There's something both captivating and comforting about the rhythms and harmonies of a symphony orchestra, right? Well, did you know that something similar happens inside your brain while you're catching some sleep? It turns out, our brains have a maestro of their own - breathing. 



Just as a conductor harmonizes an orchestra to create a symphony, breathing synchronizes the rhythm of brain waves during sleep. This phenomenon takes place in the hippocampus - a region of the brain that is critical for memory.



<h2 class="wp-block-heading" id="h-breathing-rhythms-during-sleep">Breathing rhythms during sleep</h2>



This fascinating revelation comes from a recent study by <a href="https://www.nm.org" target="_blank" rel="noreferrer noopener">Northwestern Medicine</a>. It marks the first time scientists have linked breathing rhythms during sleep to the hippocampal brain waves known as&nbsp;slow waves, spindles, and ripples. 



Study senior author Christina Zelano is a professor of neurology at Northwestern University Feinberg School of Medicine.



“To strengthen memories, three special neural oscillations emerge and synchronize in the hippocampus during sleep, but they were thought to come and go at random times,” noted Professor Zelano. "We discovered that they are coordinated by breathing rhythms.”



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



The study shows that certain brain waves, called hippocampal oscillations, align with specific phases of the breathing cycle. These oscillations are critical for organizing and <a href="https://www.earth.com/news/breathing-coordinates-brain-waves-for-memory-storage-during-sleep/" target="_blank" rel="noreferrer noopener">strengthening memories</a>. 



Andrew Sheriff is a postdoctoral student in Zelano's lab and the corresponding author of the study.



This means that the rhythm of your breathing during sleep plays an active role in helping your brain store and recall information effectively. 



“Memory consolidation relies on the orchestration of brain waves during sleep, and we show that this process is closely timed by breathing,” explained Sheriff.



This research opens new doors for understanding the intricate relationship between breathing, brain activity, and memory.



<h2 class="wp-block-heading" id="h-breathing-sleep-and-memory-consolidation">Breathing, sleep, and memory consolidation </h2>



The connection between sleep and improved memory is not a new discovery. The ancient Roman scholar Quintillion stated: "The interval of a single night will greatly increase the strength of the memory."



This phenomenon, now recognized as memory consolidation, involves the precise coordination of brain waves in the hippocampus.



Sheriff shared a personal example to explain how memory consolidation works. While attending a conference in Reykjavik, Iceland, he had to find his way around an unfamiliar city. 



After sleeping, he realized his sense of direction and understanding of the city's layout had improved. This improvement happened because, during sleep, the brain replayed and reinforced the experiences and maps he had formed earlier. 



His hippocampus, which is responsible for spatial memory, used specific brain waves to process and solidify this information overnight.



“The hippocampus plays a major role in forming a map of a new area,” Sheriff said. “I would wake up and feel I had a better representation of the city around me. That was facilitated by the oscillations that occurred during my sleep, which we found are coordinated by breathing.”



<h2 class="wp-block-heading" id="h-implications-for-sleep-disorders">Implications for sleep disorders</h2>



The study’s findings carry significant implications for individuals suffering from sleep-disordered breathing, such as sleep apnea. Poor memory consolidation is one of the many cognitive challenges associated with such conditions.



“When you don’t get sleep, your brain suffers, your cognition suffers, you get foggy,” Sheriff noted. He emphasized the connection between disrupted breathing during sleep and serious conditions such as stroke, dementia, and neurodegenerative diseases like Alzheimer’s.



Interestingly, the unique rhythm of breathing during sleep may serve a specific purpose. “If you listen to someone breathing, you might be able to tell when they are asleep, because breathing is paced differently when you’re sleeping,” Sheriff said. 



“One reason for that may be that breathing is performing a careful task: coordinating brain waves that are related to memory.”



<h2 class="wp-block-heading" id="h-new-frontier-in-sleep-research">New frontier in sleep research</h2>



The research highlights the importance of addressing sleep disorders to maintain cognitive health and memory. Sheriff emphasized the need for individuals with disrupted breathing to seek treatment, as improved sleep could have far-reaching benefits for overall brain function.



This study was funded by the National Institute on Deafness and Other Communication Disorders and a Ruth L. Kirchstein Institutional National Research Award.



This remarkable research adds a new layer of understanding to the intricate processes that occur during sleep. By uncovering the role of breathing in synchronizing brain waves, Northwestern scientists have paved the way for new interventions aimed at improving memory and cognitive health.



The study is published in the journal Proceedings of the National Academy of Sciences.



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Breathing rhythms help strengthen memories during sleep

There's something both captivating and comforting about the rhythms and harmonies of a symphony orchestra, right? Well, did you know that something similar happens inside your brain while you're catching some sleep? It turns out, our brains have a maestro of their own - breathing. Just as a conductor harmonizes an orchestra to create a symphony, breathing synchronizes the rhythm of brain waves during sleep. This phenomenon takes place in the hippocampus - a region of the brain that is critical for memory. Breathing rhythms during sleep...

Even though humans and fruit flies have not shared common ancestry in about 800 million years, we still share similar <a href="https://www.earth.com/news/plants-biological-clocks-grow/">circadian clock</a> neurons that control our body's daily rhythms. A recent analysis of fruit flies may help experts understand more about sleep timing in humans.

Researchers at the <a href="https://umich.edu/">University of Michigan</a> found that circadian clock neurons in fruit flies are constantly tracking the external temperature using thermoreceptors. The experts discovered that even small fluctuations in temperature have physiological effects on the neurons that regulate sleep timing.


“Decades of work from recent Nobel Prize winners and many other labs have have actually worked out the details of how light is able to adjust the clock, but the details of how temperature was able to adjust the circadian clock were not well understood,” said study first author Swathi Yadlapalli.

“Going forward, we can ask questions of how these two stimuli are processed and integrated into the clock system, and how this has effects on our sleep behavior and other physiological processes.”

The circadian rhythm is a cycle that controls many physiological processes, guiding sleep and waking over the course of a day. 


Study principal investigator Orie Shafer explained that circadian clocks in mammals control the internal body temperature to drive sleep patterns. He said that, although we think of the human body temperature as a steady 98.6 degrees, our body temperature actually fluctuates throughout the day.

“The circadian system produces a daily rhythm in temperature which is an important cue for when it's time to go to sleep,” said Shafer.

The researchers developed an optical imaging and temperature control system to examine how fruit fly neurons respond to external temperature. They captured snapshots of neural activity in the circadian clock neurons while the flies were exposed to a hot or cold stimulus.

“It looks like clock neurons are able to get the temperature information from external thermoreceptors, and that information is being used to time sleep in the fly in a way that's fundamentally the same as it is in humans,” said Shafer.

 “As temperature drops, these neurons that promote sleep become excited, and that really entrains the sleep activity cycle to external temperature cycles. It's precisely what happens to sleep in mammals when internal temperature drops.”

The study is published in the journal <a href="https://www.nature.com/">Nature</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Temperature impacts circadian clocks that guide sleep

Even though humans and fruit flies have not shared common...

Researchers at Columbia University's <a href="https://www.mailman.columbia.edu/">Mailman School of Public Health</a> are reporting that the legalization of <a href="https://www.earth.com/news/marijuana-less-damaging-alcohol/">medical marijuana</a> in the United States has not led to more recreational use of the drug by teenagers.

“For now, there appears to be no basis for the argument that legalizing medical marijuana has increased teens' use of the drug,” said senior author Dr. Deborah Hasin. 

“However, we may find that the situation changes as commercialized markets for medical marijuana develop and expand, and as states legalize recreational marijuana use.”

The investigation was based on data from 11 separate studies dating back to 1991 and from four large-scale U.S. surveys including the National Survey on Drug Use and Health. The researchers examined recreational marijuana use among teenagers following new medical marijuana laws and found no significant changes.


California was the first state in the country to legalize marijuana use for medical purposes in 1996, and a total of 29 states have now approved medical marijuana. Critics of the legislation have argued that it will lead to a rise in recreational use of marijuana among adolescents.

Dr. Hasin pointed out that there is little research available on the effect that legalized medical marijuana may have among adults.


“Although we found no significant effect on adolescent marijuana use, existing evidence suggests that adult recreational use may increase after medical marijuana laws are passed.” said Dr. Hasin. 

“The $8 billion cannabis industry anticipates tripling by 2025. Obtaining a solid evidence base about harmful as well as beneficial effects of medical and recreational marijuana laws on adults is crucial given the intense economic pressures to expand cannabis markets.”

Dr. Hasin said that thorough research is also needed to determine the intensity of marijuana use in teens.

“This warrants additional consideration, especially with the decreasing national trend of risk perception among adolescents and as the current perception gives rise to more medical marijuana stores and commercial opportunities.”

The study is published online in the journal <a href="https://www.psychologytoday.com/basics/addiction">Addiction</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Legalized medical marijuana has not increased use in teens

Researchers at Columbia University's Mailman School of Public Health are...

After a traumatic or difficult life event such as the loss of a loved one, it can be difficult to cope and process everything.

Many people have a hard time finding meaning or even a sense of self, but a new study has revealed how these kind of life-changing events can provide crucial learning opportunities. 

Researchers from <a href="http://oregonstate.edu/">Oregon State University</a> found that most people gained wisdom and new insight from a difficult time. The research was published in the Journals of Gerontology: Series B. 

“The adage used to be 'with age comes wisdom,' but that's not really true,” said Carolyn Aldwin, an author of the study and an expert on psychosocial factors that influence aging. “Generally, the people who had to work to sort things out after a difficult life event are the ones who arrived at new meaning.”

The researchers wanted to examine the effects that adversity and trauma had on the development of wisdom. Their work could help with future studies that delve into healthy <a href="https://www.earth.com/news/positive-attitude-dementia-risk/">aging</a> and how to incorporate better coping and management techniques. 

For the study, 50 adults ages 56 to 91 were interviewed. During the interviews, participants were asked to discuss a difficult life event, how they cope, and if their outlook was changed after. 

Aldwin noted that people often define themselves based on their past traumas and so for the interviews, the participants were immediately able to identify a difficult or challenging time. 

After analyzing the interviews, the researchers found that 13 of the participants were not affected by the event as far questioning their purpose or meaning. 

A large majority of the participants, however, reported that the event was so disrupting that it presented an opportunity to reflect and assess their beliefs and understanding of the world around them, ultimately gaining new wisdom and insight. 

The results also showed that social interactions such as receiving unsolicited emotional support played an important role in how people coped and managed after the event in questions and also added wisdom. 

“It mattered whether a participant was expected to adjust to the event quickly and 'get back to life,' or whether they were encouraged to grow and change as a result of the event,” said Heidi Igarashi, the study’s lead author. “The quality of the social interactions really make a difference.”

The results show how important social support is during a difficult event and that the kind of support we receive helps shape the way we look for new understanding and meaning.

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Difficult life events can provide new insight and wisdom

After a traumatic or difficult life event such as the...

Homo erectus may have had a more refined language than was previously believed, according to a controversial new theory.

Until now, it had always been thought that <a href="https://www.earth.com/news/humans-learn-language/">language</a> first developed with Homo sapiens. This is because analysis of Homo erectus shows that species lacked the hyoid bone, which is an anchoring structure for the tongue and a key player in speech. 

Unlike Homo sapien, the lack of hyoid bone would have only enabled Homo erectus to make primitive sounds such as grunting or howling. 

However, Daniel Everett, a professor at <a href="https://www.bentley.edu/">Bentley University</a>, boldly claims that this is not the case. He argues that if Homo Erectus lacked language, boat travel would have been impossible. 

“What is the greatest technology we have ever had as a species, the answer is language. Who invented it? Homo Erectus, about one million years ago or more,” Everett said at the American Association for the Advancement of Science meeting in Austin. “Those are controversial claims. Everybody talks about Homo Erectus as a stupid ape-like creature, which of course describes us just as well, and yet what I want to emphasize is that Erectus was the smartest creature that had ever walked the Earth.” 

Everett suggests that Homo erectus traveled by boat and landed on different islands and shores across the oceans.

Building and navigating these boats would not have been possible given the currents and the conditions of sea travel without some language with symbols. 

“They needed to be able to paddle. And if they paddled they needed to be able to say ‘paddle there’ or ‘don't paddle,’” said Everett. “You need communication with symbols not just grunts. They accomplished too much for this to simply be the sort of communication that we see in other species without symbols.” 

Everett’s claims are controversial, and the scientific community does not completely agree that Homo erectus was a cabal sea-farer or that they had a more evolved language. 

“Tsunamis could have moved early humans on rafts of vegetation.,” Chris Stringer, Head of Human Origins at the Natural History Museum in London told <a href="https://www.theguardian.com/science/2018/feb/20/homo-erectus-may-have-been-a-sailor-and-able-to-speak">The Guardian. </a>

But if Everett’s theories are correct, it reconstructs our understanding of early man and how language truly first developed. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com</a> Staff Writer

When did humans first begin using words?

Homo erectus may have had a more refined language than...

If you call yourself a perfectionist, it’s likely you are constantly striving to be the best at everything and avoid making mistakes at all costs. 

While this tenacity may help you become and stay successful, it can often be an exhausting and difficult way to live. Perfectionists can be overly self-critical and get down on themselves for making minor mistakes. When a perfectionist fails, they can often experience depression and burnout.

In a recent study published in the open-access journal <a href="http://journals.plos.org/plosone/">PLOS ONE</a>, researchers from <a href="http://www.acu.edu.au/">Australian Catholic University</a> found that relating to oneself in a healthy way can help disrupt the link between perfectionism and depression. In the study, led by Madeleine Ferrari, the researchers assessed whether self-compassion – a way to positively relate to oneself – might help weaken the association between <a href="https://www.earth.com/news/screen-time-suicide-teens/">depression</a> and perfectionist tendencies.

The study involved 541 adolescents and 515 adults answering questions in an anonymous survey that assessed perfectionism, depression, and self-compassion. Detailed analysis of these questionnaires determined that self-compassion might help perfectionists avoid falling into the trap of depression when they experience failure. This finding was consistent across both groups of differently-aged people, suggesting that self-compassion could help moderate the link between perfectionism and depression across a wide range of ages. 

“Self-compassion, the practice of self-kindness, consistently reduces the strength of the relationship between maladaptive perfectionism and depression for both adolescents and adults,” says Ferrari. The authors believe that self-compassion interventions may help moderate the negative effects of perfectionism, but further research is needed to determine if this is the case.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Self-compassion found to be crucial in combating perfectionism

If you call yourself a perfectionist, it’s likely you are...

<a href="https://www.earth.com/news/people-knowledge-evolution/">Evolution</a> is a constant, albeit slow process, and there is no finish line when it comes to how evolved a species can be. 

According to a new study, humans may now be evolving a gene that protects against alcoholism and malaria.

Researchers from the <a href="https://www.upenn.edu/">University of Pennsylvania</a> identified positive gene variants across populations to show how some regions are evolving certain traits. 

Their findings were published in the journal Nature Ecology and Evolution. 

The study focused on sweeping genetic events across different populations in order to find gene variants that overlapped. The variants were either a specific response to a region’s geographic location or shared evolutionary background. 

The researchers collected and analyzed data from 2,500 people from the 1,000 Genomes Project. The Genomes Project is the largest public catalog of human variation and ran from 2008 to 2015.

Emerging gene variants were examined in relation to their different populations, and there were five genomic hotspots that the researcher identified. 

One of the variants could potentially prevent alcoholism in the future, and this variant was seen in areas where alcoholism is particularly problematic. 

Benjamin Voight, a co-author of the study, told the <a href="http://www.dailymail.co.uk/sciencetech/article-5412653/Humans-evolving-gene-stop-drinking-alcohol.html">Daily Mail</a> that these gene variants may occur in areas “where people who drank heavily would die, whereas those who didn't drink much alcohol survived and passed on their genes to their children.”

The researchers discovered variants of the ADH gene which helps break down alcohol in both Africa and Asia. This variant works by making alcohol intolerable thereby avoiding potential addiction. 

Other variants could aid in building resistance to malaria in Asia and Africa and help with heart health in Europe. 

The research is noteworthy because it identifies gene variants in different populations and shows how evolution has exceeded the bounds of common ancestry with gene variant events, overlapping in some areas and not others.

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Could humans be evolving a gene to protect against alcoholism

Evolution is a constant, albeit slow process, and there is...

A study from <a href="https://www.rutgers.edu/">Rutgers University</a> has shown that the presence of <a href="https://www.earth.com/news/autonomous-vehicles-environmental-benefits/">autonomous vehicles</a> can improve traffic flow and lower fuel consumption in heavy traffic, even when only a few of the vehicles are on the road. 

A multidisciplinary team of experts in the fields of traffic flow theory, control theory, robotics, cyber-physical systems, and transportation engineering presented their research in an exhibit at the Washington Auto Show. 

The study, which was funded by the National Science Foundation (NSF), demonstrates how autonomous vehicles can help to prevent and clear up traffic jams.

Humans naturally oscillate while driving and this often disrupts the smooth flow of traffic. When a driver changes lanes or merges, this can create stop-and-go traffic.

During field experiments, the researchers controlled the pace of the autonomous vehicle. The self-driven car helped to manage the traffic flow by eliminating the stop-and-go waves. As a result, the traffic was not fluctuating as it does when the vehicles are all driven by humans.

The experts discovered that a percentage of autonomous vehicles as small as 5 percent could have a significant influence on traffic. In addition, the smoother flow of traffic generated by the self-driven cars was found to reduce overall fuel consumption by up to 40 percent and braking events by up to 99 percent.

“Most of the policymakers, car manufacturers, car dealers, and others we talked with were very impressed with the research results and got a positive feeling about autonomous vehicles,” said lead author Benedetto Piccoli. “They all agreed that the impact on real traffic economy and environmental impact could be of great importance.”

The NSF invited the team to discuss their work with auto industry leaders and lawmakers in Washington, D.C. 

“The experience was great since we had to interact with a new audience,” said Piccoli.

The research was presented at the auto show as part of the NSF-funded Cyber-Physical Systems research project on Control of Vehicular Traffic Flow via Low Density Autonomous Vehicles.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Autonomous vehicles can help reduce traffic jams and fuel costs

A study from Rutgers University has shown that the presence...

In an unprecedented study, researchers at <a href="http://www.ncl.ac.uk/">Newcastle University</a> have projected changes in heat waves, droughts, and flooding for every European city using all available climate models.

The experts are reporting that heat waves will become worse in all 571 cities and drought conditions will increase as well, particularly in southern Europe.

River flooding will become more frequent and severe, with the worst projections in northwestern European cities. In the best case scenario, 85 percent of cities in the <a href="https://www.earth.com/news/brexit-threat-womens-rights/">UK</a> with a river will still face increased flooding.

The team developed three possible future cases which they referred to as the low, medium, and high impact scenarios. Even for the lowest impact scenario, the number of heat wave days and maximum temperatures will rise for every city in Europe.

The high impact scenario predicts that 98 percent of European cities will experience more intense droughts in the future, and cities in southern Europe may face droughts that are 14 times worse than today.

“Although southern European regions are adapted to cope with droughts, this level of change could be beyond breaking point,” said lead author Dr. Selma Guerreiro.

“Furthermore, most cities have considerable changes in more than one hazard which highlights the substantial challenge cities face in managing climate risks.”

Study co-author Professor Richard Dawson says that the study has far-reaching suggestions in terms of how Europe adapts to climate change.

“The research highlights the urgent need to design and adapt our cities to cope with these future conditions,” said Professor Dawson.

“We are already seeing at first hand the implications of extreme weather events in our capital cities. In Paris the Seine rose more than 4 metres above its normal water level. And as Cape Town prepares for its taps to run dry, this analysis highlights that such climate events are feasible in European cities too.”

The Intergovernmental Panel on Climate Change (IPCC) will hold its first Cities and Climate Change Science Conference next month to emphasize the major roles that cities must play in climate change mitigation.

“A key objective for this conference is to bring together and catalyze action from researchers, policy makers and industry to address the urgent issue of preparing our cities, their population, buildings and infrastructure for climate change.”

The research is published in the journal <a href="http://iopscience.iop.org/erl">Environmental Research Letters</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Climate models show future extreme weather for European cities

In an unprecedented study, researchers at Newcastle University have projected...

Research from the <a href="https://www.nd.edu/">University of Notre Dame</a> has revealed that hitting rock bottom can be a good thing, particularly after losing a job. The experts found that bottoming out can be a catalyst for personal transformation, and may lead to a new work identity.

“On the way down, we frantically do all sorts of things to try and repair the situation, and suffer as they fail,” said lead author Dean Shepherd. 

“Bottoming out frees us from the misconception that the problems can be fixed, and in the process, frees us from other constraints and negative emotions and provides the conditions necessary to find a viable solution.”


When an individual hits rock bottom, they eventually become aware that their <a href="https://www.earth.com/news/teen-gender-identity-cultural/">identity</a> has been lost. This realization leads to one of two paths - a path toward recovery or a path toward dysfunction.

A fairly recent concept has been introduced in the context of organizational change management called “identity play,” which is defined as “people’s engagement in provisional but active trial of possible future selves.”

“Using ‘identity play’ provides a safe environment to escape the situation and try new things, discarding bad ideas or finding and refining a new identity and returning stronger than before,” said Shepard.

This activity allows a person to creatively explore new work identities and try them out without having to make a commitment. If not for hitting rock bottom, the individual would have remained stuck in the past without the freedom to consider different alternatives for the future.


“A failed corporate executive might consider a variety of other potential roles,” said Shepherd. “For example, sitting on the board of a nonprofit organization that is desperate for experienced managerial guidance, exploring government positions or running for office, working with startups, and so forth.”

“Similarly, a failed entrepreneur might explore how skills learned in starting a business could be applied in a corporate setting, take standardized exams to be considered for law school or engage in other low risk exploration activities. In these cases, hitting rock bottom opens up myriad new opportunities.”

Individuals who choose the less desirable path use fantasy as a means of escape and often turn to drug and alcohol use. Studies have shown that people who are fixated on the loss of a former identity often become self-destructive.

Shepard explained that on this path, “people will oscillate between no emotion and severe negative emotion and make no progress toward building a new identity, which can eventually lead to even worse outcomes like suicide.”

Shepherd hopes that this research will help people realize that hitting rock bottom can be an opportunity to let go and begin a new life, and may prevent them from trying to escape reality.

“Hitting Rock Bottom After Job Loss: Bouncing Back to Create a New Positive Work Identity,” was published this month in <a href="http://aom.org/Publications/AMR/Academy-of-Management-Review.aspx">Academy of Management Review</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Hitting rock bottom can present fresh opportunities, study finds

Research from the University of Notre Dame has revealed that...

You may have heard the saying “normal is just a setting on a washing machine” as a justification for behavior that might be considered out of the ordinary or even weird. 

Now, new research shows that this adage might hold more merit as some variability in our brain’s thoughts and behaviors, even those that don’t line up with idealized notions of mental health, showcase our adaptability and could even be considered healthy. 

A study conducted by researchers from<a href="https://www.yale.edu/"> Yale University </a>reviewed widely challenged traditional psychological methods of categorizing and diagnosing disorders. 

Their findings, published in the journal Trends in Cognitive Sciences, focus on a new “dimensional perspective” of mental health disorders that account for variability across a wide spectrum. 

“I would argue that there is no fixed normal,” said Avram Holmes, the senior author of the study. “There's a level of variability in every one of our behaviors. Any behavior is neither solely negative or solely positive. There are potential benefits for both, depending on the context you're placed in.”

Variability is a fundamental cornerstone of natural selection and evolution, and the researchers argue that this must be taken into consideration when working towards a diagnosis. 

Some behaviors that may be out of sync with what we might consider normal could be an adaptive measure. 

Holmes uses an example of impulsive, risk-taking behavior to show how any behavior may be beneficial depending on the environment. Thrill seekers and risk takers are usually associated with an increased likelihood of <a href="https://www.earth.com/news/men-harder-quitting-drinking/">substance abuse</a> or physical injury. 

“But if you flip it on its head and look at potential positive outcomes, those same individuals may also thrive in complex and bustling environments where it's appropriate for them to take risks and seek thrills,” said Holmes. 

The problem is that if you factor in variability, it complicates methods for diagnosing mental disorders.

This is why more and more effort is being made to restructure the way health experts identify biomarkers for psychological illness. 

“What we want to try to do is build multivariate approaches that consider multiple domains of human behavior simultaneously, to see if we can boost our power in predicting eventual outcomes for folks,” said Holmes. 

Collaborations are already underway with different institutions in order to achieve this goal, and Holmes notes that accounting for some variability is important in many aspects of our lives, not just mental health. 

“This is a broader issue with our society, but we're all striving towards some artificial, archetypal ideal, whether it's physical appearance or youthfulness or intelligence or personality,” said Holmes. “But we need to recognize the importance of variability, both in ourselves and in the people around us. Because it does serve an adaptive purpose in our lives."

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette,</a> <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Good news for weirdos: There is no normal brain

You may have heard the saying “normal is just a...

This past year has been a contentious one <a href="https://www.earth.com/news/religion-trumps-politics-when-it-comes-to-the-environment/">politically</a> for citizens of the United States, and has affected citizens of other nations around the world. It seems like America’s two biggest political parties – Democrats and Republicans – are further apart ideologically than they have been in quite some time. New neuroeconomics research published in the journal <a href="http://www.cell.com/trends/cognitive-sciences/home">Trends in Cognitive Sciences</a> seeks to shed light on how these differences are influenced in the believe systems of party members, and what some potential solutions may be to bring us all closer together.

Jay Van Bavel, a psychologist at <a href="https://www.nyu.edu/">New York University</a> and senior author of the paper, believes that the issue lies with valuing our identity more than our accuracy. This mindset allows us to accept “fake news” that aligns with our political party’s beliefs, and may explain why high-quality news sources are no longer trusted by a large portion of the public.

“Neuroeconomics has started to converge on this understanding of how we calculate value. We’re choosing what matters to us and how to engage with the world, whether that’s which newspaper we pick up in the morning or what we have for breakfast,” explains Van Bavel. “And so we started to think, it’s when our goals to fit in with certain groups are stronger than the goal we have to be accurate that we are more likely to be led astray.”

Van Bavel calls this his identity-base model of belief. Essentially, we assign values to different ideas based on what matters to us most, and then compare those values to decide on what idea we believe to be true. Furthermore, the sense of belonging and self-defining labels that political parties provide can provide us with that much-needed sense of belonging. This all has the potential to matter more to us than accuracy about an issue, which leads us to align more with our party’s views, even if they may be incorrect.

As a consequence, the sources of the information we receive actually have less of an impact. “Having a really high-quality news source doesn’t matter that much if we think the people producing it belong to a different group than us,” says Van Bavel.

The solution for these issues is to try to increase the value of accurate beliefs while also reducing the effects of identity. One of the more simple solutions for increasing the value of truth is to ask people to put money on the line. “When you are in a disagreement, ask your opponent, ‘You wanna bet?’ And then their accuracy motives are increased, and you can see right away whether they were engaging in motivated reasoning. Suddenly $20 is on the line, and they don’t want to be proven wrong,” says Van Bavel.

To reduce the effects of identity, one solution would be to get people to think of themselves as citizens of a nation or the world, rather than as members of a political party. However, we must also be careful about how we engage with people who align with a different political party. “It turns out that if you insult them and publicly criticize them, their identity needs increase, and they become threatened and less concerned about accuracy. You actually need to affirm their identity before you present information that might be contradictory to what they believe,” Van Bavel explains.

Van Bavel is also working on empirical studies that will reaffirm the generalization of these findings to our beliefs. Overall, it’s clear that the political divide in the United States is a complex and delicate issue. While belonging to a political party may help us feel validated and part of a team, it’s much better to think of ourselves as citizens of our country first, and members of a political party second.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Our affiliation to political parties makes fake news believable

This past year has been a contentious one politically for...

Jellyfish are considered a delicacy in Asian cuisine and have been a staple for centuries. 

Unlike other marine species, <a href="https://www.earth.com/news/sea-nettle-jellyfish-species/">jellyfish</a> have been thriving despite the effects of climate change, and because of their rich nutrients, are being considered as a possible viable food source for the global population. 

Though they are certainly less common and even considered an oddity in western cuisine, many people might be surprised to find that jellyfish have a crunchy, crispy texture despite their notoriously slimy exterior.

This is because the bell of the fish is cured in a solution of sodium chloride and alum for a month, which turns the soft, gelatinous body into something more akin to a pickled cucumber. 

Danish researcher Mathias Clausen from the<a href="https://www.sdu.dk/en/"> University of Southern Denmark </a>was curious about the molecular processes that created the crunchy texture when the original texture is so different. 

“Tasting jellyfish myself, I wanted to understand the transformation from a soft gel to this crunchy thing you eat,” Clausen said.

In a new study, he and his colleagues created a jellyfish “chip” of their own in order to gain a better understanding of how food preparation altered the jellyfish starting at a molecular level. 

Their work could spur a whole new field of science and gastronomy that revolves around the biophysics and chemistry behind food preparation. 

The research team first devised a method using ethanol that created a similar crunchy texture of jellyfish soaked in the briny mixture of sodium chloride and alum, but it only took a few days. 

"Using ethanol, we have created jellyfish chips that have a crispy texture and could be of potential gastronomic interest," Clausen said.

The researchers examined how the long fibrous filaments in the bell were altered during the ethanol process in an attempt to discover how the new textures were created. 

“Little is known about the molecular anatomy of the jellyfish,” Clausen said. “We are still not completely sure which structures we are visualizing.” 

Clausen and his colleagues are excited about the promising implication their study could have on gastronomy and the biophysics of food. The research team also hopes to continue their jellyfish studies to see if there are different ways the bell can be consumed and how it would taste and feel.

“As this is pioneering work, I think using tools available to us to tackle the science of good eating can open peoples' eyes for a completely new scientific field,” Clausen said

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com </a>Staff Writer

Image Credit: Mie T. Pedersen

Could jellyfish chips be a crunchy new snack?

Jellyfish are considered a delicacy in Asian cuisine and have...

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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

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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"

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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

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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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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes why satellite images and measurements of our planet have become "essential to our survival, offering a new outlook of our world."&nbsp;



Rising sea levels pose one of the biggest societal threats associated with climate change. According to ESA, satellite altimeter missions such as Copernicus Sentinel-6 are essential in monitoring global and regional changes in sea level.



"Unbeknown to many, the island of Crete, Greece, plays an important role in the Copernicus satellite altimetry constellation and on an international stage," reports ESA.



"Satellite altimetry data have to be continuously monitored at the ESA’s Permanent Facility for Altimetry Calibration where different techniques have pioneered the use of transponders to provide the best measurements to validate satellite altimeters in space soon after launch."



Dr. Craig Donlon explains that, by understanding planet Earth through satellite measurements, we are able to find evidence of change.&nbsp;



Video Credit: European Space Agency&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

Satellites have become essential to our survival

[sendtonews key="761m2QQvR1-2035772-12187" type="single"] Today’s Video of the Day from the...