into hard architecture and coordinated labor.



<h2 class="wp-block-heading" id="h-psychoactive-plant-mixture">Psychoactive plant mixture</h2>



Vilca beans grow in lowland forests far from Chavín’s icy heights. Their presence points to long‑distance exchange networks and to careful botanical skill.



When roasted, mixed with lime, and inhaled, the powder produces vivid visions, rapid heartbeat, and disorientation. 



Wild tobaccos add <a href="https://www.earth.com/news/nicotine-pouches-are-a-new-dangerous-trend-among-teens/">nicotine</a>’s stimulant rush and sharp aroma. Combined, these plants could propel users into what seemed another realm.



<h2 class="wp-block-heading" id="h-bringing-invisible-details-to-light">Bringing invisible details to light</h2>



Contreras has worked at the site for nearly 30 years in a project directed by Stanford archaeologist John Rick.



Their excavations have mapped hidden galleries, sculpted stone icons, and water channels that once gurgled beneath temple floors. The new chemical analyses bring invisible details to light, showing not only what people did but also what they felt.



“It’s exciting that ongoing excavations can be combined with cutting‑edge archaeological science techniques to get us closer to understanding what it was like to live at this site,” Contreras said.



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



The Chavín phenomenon spread a shared artistic style and worldview up and down the Peruvian coast and sierra. Later Andean states inherited its taste for grand plazas, stone imagery, and elite ritual.



By demonstrating the intentional use of psychoactive plants in tightly managed settings, the study bridges the gap between small egalitarian hamlets and the vast empires that eventually ruled the Cordillera.



<h2 class="wp-block-heading" id="h-a-modern-glimpse-of-ancient-minds">A modern glimpse of ancient minds</h2>



Today, visitors to Chavín de Huántar walk through restored corridors where carved fangs and staring eyes still pierce the dim light. 



Knowing that select priests once knelt here, inhaled potent smoke, and proclaimed cosmic truths changes how we read those walls.



The <a href="https://www.earth.com/news/archaeologists-find-hallucinogenic-seeds-in-ancient-bones-black-henbane/">bone</a> tubes, simple yet sophisticated, remind us that chemistry, belief, and social order have long been intertwined. In the high Andes, <a href="https://www.earth.com/news/meditation-reveals-common-altered-states-of-consciousness/">altered consciousness</a> was more than a personal journey - it was statecraft written in breath and stone.



The study is published in the journal <a href="https://www.pnas.org/doi/10.1073/pnas.2425125122">Proceedings of the National Academy of Sciences</a>.



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How psychoactive plants helped build an ancient empire

A new investigation at a high‑Andean temple reveals that the distant ancestors of the Inca wielded psychoactive plants as a political tool. Archaeologists have uncovered bone tubes still coated with traces of mind‑altering snuff, showing that Chavín lords used controlled visions to cement their rule almost three millennia ago. The discovery comes from a project led by researchers at the University of Florida, Stanford University, and partner institutions across South America. The experts analyzed artifacts from Chavín de Huántar, a vast ceremonial center that sits 10,000 feet above sea...

According to a new report from the <a href="http://www.heart.org/">American Heart Association</a>, a healthy lifestyle is reflected in your brain as much as it is in the rest of your body. A healthy lifestyle can lessen the risk of cognitive impairment, which limits healthy brain functions such as learning and remembering, communicating, making decisions, and solving problems.

As blood vessels become narrowed or blocked over the course of a person's life, the risk of atherosclerosis increases. This condition slowly and silently blocks the arteries and can prevent adequate blood flow to the brain and the heart, causing heart attacks and strokes. The experts published strategies to help avoid this and other diseases.

"Research summarized in the advisory convincingly demonstrates that the same risk factors that cause atherosclerosis, are also major contributors to late-life cognitive impairment and Alzheimer's disease. By following seven simple steps - Life's Simple 7 - not only can we prevent heart attack and stroke, we may also be able to prevent cognitive impairment," said vascular neurologist Philip Gorelick, M.D., M.P.H.

Created by the American Heart Association, <a href="http://www.heart.org/HEARTORG/Conditions/My-Life-Check---Lifes-Simple-7_UCM_471453_Article.jsp">Life's Simple 7</a> highlights a set of health factors that define and promote cardiovascular wellness. The authors of the advisory reviewed 182 studies to produce a list of seven ways to achieve and maintain ideal brain health.

The program advises individuals to manage blood pressure, control cholesterol, keep blood sugar normal, get physically active, eat a healthy <a href="https://www.earth.com/news/best-diet-longer-life/">diet</a>, lose extra weight, and quit smoking.

The report, which is published in the American Heart Association's journal <a href="http://www.medicalnewstoday.com/articles/7624.php">Stroke</a>, urges people to take these steps to foster a healthy brain as early as possible, because atherosclerosis can begin as early as childhood. 

"Studies are ongoing to learn how heart-healthy strategies can impact brain health even early in life," said Gorelick. While further research is needed, he believes "the outlook is promising."

The action items included in Life's Simple 7 meet three practical rules agreed upon by the panel as they pinpointed ways to improve brain health. The experts wanted to include health factors which could be measured, modified and monitored, according to Gorelick, and which could be easily accessed by healthcare providers who will inform patients of how to meet these goals.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Seven easy ways to keep your brain healthy

According to a new report from the American Heart Association,...

A special issue of <a href="http://www.apa.org/pubs/journals/amp/">American Psychologist</a>, a journal from the <a href="http://www.apa.org/">American Psychological Association</a>, features a collection of articles which emphasize the health benefits of close relationships. The compilation of studies is an effort to convince scientists and psychologists to join forces and make it a priority to bring public awareness to the health advantages of close relationships.

The introduction to the special edition is written by editor Christine Dunkel Schetter, PhD. 

"The articles in this special issue represent state-of-the-art work on the central issues in the study of close relationships and health. They draw from relationship science and health psychology, two areas of scientific inquiry with independent histories and distinct domains," writes Schetter. "The goal of this special issue is to bridge the gap between these two specialties to improve the quality and usefulness of future research and practice."

The article "Advancing Social Connection as a Public Health Priority in the United States” provides scientific evidence that feeling socially connected and participating in high-quality relationships are linked to a decreased risk of mortality. Despite these facts, the authors say that government agencies, healthcare providers, and health care funders have not made social connection a public health priority. The experts point out that frequent and intense loneliness affects as many as 43 percent of adults in the U.S. over age 60.

Another report included in the special issue is "Interpersonal Mechanisms Linking Close Relationships to Health." This article gives insight into how interpersonal processes influence <a href="https://www.earth.com/news/deportation-fears-american-children/">health</a> and disease. The authors say relationships can help protect against the negative effects of stress. Relationships can also foster positive emotions, personal growth and health-promoting behaviors.

Another article,"Childhood Close Family Relationships and Health," investigates how relationships early in life can affect one's health over the course of a lifetime. According to the authors, comforting relationships during childhood are linked to better physical health from infancy to adulthood. In addition, the impact of difficult health issues can be greatly reduced by close family relationships.

Other articles included in the special issue of the journal examine topics such as the increasingly complex biological pathways involved linking relationships to health. One article, for example, explains that a happy marriage can reduce the risk of coronary heart disease, while a stressful relationship can increase this risk.

Dunkel Schetter says that the “challenge remains to translate existing and future knowledge into interventions to improve social relationships for the benefit of physical and mental health.”

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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

Having close relationships helps you live a longer life

A special issue of American Psychologist, a journal from the...

Voter fraud and registration manipulation have been hot topics of concern on both sides of the aisle. But what happens when hackers use your identity to change your voting information?

A new <a href="http://www.harvard.edu/">Harvard</a> study has examined how hackers can access personal voter information, which can be bought online through both traditional resources the dark web. 

The researchers found that for a few thousand dollars, hackers could obtain enough data to change information where voters can register online, impersonate voters online, and target key demographics that would make <a href="https://www.earth.com/news/weather-temperature-election-outcomes/">voting</a> difficult for certain people, districts, or communities. 

For example, a hacker armed with enough data could potentially change the addresses of a number of voters who, upon going to the polls to vote, would be told that he or she was in the wrong location, or that they would have to fill out a different ballot. 

The study was conducted by Latanya Sweeney, Harvard professor of Government and Technology in Residence, in collaboration with research analyst Ji Su Yoo and graduate student Jinyan Zang.

Together, the researchers examined how vulnerable the US voting system is to hackers. The study details multiple channels that hackers could use for buying and finding sensitive voter information.

Data sets with lists of personal information can be purchased or obtained fairly easily the researchers noted. Contrary to what one might think, voter information, including addresses, gender, and political party affiliation, is publically accessible. 

All in all, the researchers spent $18,000 obtaining voter information from the 35 states that allow online registration. The information did not include social security numbers or driver's license numbers, although those lists can be purchased from commercial data brokers and from the dark web.

Sweeney was able to purchase two sets of data containing the personal identity information of most adult Americans for just a little over $1,000. 

“The money, I think that's a real shocker. In Ohio, the data is free - you can download it from the Web. And others who have purchased the data have made it freely available in an attempt to add transparency to the election process. Even data brokers who specialize in voter lists, $2,000 was the maximum, and they covered all 50 states,” said Sweeney. 

Sweeney urged that the point of the study was not to emphasize the major flaws in the voting system or the security measures invested in by the states. Instead. Sweeney said the information should be used to help close any gaps and halt potential future voter identity theft. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Online voter registration can be hacked to target key districts

Voter fraud and registration manipulation have been hot topics of...

Research from Australia and the Netherlands has revealed that listening to happy music affects creative cognition in a positive way. People may develop more unique ideas and innovative solutions while listening to <a href="https://www.earth.com/news/like-songs-dislike-others/">music</a> compared to those working in silence.

The study was conducted by by Simone Ritter from <a href="http://www.ru.nl/english/">Radboud University</a> and Sam Ferguson from the <a href="https://www.uts.edu.au/">University of Technology Sydney</a>. The researchers enlisted the help of 155 individuals who completed questionnaires before being divided into groups. Each group was exposed to a different type of music that was classified as either calm, happy, sad, or anxious. In addition, a control group was not exposed to music. 

The volunteers attempted various cognitive tasks that tested their divergent and convergent creative thinking. Original and useful solutions to a task earned the participants a high score in divergent creativity, while those who came up with the best possible solution to a task earned a high score in convergent creativity.

The study showed that listening to happy music promotes divergent creative thinking. The researchers define happy music as classical music that has a positive emotional valence and is high in arousal. These variables which constitute happy music may enhance flexibility in thinking. This inspires solutions that may never have been conceived in silence, according to the authors.

The study, which is published today in the open-access journal <a href="http://journals.plos.org/plosone/">PLOS ONE</a>, shows that creative cognition is boosted by music. The authors suggest that music could provide an inexpensive way to inspire creativity in both school and work settings. Future research could explore how different ambient sounds affect creativity in a diverse range of people, including participants with varying levels of experience in music.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Happy music stimulates creativity and outside-the-box thinking

Research from Australia and the Netherlands has revealed that listening...

Cosmetic companies tout products that slow aging and provide a more youthful look, but no cosmetic can reverse the damaging effects of Parkinson’s, cardiovascular disease, cancer, and other diseases related to <a href="https://www.earth.com/news/reverse-effecs-aging-brain/">age decline</a>. But now, new research from <a href="http://www.ucla.edu/">UCLA</a> scientists found a way to slow aging and extend the healthy lifespan of fruit flies. 

The key to the breakthrough was targeting mitochondria, the part of the cell in charge of growth and determining when the cell lives and dies. 

The study was conducted by Anil Rana, lead author and UCLA project scientist, and David Walker, senior author and UCLA Professor of Integrative Biology and Physiology.

As we age, damaged mitochondria build up in the brain, muscles, and other organs. The stored up mitochondria are the cause of many age related health problems. 

The researchers noticed that when fruit flies reach middle age, about a month into their typical two-month lifespan, their mitochondria starts to change shape, becoming thinner and more oblong. 

“We think the fact that the mitochondria become larger and elongated impairs the cell's ability to clear the damaged mitochondria, and our research suggests dysfunctional mitochondria accumulate with age, rather than being discarded,” said Walker. 

Walker and his colleagues removed the damaged mitochondria in fruit flies using two different methods, and both resulted in the fruit flies living longer with a healthier lifespan. 

For one method, the researchers increased Drp1 levels in the fruit flies. Drp1 is a protein vital to the aging process, and by increasing its levels, the researchers saw the long damaged mitochondria breaking up into smaller manageable pieces that were then discarded in the fruit flies. 

Breaking up damaged mitochondria gave the fruit flies more energy and endurance and increased their lifespans. 

In another method, researchers turned off a protein called Mfn, which stopped the damaged mitochondria from bonding together and turning into bigger pieces. This method also resulted in similar age slowing effects. 

“You can either break up the mitochondria with Drp1 or prevent them from fusing by inactivating Mfn. Both have the same effect: making the mitochondrial smaller and extending lifespan,” said Rana. 

Walker hopes this researcher can be extended to humans and effectively delay age related decline, halting the serious effects of age related diseases like Parkinson's, cardiovascular disease, and cancer. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Scientists can now slow aging and extend lifespan

Cosmetic companies tout products that slow aging and provide a...

The <a href="http://www.nhs.uk/">National Health Service</a> recommends that adults should be getting between seven and eight hours of sleep every night, but in the real world what percentage of adults are actually doing this? A recent study has found that adults who get less than five hours of <a href="https://www.earth.com/news/adhd-triggered-quality-sleep/">sleep</a> a night found it hard to function efficiently during the day. Inadequate sleep was revealed to lead to poor memory and increased risk of depression, stress, and anxiety.

The study was led by academic psychologists Anna Weighall and Ian Kellar of the <a href="http://www.leeds.ac.uk/">University of Leeds</a>. They analyzed data from a survey of sleeping habits encompassing over 1,000 adults from the UK. The study was conducted in collaboration with UK bed manufacturer, Silentnight. 

“A lot of previous sleep research has been based on lab studies - this is the first time we have surveyed people in their everyday lives,” says Weighall.

In their study, they looked at the relationship between quality and quantity of sleep, as well as the cognitive processes involving memory and recall. They also analyzed wider indicators of physical and mental wellbeing.

The results showed a significant relationship between poor sleep and reduced mental well-being. They also found a relationship between lack of sleep and increase in everyday memory problems. In participants that habitually slept less than five hours a night, these relationships were even stronger.

“There is now a very compelling case to say there is a strong relationship between getting a good night's sleep and experiencing better health, wellbeing and memory function,” says Weighall.

Kellar emphasizes that sleep needs to be treated as a public health priority; similar to how maintaining a healthy weight and eating a healthy diet are seen in the public eye. Scientists have known that sleep is necessary for laying down new memories and re-processing what is already “stored” in the brain.

These findings show that a significant portion of UK adults are sleep deprived, which could be a major public health issue. Weighall explains, “What is emerging is the debilitating impact of poor patterns of sleep. People who are not getting enough sleep are at risk of experiencing a much lower quality of life and it hinders their ability to function effectively when they are awake.”

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Poor quality of sleep linked to depression, stress, and anxiety

The National Health Service recommends that adults should be getting...

According to the <a href="https://www.nimh.nih.gov/index.shtml">National Institute of Mental Health</a>, approximately 18 percent of US adults have some form of an anxiety disorder, and women are 60 percent more likely to develop an anxiety disorder than men.

Anxiety disorders are among the most common mental health problems in the United States and can include Obsessive Compulsive Disorder (OCD), Post-traumatic Stress Disorder (PTSD), Generalized Anxiety Disorder, and specific phobias. 

While anxiety disorders are treatable, and a wide a range of medications are prescribed to sufferers, science is finding more and more that in the long term, these treatments cannot be solely relied upon to relieve symptoms, and some can have unpleasant side-effects. 

Coping methods such as mindfulness, meditation, psychotherapy, exercise, and art therapy have been shown to be even more effective than medication in treating anxiety. 

A new study presented at the <a href="https://www.ecnp.eu/">European College of Neuropsychopharmacology</a> Conference shows how coping methods are crucial in treating anxiety disorders. Those who have a strong coping system in place were found to have a greater sense of self-worth and be less likely to exhibit anxiety symptoms.

Specifically, the study examines how coping methods can help women deal with <a href="https://www.earth.com/news/marijuana-low-doses-relieve-stress/">anxiety</a>, especially those in deprived communities or adverse situations. 

Researchers from the <a href="https://www.cam.ac.uk/">University of Cambridge</a>, led by Olivia Remes, surveyed 10,000 women over the age of 40 taking part in a wide reaching study. 

The researchers assessed the participants’ mental and physical health and used census data to determine deprived living conditions. The research team also measured each woman’s sense of fulfillment and meaning in their lives. 

Of the 10,000 women participating, almost 300 (2.6 percent) had Generalized Anxiety Disorder. The researchers found that in deprived communities, women without coping skills were nearly twice as likely to have anxiety than those who lived in wealthier areas. 

But the women who had solid coping methods weren’t nearly as affected by anxiety no matter their living conditions. 

“Individuals with this sense of coherence, with good coping skills, view life as comprehensible and meaningful. In other words, they feel they can manage their life, and that they are in control of their life, they believe challenges encountered in life are worthy of investment and effort, and they believe that life has meaning and purpose. These are skills which can be taught,” said Remes. 

The new research has exciting implications for mental health professionals and for people suffering from anxiety disorders. Finding and learning coping methods can prove, as Remes shows, a more powerful therapy than medication. 

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By <a href="http://mailto;kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com </a>Staff Writer

Coping skills can alleviate anxiety better than medication

According to the National Institute of Mental Health, approximately 18...

A recent study from the <a href="http://www.uef.fi/en">University of Eastern Finland</a> has found that men may have a more difficult time than women when trying to kick the habit of drinking. Long-term <a href="https://www.earth.com/news/heavy-drinking-affects-men/">drinking</a> causes changes in a region of the brain associated with addiction and alcohol cravings in men, but those changes were not detected in women.

“We found more changes in brain electrical activity in male subjects than in females, which was a surprise, as we expected it would be the other way around,” said researcher Dr. Outi Kaarre.

Previous studies by this research team had shown that heavy drinkers have increased electrical activity in the cortex region of the brain, which is responsible for decision-making. 

For the current study, the researchers monitored the brain activity of 11 men and 16 women under the age of 28 years old. The individuals had been consuming at least 25 units of alcohol per week over the course of a decade. One unit of alcohol is equivalent to a third of a pint of beer or half of a standard glass of wine.

The results of the study, which were reported to the <a href="https://www.ecnp.eu/">European College of Neuropsychopharmacology</a>, revealed that men have more of an electrical surge in a region of the brain linked to addiction. The experts also determined that “male brain electrical functioning is changed more than female brains by long-term alcohol use.”

“What this work means is that long-term alcohol use affects young men and women very differently, and we need to find out how these differences manifest themselves,” said Dr. Kaarre.

According to the <a href="https://www.cdc.gov/">Center for Disease Control</a> (CDC), men are more likely than women to drink excessively. The CDC also states that men consistently have higher rates of alcohol-related deaths and hospitalizations than women.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Men may have a harder time quitting drinking

A recent study from the University of Eastern Finland has...

Researchers at <a href="http://www.columbia.edu/">Columbia University</a> have studied the genomes of 210,000 people to examine genetic mutations which make people more susceptible to various health issues. The researchers were able to identify two harmful mutations that are appearing much less frequently, which suggests that humans are still evolving.

"It's a subtle signal, but we find genetic evidence that natural selection is happening in modern human populations," said study co-author Joseph Pickrell.

The study revealed that the genetic variants which predispose people to <a href="https://www.earth.com/news/eating-fish-prevent-alzheimer/">Alzheimer's</a> and heavy smoking are significantly less present in people with longer lifespans. Sets of genetic mutations that make people more vulnerable to heart disease, high cholesterol, obesity, and asthma also appeared less frequently in people who lived longer. 

People develop more beneficial traits when genetic mutations form that will aid in survival. As each generation passes on the favorable traits, these traits become more commonly distributed throughout the population. Although complex traits may take millions of years to emerge, the evolution itself is happening with each generation.

By comparing the genomes of hundreds of thousands of people, researchers are able to track the rise and fall of genetic mutations, which allows them to determine which traits are thriving and which are vanishing.

During the current study, two population-level mutation shifts stood out to the researchers. They noticed a drop in the frequency of the ApoE4 gene linked to Alzheimer's in women over 70, and there was a similar drop in the frequency of a mutation in the CHRNA3 gene associated with heavy smoking in men.

The researchers were surprised to find only two common mutations across the entire human genome that heavily influence survival. The fact that no more of such mutations were detected implies that natural selection has eradicated other variants from the population.

"The environment is constantly changing," said lead author Hakhamenesh Mostafavi. "A trait associated with a longer lifespan in one population today may no longer be helpful several generations from now or even in other modern day populations."

The study, published in <a href="http://journals.plos.org/plosbiology/">PLOS Biology</a>, may be the first to explore how the human genome is evolving in a time frame of only one or two generations. The researchers hope that future genome sequencing and testing will reveal more about the evolution of the human species.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Humans are still evolving, according to new study

Researchers at Columbia University have studied the genomes of 210,000...

An examination of the link between diet and age-related health issues has produced some surprising results. The study has revealed that a high fat diet not only increases longevity but also improves physical strength.

Researchers from the <a href="http://www.vetmed.ucdavis.edu/">UC Davis School of Veterinary Medicine</a> set out to examine the health outcomes of eating various types of foods. The team conducted tests on mice to analyze the effects of three different <a href="https://www.earth.com/news/species-survival-adapt-diets/">diets</a>, which ranged from a diet high in carbohydrates to a diet that consisted of 89-90 percent fat.

"The results surprised me a little," said senior author and nutritionist Jon Ramsey. "We expected some differences, but I was impressed by the magnitude we observed--a 13 percent increase in median life span for the mice on a high fat vs high carb diet. In humans, that would be seven to 10 years. But equally important, those mice retained quality of health in later life."

For the last 20 years, Ramsey has studied the mechanics that lead to aging, which is a large contributor to major diseases in both rodents and humans. Previous studies have shown that calorie restriction slows the aging process in many animals, but Ramsey wanted to see how a high fat diet could impact the aging process.

The mice were divided into three groups and given different diets for the study. The researchers kept the calorie count the same across all three diets out of concern that the high-fat diet, also known as a ketogenic diet, would increase weight and decrease lifespan.

"We designed the diet not to focus on weight loss, but to look at metabolism," said Ramsey. "What does that do to aging?"

The ketogenic diet significantly increased the average lifespan of the mice in the study. The high-fat diet also improved memory, strength, and coordination. Furthermore, the ketogenic diet prevented an increase in age-related markers of inflammation and tumors.

"In this case, many of the things we're looking at aren't much different from humans," explained Ramsey. "At a fundamental level, humans follow similar changes and experience a decrease in overall function of organs during aging. This study indicates that a ketogenic diet can have a major impact on life and health span without major weight loss or restriction of intake. It also opens a new avenue for possible dietary interventions that have an impact on aging."

The findings of the study are published this month in the journal <a href="http://www.cell.com/cell-metabolism/home">Cell Metabolism</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

A high-fat diet may lead to a longer life

An examination of the link between diet and age-related health...

There’s actually a scientific reason why so many older people retire to warm places like Florida and Arizona to avoid snowy winters and freezing temperatures. As humans, our ability to adapt to cold weather conditions weakens as we get older, and we become more sensitive to <a href="https://www.earth.com/news/cold-weather-heart-attack/">cold</a> as the years go on. 

Now, scientists from the <a href="https://healthcare.utah.edu/">University of Utah Health</a> may have discovered new therapies for cold sensitivity that could also even treat obesity. The researchers also found and traced the circulatory patterns of acylcarnitines, a waxy lipid, and discovered that the liver plays an important role in cold adaptation. 

The research was published online in the journal Cell Metabolism. 

The researchers, with senior author Claudio Villanueva, an assistant professor of Biochemistry at Utah Health, began their study by observing circulatory levels of acylcarnitines in mice. 

By tracking acylcarnitines in the blood stream, the research team found that lipid levels increased in younger mice as they were exposed to colder temperatures, but in older mice acylcarnitines levels stayed stagnant. 

The research team tracked the acylcarnitines as they made their way through the circulatory system and found that the lipids originated in the liver. 

As the lipids circulated, they were broken down and metabolized in small, energy-intensive tissues, like brown fat. 

Brown fat is found in both mice and humans, but mice have larger quantities of it. Brown fat is considered a “good fat” and is a key part of warding off cold sensitivity. 

Scientists gave older mice a single dose of L-carnitine, a nutritional supplement. The dosed up older mice were able to adapt better to colder temperatures, even withstanding temperatures that would normally trigger hypothermia. 

By dosing the mice with L-carnitine, the researchers were able to help “fuel” the brown fat and in turn, the older mice could adapt better to colder temperatures. 

This exciting research could not only help treat cold sensitivity but also combat obesity and find new ways to jumpstart healthy weight loss. 

“The idea is to increase fuel utilization to drive the energy demanding process of adapting to the cold. If we can find a way to tell the body to expend more energy than it is taking in, the calories lost can lead to weight loss,” said Villanueva. 

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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

New treatment could boost your tolerance to cold weather

There’s actually a scientific reason why so many older people...

Experts from <a href="https://www.tilburguniversity.edu/">Tilburg University</a> set out to test what they believe to be two of the most important skills needed to sustain a marriage, self-control and forgiveness. The study revealed that marriage helps to improve both the ability to forgive and the ability to show restraint.

For the study, the experts observed 199 newlywed <a href="https://www.earth.com/news/couples-together-share-microbes/">couples</a>. They measured each individual's level of forgiveness by asking them to rate how much they agreed about statements like, “When my partner wrongs me, my approach is just to forgive and forget.” The individuals were also asked to rate how much they agreed with statements pertaining to self control such as, “I am good at resisting temptation.”

The assessments, which were repeated over the course of four years, showed that the newlyweds’ levels of forgiveness and self-control significantly increased. The researchers noted that the development of these traits did not coincide, suggesting that the enhancement of the two skills is completely unrelated.

“Having a high level of self-control is a desirable attribute: It helps one to prosper in almost all domains in life, including close relationships,” said lead author Dr.Tila Pronk.
“Similarly, being forgiving toward one's spouse not only benefits the relationship but also contributes to individual health and well-being.”

With this in mind, Dr. Pronk said that it makes sense “for people to strive to improve their levels of self-control and forgiveness, especially when they recently committed to their relationship.”

The findings of this study, published in the <a href="http://journals.sagepub.com/home/spr">Journal of Social and Personal Relationships</a>, supports other theories that people change once they are married. Previous research revealed that people become more introverted and less open to new experiences after marriage. For example, an analysis of by <a href="https://www.jhsph.edu/">Johns Hopkins Bloomberg School of Public Health</a> showed that divorced women were more extroverted and open compared to married women.

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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

Marriage can boost forgiveness and self-restraint

Experts from Tilburg University set out to test what they...

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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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

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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"

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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

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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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