A good night’s sleep does more than help you feel rested - it literally clears your mind. New research reveals how deep sleep removes waste buildup in the brain, a process that is crucial for brain health.



However, sleep aids may disrupt this natural “brainwashing” system, raising questions about their long-term effects on cognitive function.



<h2 class="wp-block-heading" id="h-brain-s-built-in-cleanup-system">Brain’s built-in cleanup system</h2>



The glymphatic system is like a <a href="https://www.earth.com/news/how-sleep-transforms-brain-performance/" target="_blank" rel="noreferrer noopener">cleaning service for your brain</a>. Throughout the day, metabolic waste builds up in the brain, including toxic proteins that, if not removed, can lead to neurological issues like Alzheimer’s disease.



The glymphatic system works by using cerebrospinal fluid (CSF), a clear liquid that surrounds the brain and spinal cord, to flush out these harmful substances.



Think of the CSF as water flowing through pipes and washing away debris. This process happens most effectively during deep sleep, when the brain’s cleaning system kicks into high gear.



While scientists have known about the glymphatic system’s existence for years, they didn’t understand exactly what powered it - until now.



Recent research has shown that norepinephrine, a chemical messenger in the brain, is key. During deep sleep, waves of norepinephrine cause blood vessels in the <a href="https://www.earth.com/news/your-brain-literally-changes-based-on-daily-activities-and-lifestyle/" target="_blank" rel="noreferrer noopener">brain</a> to pulse rhythmically. 



<h2 class="wp-block-heading" id="h-role-of-norepinephrine-in-brain-cleaning">Role of norepinephrine in brain cleaning</h2>



Danish scientists have uncovered a crucial role for norepinephrine during deep sleep. They found that the brainstem releases waves of norepinephrine roughly every 50 seconds during this sleep phase. 



These waves cause blood vessels in the brain to contract and relax rhythmically, much like a pump. This rhythmic movement generates fluid pulses that help cerebrospinal fluid flow through the brain and flush out waste and toxins.



“It’s like turning on the dishwasher before you go to bed and waking up with a clean brain,” explained Maiken Nedergaard, senior author and researcher at the <a href="https://www.rochester.edu" target="_blank" rel="noreferrer noopener">University of Rochester</a> and <a href="https://www.ku.dk/en" target="_blank" rel="noreferrer noopener">University of Copenhagen</a>.



<h2 class="wp-block-heading" id="h-brain-blood-flow-during-sleep">Brain blood flow during sleep</h2>



Nedergaard's team investigated how norepinephrine affects blood flow during sleep. In sleeping mice, they observed that waves of norepinephrine align with changes in the size of blood vessels.



These waves cause the blood vessels to alternately contract and expand in a steady rhythm. This rhythmic motion acts like a pump, pushing cerebrospinal fluid through the <a href="https://www.earth.com/news/deep-sleep-how-slow-waves-boost-memory-formation/" target="_blank" rel="noreferrer noopener">brain</a> to remove waste.



“You can view norepinephrine as this conductor of an orchestra. There’s a harmony in the constriction and dilation of the arteries, which then drives the cerebrospinal fluid through the brain to remove the waste products,” noted lead author Natalie Hauglund.



<h2 class="wp-block-heading" id="h-are-all-types-of-sleep-equal">Are all types of sleep equal?</h2>



The researchers investigated how zolpidem, a common sleep aid, affects the brain's cleaning system during deep sleep. They found that mice given zolpidem experienced a significant reduction in norepinephrine waves, which are essential for driving the brain’s waste-clearing process. 



Specifically, the norepinephrine waves were 50% weaker in mice that were given zolpidem than in mice that slept naturally.



As a result, the fluid transport system responsible for flushing out brain waste slowed down by more than 30 percent. Although zolpidem helped the mice fall asleep faster, their brain’s ability to remove harmful waste was compromised.



This suggests that while sleep aids like zolpidem can promote sleep, they might interfere with the brain's natural cleaning processes, potentially <a href="https://www.earth.com/news/poor-sleep-habits-may-age-the-brain-faster/" target="_blank" rel="noreferrer noopener">affecting long-term brain health</a>.



“If people aren’t getting the full benefits of sleep, they should be aware of that so they can make informed decisions,” Hauglund warned.



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



While this study was focused on mice, the researchers believe the findings are relevant to humans, who also have a glymphatic system.



Similar patterns of norepinephrine waves, blood flow changes, and fluid dynamics have been observed in human brains. Disruptions to these processes may contribute to neurological conditions like Alzheimer’s disease.



“Now we know norepinephrine is driving the cleaning of the brain, we may figure out how to get people a long and restorative sleep,” Nedergaard concluded.



<h2 class="wp-block-heading" id="h-keeping-the-brain-healthy-with-sleep">Keeping the brain healthy with sleep</h2>



The research highlights how critical deep sleep is for keeping the brain healthy. During deep sleep, the brain’s cleaning system removes harmful waste and toxins. This process is essential for preventing neurological disorders and <a href="https://www.earth.com/news/sleep-is-essential-for-memory-formation/" target="_blank" rel="noreferrer noopener">maintaining cognitive function</a>.



While sleep aids can make falling asleep easier, they may interfere with the brain's natural cleaning process by disrupting mechanisms like norepinephrine waves, which drive waste clearance. 



This disruption could reduce the benefits of sleep and potentially harm long-term brain health.



By understanding these processes, people can make more informed decisions about their sleep habits, such as prioritizing natural, restorative sleep over relying on sleep medications.



The study is published in the journal <a href="https://www.cell.com/cell/abstract/S0092-8674(24)01343-6" target="_blank" rel="noreferrer noopener">Cell</a>.



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Deep sleep clears toxic waste from the brain

A good night’s sleep does more than help you feel rested - it literally clears your mind. New research reveals how deep sleep removes waste buildup in the brain, a process that is crucial for brain health. However, sleep aids may disrupt this natural “brainwashing” system, raising questions about their long-term effects on cognitive function. Brain’s built-in cleanup system The glymphatic system is like a cleaning service for your brain. Throughout the day, metabolic waste builds up in the brain, including toxic proteins that, if not removed,...

The Trump administration's Environmental Protection Agency (EPA) has announced the guidelines of its proposed <a href="https://www.epa.gov/newsreleases/epa-proposes-affordable-clean-energy-ace-rule">Affordable Clean Energy (ACE) Rule</a> today. The legislation would replace former president Obama's Clean Power Plan (CPP), which set ambitious targets to close outdated coal-burning plants and cut back on carbon dioxide emissions. 

Instead of shutting down aging power plants, the ACE rule would <a href="https://www.earth.com/news/trump-coal-emissions/">allow states</a> to lower their pollution standards and keep these plants operational by making minor improvements. In addition, the plan would give individual states the authority to regulate harmful greenhouse gas emissions.

A news release from the EPA states: “Many believed the CPP exceeded EPA’s authority under the Clean Air Act, which is why 27 states, 24 trade associations, 37 rural electric co-ops, and three labor unions challenged the rule.”

After reviewing the CPP, the EPA made some major changes to allow states “adequate time and flexibility” to develop their own strategies for improving the efficiency at existing power plants and moving toward emissions reductions.

The EPA defends its decision to replace the “overly prescriptive and burdensome Clean Power Plan (CPP)” by insisting that the legislation overstepped its authority. The EPA claims that the ACE rule “instead empowers states, promotes energy independence, and facilitates economic growth and job creation.”

But, as the details of the proposed ACE rule emerge, not everyone is singing its praises. According to <a href="https://www.nytimes.com/">The New York Times</a>, the EPA itself acknowledges in the fine print of its proposal that the devised plan would lead to higher carbon dioxide emissions and could cause up to 1,400 premature deaths every year.

California governor Jerry Brown posted on Twitter: “This is a declaration of war against America and all of humanity - it will not stand. Truth and common sense will triumph over Trump’s insanity.”

The <a href="http://www.lung.org/">American Lung Association</a> released the following statement in response to the ACE rule:

"With today's proposal, President Trump and Acting EPA Administrator Wheeler abandon much-needed public health safeguards against power plant pollution, placing the health of all Americans at risk, and especially those who are most vulnerable, including children, older adults, and people with asthma and heart disease.”

“Today's proposal is a dangerous substitute for the Clean Power Plan and a careless giveaway to polluters that will delay meaningful progress in the future. The United States must aggressively limit power plant carbon pollution to protect human health from the impacts of climate change, including degraded air quality and more extreme weather threats, such as hurricanes, wildfires and floods.”

The EPA will accept comments for 60 days after the proposal is published in the Federal Register, and a public hearing will also be held. More information, including a fact sheet, is available at <a href="https://www.epa.gov/stationary-sources-air-pollution/proposal-affordable-clean-energy-ace-rule">https://www.epa.gov/stationary-sources-air-pollution/proposal-affordable-clean-energy-ace-rule</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="http://www.earth.com/staff/">Earth.com</a> Staff Writer

Paid for by <a href="http://earth.com">Earth.com</a>

Trump admin’s new coal rules will lead to poorer U.S. air quality

The Trump administration's Environmental Protection Agency (EPA) has announced the...

A new study led by the <a href="https://www.uchicago.edu/">University of Chicago</a> has found that people are more likely to tell the truth when they are speaking in a foreign language.


The research was focused on native speakers of English, Spanish, Hebrew, and Korean as they participated in an economic game. The participants were randomly assigned to play the game in their native language or in a <a href="https://www.earth.com/news/different-language-make-decisions/">foreign language</a>, and were paid according to self-reported numbers that appeared on dice.

The game was designed so that the outcome was private, which means that participants could cheat to gain a larger profit without any risk of consequences.

The study revealed that individuals who were speaking in a foreign language were less likely to cheat compared to people who were speaking their native language.

Study co-author Yoella Bereby-Meyer is a professor of Psychology at <a href="http://in.bgu.ac.il/en/Pages/default.aspx">Ben-Gurion University of the Negev</a> in Israel.

“When individuals have a chance to profit from dishonesty with no risk of being caught, their instinctive tendency is to cheat, while they refrain from cheating when they have time to deliberate,” said Professor Bereby-Meyer. 

She explained that there is a “natural temptation to lie” when it involves money, such as lying about a child's age to get a cheaper ticket price.

*Even though there wasn’t much language involved, just being in a foreign language mindset made them more likely to resist temptation,” said graduate student Sayuri Hayakawa.

The fact that the participants were more inclined to inflate their numbers when speaking in their native language was evident in the higher proportion of 5s and 6s reported by this group.


The findings of this study contradict a common misconception that people have about foreigners. Co-author Boaz Keysar is a professor of Psychology at UChicago.

“Studies have shown people with accents are perceived as less credible because they can be more difficult to understand.” The results of this research, however, suggest otherwise.

The study is published in the journal <a href="http://www.cognitivesciencesociety.org/cognitive-science-journal/">Cognitive Science</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

People tend to be more honest when speaking a foreign language

A new study led by the University of Chicago has...

Belief in evolution – or lack there of – has been a major dividing factor amongst populations for centuries. As science education has increased across the globe over time, it seems like it is having a negating effect on the prevalence of evolution denial. A landmark new study published in <a href="https://www.springer.com/life+sciences/evolutionary+%26+developmental+biology/journal/12052">Evolution: Education and Outreach</a> has found that university students in Australia are much more likely to believe in the science of human evolution over creationism or divine guidance than the previous generation.

The study consists of an overview of the last 32 years of annually-assessed student opinions. In 1986, the majority of students held the belief that god is the ultimate or contributing cause of human origins – but this is no longer the case. Belief that humans evolved without divine involvement has now become the dominant view amongst students. 

Starting in 1986, researchers took a yearly poll of first-year biology students at <a href="https://www.unsw.edu.au/">UNSW Sydney</a>, asking them about their views on evolution and creationism. In the first year of the study, 60 percent of students believed god had a role in the origin of humans. When researchers asked students in 2017 the same question, only 29 percent held this view.

“Given that the creationist view (that humans were created by God within the last 10,000 years, rather than evolved naturally over millions of years without the involvement of God) is common among American students, we wanted to know how much of a challenge introducing the evidence for evolution to first-year students would be for us in Australia,” says Michael Archer, a professor at UNSW Sydney and lead author of the study. “We also wanted to know if Australian student views about this key issue were changing over time.”

Studies depicting long-term trends in views about the origins of humans are seldom performed, and when they are, they are generally limited to surveys of adult populations in the U.S. Given what studies have been done regarding creationism and the American population, the results of this study from Australia show a significant contrast to the corresponding beliefs among Australian students and the American public. 

“In the USA, belief in creationism, while slowly declining, appears to have remained in the 40% range, four times that seen in our Australian survey,” Archer says.

For universities in <a href="https://www.earth.com/news/dengue-fever-modified-mosquitoes/">Australia</a>, this steep decline in the belief of creationism amongst students suggests that professors won’t need to spend much time on convincing students of the scientific evidence for human evolution. However, the researchers do advocate for continued assessment of these beliefs through running similar annual surveys in high schools across Australia.

[caption id="attachment_1217639" align="aligncenter" width="246"]<a href="https://www.earth.com/wp-content/uploads/2018/08/creationism.jpg"><img class="size-medium wp-image-1217639" src="https://www.earth.com/wp-content/uploads/2018/08/creationism-246x300.jpg" alt="" width="246" height="300" /></a> Image Credit: UNSW[/caption]

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By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Paid for by <a href="http://earth.com">Earth.com</a>

Australian study shows steep decline in belief in creationism

Belief in evolution – or lack there of – has...

A report from the <a href="https://www.umms.org/ummc">University of Maryland Medical Center</a> (UMMC) is providing new insight into illicit drug use. The study highlights the complexity of treating patients at hospital emergency rooms for drug overdoses.

The investigation began in 2016 when researchers set out to determine what caused two drug overdoses in patients at separate hospitals in Maryland.

Emergency room doctors were battling a spike in accidental <a href="https://www.earth.com/news/drug-related-deaths-hardest/">drug overdoses</a> and related fatalities, which were believed to be linked to drugs called synthetic cannabinoids that mimic the chemicals in marijuana. These drugs are known on the street as Spice or K2. 

The doctors were observing “atypical overdoses,” in which patients had difficulty breathing and constricted pupils. They responded well to the opioid overdose-reversing drug naloxone, but then had to be sedated for agitation, violence, and hyperactivity - none of which were related to opiate withdrawal.

Around the same time, researchers at the <a href="http://www.cesar.umd.edu/">Center for Substance Abuse Research</a> (CESAR) were detailing illicit drug use patterns in criminal justice settings using sophisticated analyses of urine samples. The CESAR researchers decided to use their urine testing technique for the first time in hospital settings, and collaborated with UMMC physicians to do so.

The team tested 175 urine samples for 26 synthetic cannabinoids, 59 designer drugs, and 84 other illicit and prescription drugs. The results showed that the substances used by these emergency department overdose patients were much more complex than expected.

“We were thoroughly amazed that in a study where we thought everyone was having a synthetic cannabinoid-related problem, only one specimen tested positive for synthetic cannabinoids,” said lead investigator Dr. Eric Wish.

The street drugs had been tweaked into new combinations that were still not being detected. Ultimately, only a quarter of the samples tested positive for synthetic cannabinoids, which was much lower than anticipated.


The study also revealed a huge discrepancy between the drugs patients said they had taken, what doctors suspected they had taken, and the actual drugs detected. 

"We had cases where the doctors thought so, the patient thought so, but urinalysis showed no use of synthetic cannabinoids," said Dr Bradford Schwartz

Marijuana was the most common individual drug detected at both hospitals. In addition, as many as a third of patients tested positive for a new psychoactive substance other than synthetic cannabinoids.

Two-thirds of patients tested positive for multiple substances, and some specimens contained as many as six substances, potentially complicating an overdose diagnosis.

In Baltimore, people tested positive primarily for fentanyl, a highly potent synthetic opioid that many patients did not even know they had ingested. In Prince George's County, the main drug detected besides marijuana was PCP, a hallucinogenic drug that can trigger aggression.

"These results suggest that supportive care is safe in patients suffering from acute intoxication from synthetic cannabinoids," said Dr. Dezman.

He explained that “it is important to inform patients of the risks of their substance use once they are stabilized.” 

“Policy makers and public health officials cannot make informed policy decisions about combating fentanyl if we do not know the prevalence of fentanyl use in the community.”
--
By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

New wave of street drugs are complicating the work of ER doctors

A report from the University of Maryland Medical Center (UMMC) is...

The amygdala, an almond-shaped structure in the <a href="https://www.earth.com/news/brainprints-new-fingerprints/">brain</a>, has been considered central to the experience and perception of fear for many years. But now, new research has revealed that the role of the amygdala is much more complicated than previously thought.

The study's author, Dr. Lisa Feldman Barrett, is a research scientist at the Athinoula A. Martinos Center for Biomedical Imaging at <a href="https://www.massgeneral.org/">Massachusetts General Hospital</a>.

“Scientists originally hypothesized that the amygdala contained the circuitry necessary for fear and its related behaviors,” said Dr. Barrett. “They continually broadened their hypotheses for the amygdala's role with accumulating research in both humans and non-human animals. The amygdala was then thought to contain the circuitry for negative emotions, for emotions in general, and eventually, for anything broadly effective, such as threat.”

“Through the natural process of systematic scientific investigation, it's become clearer that the amygdala plays a role in signaling the rest of the brain to information that is important to learn because it is relevant to allostasis - the brain's process of anticipating the needs of the body and attempting to meet those needs before they arise. Whether threatening, rewarding or novel, this to-be-learned information will help the brain better predict future occasions.”


Ever since a study by University of Chicago researchers Heinrich Klüver and Paul C. Bucy was published in the 1930s, the amygdala has been associated with fear. The authors described transformative behavioral changes in rhesus monkeys after they had this region of their brains removed. The monkeys became unafraid of approaching snakes and other threatening animals.

According to Dr. Barrett, experts had concluded the amygdala was integral to a central fear system in the brain by the early 1990s. However, the perception of the amygdala's role began to change around 1994, when a team at the University of Iowa College of Medicine began to publish studies of a patient with rare bilateral lesions of the amygdala resulting from a condition known as Urbach-Wiethe disease. 

The experts found that the patient was unable to recognize facial expressions of fear, underscoring the earlier conclusions about the role of the amygdala. 

Further trials with the patient revealed that she had difficulty perceiving facial expressions of other emotions when those expressions involved a widening of the eyes.


Dr. Barrett explained that these findings led to the development of new theories about the role of the amygdala in the experience and perception of fear. It now seems that the amygdala does not directly control fear, but is involved in a person's ability to attend to the whites of another person's widened eyes. This is more important to social functioning.

“The amygdala is not necessary to experience or perceive fear,” said Dr. Barrett. “Amygdala neurons very likely contribute to fear in some instances, but the neurons can't be said to actually compute fear. More likely, amygdala neurons act as a context-sensitive sentinel for learning threat and reward.”


“The original hypotheses about the amygdala's role in fear turned out not to be supported after careful study across decades. This is a good example of how the scientific method, at its best, works.”

Dr. Barrett's paper is published in the journal <a href="https://www.cell.com/trends/neurosciences/home">Trends in Neurosciences</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

The amygdala plays a complex role in how we experience fear

The amygdala, an almond-shaped structure in the brain, has been...

A new study published by Jonathan Mummolo, assistant professor of Politics and Public Affairs at <a href="https://www.princeton.edu/">Princeton University</a>, has revealed that militarized policing is not an effective way to reduce crime and protect police. Professor Mummolo has found that the militarization of police may actually weaken the public's image of them.

Four years ago this month, 18-year-old Michael Brown was fatally shot by a police officer in Ferguson, Missouri. Police agencies in the area reacted to protests using a militarized response, which was strongly criticized in the media.

Those who support militarized police units say that this approach helps to protect police officers and prevent violence, while critics argue that these tactics are aimed at racial minorities and weaken the trust that citizens have in <a href="https://www.earth.com/news/community-racial-bias-linked-police/">law enforcement</a>.


Professor Mummolo set out to test several claims about the costs and benefits of militarized policing. For his investigation, he used administrative crime and officer safety data, survey experiments, and records of where militarized police units were created and deployed.


Professor Mummolo found that militarized policing does not lead to less violent crime or less violence against police officers. In addition, the appearance of militarized police in the news can harm the reputation of the police and change how they are perceived by the public. 

The study also revealed that militarized police units are most often created in communities of color. The overall findings indicate that the elimination of militarized police may be the best move for both officers and citizens.

“The routine use of militarized police tactics by local agencies threatens to further the historic tensions between marginalized groups and the state with no detectable public safety benefit,” said Professor Mummolo.

The study was focused on Special Weapons and Tactics (SWAT) deployments, as the formation of SWAT teams represent an increased commitment to the use of militarized equipment and tactics.

Professor Mummolo built a nationwide panel measuring whether and when roughly 9,000 law enforcement agencies obtained a SWAT team between 2000 and 2008. He also obtained data on all SWAT activity in Maryland over a five-year period, and compared the SWAT deployments with the number of violent crimes and officers who were killed or injured.

The study found that creating more SWAT teams and increasing SWAT deployments had little to no benefits in terms of crime reduction or officer safety.

The results of the analysis also showed that citizens have a negative reaction to the appearance of militarized police units in news reports, which makes them less likely to fund police or to support police patrols in their neighborhoods.

“These results come after a single exposure to militarized images. Repeated public exposure to news items featuring militarized policing may amplify negative views of law enforcement among citizens,” said Professor Mummolo. “This is concerning because past research indicates that negative views of the police hinder criminal investigations and are associated with stunted civic participation.”

The study is published in the journal <a href="http://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: Egan Jimenez, <a href="https://www.princeton.edu/">Princeton University</a>

Paid for by <a href="http://earth.com">Earth.com</a>

Militarization of police does more harm than good, study finds

A new study published by Jonathan Mummolo, assistant professor of...

A new infection spread by ticks has reached epidemic levels in Mexico near the American border and it could soon spread to the US. 

Researchers recently conducted a report examining the Rocky Mountain Spotted Fever (RMSF) bacterial infection, which is spread by two kinds of tick, and in the most extreme cases can be fatal.

RMSF has been known to cause flu-like symptoms, common of other <a href="https://www.earth.com/news/tick-populations-climate-change/">tick-spread diseases</a>, as well as a rash. If left untreated, the infection can cause hearing loss and sometimes paralysis. 

In Mexicali, a town on the Mexican-American border, at least 4,00 people have contracted the infection since 2008 resulting in several hundred deaths. 

In the U.S, Rocky Mountain Spotted Fever has been reported before and according to the <a href="http://www.dailymail.co.uk/health/article-6068009/America-poised-outbreak-deadly-tick-fever-spreading-Mexico-doctors-say.html">Daily Mail</a>, there are about 3,000 cases every year.

However, new research has found that in the recent outbreaks in Mexico, infected people have higher concentrations of the virus than in previous years. 

If this spreads to the United States, it could have devastating consequences. 

Currently, Rocky Mountain Spotted Fever is caused by tick bites from the American dog tick and the Rocky Mountain wood tick, but the recent outbreak in Mexicali and the reason for the higher viral loads was traced back to another carrier, the brown dog tick. 

According to recent research, the brown dog tick is more likely to bite people, which is why epidemiologists are concerned about a quick spreading outbreak of RMSF in the US. 

Researchers from the <a href="https://www.ucdavis.edu/">University of California Davis</a> and the <a href="https://en.wikipedia.org/wiki/Autonomous_University_of_Baja_California">Universidad Autónoma de Baja California</a> in Mexicali collected blood samples from 16 Mexican patients that had been bitten by brown dog ticks. 

The patients’ blood had higher levels of the virus which means the brown dog tick for whatever reason carries a much more potent strain of RMSF than the other ticks known to spread the infection. 

Yet, the recent report did not have any explanations for why this might be. 

“I was absolutely startled,” Janet Foley, one of the researchers, <a href="https://www.nbcnews.com/health/health-care/new-tick-causes-epidemic-rocky-mountain-spotted-fever-n901046">told NBC News</a>. That's a very big epidemic of a fatal disease. There are likely thousands of cases.”

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer 

Image Credit: CDC

New deadly tick infection could spread from Mexico to the US

A new infection spread by ticks has reached epidemic levels...

Seeing animals in the wild can be an exciting and awe-inspiring tourism opportunity. From cruising on an African safari to whale watching in the expansive sea, vacations and wildlife encounters often intertwine. These interactions can make for a great photo and even spark an interest in wildlife <a href="https://www.earth.com/news/climate-change-fish-conservation/">conservation</a>, but they can also have a dark side.

On a recent vacation to San Diego, California, I experienced wildlife tourism firsthand. All of the travel blogs I read urged me to head up the coast to see the neighborhood of La Jolla which is known for their seals and sea lions, so I decided to make a pit stop.

I first watched the seals atop a stone bridge which looked down onto the beach, providing a physical barrier between the tourists and the wild animals. The seals slept, played and swam through the water, seemingly indifferent to our presence as tourists cooed and snapped photos.

As I walked towards the rocks where the sea lions sunbathed, I noticed numerous signs warning visitors that it was against federal law to feed or harass the sea lions. When I reached the top of the rocks, it was clear why the signs were there.

There were at least a half dozen tourists walking up to a small group of sea lions, within feet of the wild animals smiling for selfies. The sea lions were clearly distressed and tried to scurry away from the tourists as the tourists kept following them. One mother sea lion ran off, leaving her newborn pup behind alone. The pup laid lifeless on the rocks while people posed for photos next to him.

While the mothers may leave their pups to find food, <a href="http://www.marinemammalcenter.org/">The Marine Mammal Center</a> in California warns visitors not to take selfies with newborn animals as the mothers can get scared and abandon their pups. Thankfully during my visit, the mother eventually returned to her pup as the crowds thinned out but I still left the beach feeling deflated. The fun day of sightseeing had slowly turned into a glimpse into the potential problems with human-wildlife encounters.

The sea lions I saw that day are protected by the Marine Mammal Protection Act. The act prohibits the feeding, harassment, hunting, capture, collecting and killing of marine mammals. Despite the signs displayed all throughout the beach outlining the act, tourists proceeded without caution. A local activist has filmed<a href="https://www.10news.com/news/activists-takes-video-of-seal-harassment"> hours of footage</a> of tourists petting, chasing and taking pictures with seals and sea lions at La Jolla beaches.

These close encounters not only stress out the animals involved but put the public at risk. According to<a href="https://www.greateratlantic.fisheries.noaa.gov/stories/2016/may/26_no_selfies_with_seals.html"> NOAA Fisheries Greater Atlantic Region</a>, “Getting too close to a wild animal puts you—and the animal—at risk. Seals have powerful jaws, and can leave a lasting impression. We have received reports of a number of injuries to humans as a result of getting too close to an animal during a quick photo op.”

Wildlife attacks can occur when humans encroach upon wild animals’ habitat. Last month, a polar bear was shot to death by cruise officials after the boat docked in the animals’ territory. Cruise ship workers exited the ship to survey the area and encountered a polar bear. The workers ended up shooting the animal after attempts to scare him off were unsuccessful.

This occurred on an island where the 3,000 polar bears outnumber the locals. In addition to being a protected species under the Marine Mammal Protection Act, the polar bear is also listed as “vulnerable”.

When tourists travel to a destination, they are a visitor. In cases of human-wildlife encounters, they are a visitor to the animals’ natural habitat. As visitors, we need to remain respectful and courteous as our actions may mean life or death for the animal.

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By <a href="mailto:brianna.grant134@gmail.com">Brianna Lynne</a>, <a href="http://earth.com">Earth.com</a> Contributing Writer

When tourists get too close to wildlife, it won’t end well

Seeing animals in the wild can be an exciting and...

The science of beauty is simpler than you might expect. Famed poet John Keats once wrote, “a thing of beauty is a joy forever,” though he certainly was not the only writer to illustrate our fascination with beauty in words.

Poets, philosophers, writers, and psychologists have long looked at what draws us to beauty, but recently a new study examined the concepts beauty with science. 

Researchers from <a href="https://www.nyu.edu/">New York University</a> conducted an analysis of beauty and found that the driving factors behind how we respond to and process something aesthetically pleasing are much simpler than was previously realized.The science of beauty is simpler than you might expect 

“It is widely assumed that the experience of beauty requires prolonged contemplation. But our primer reveals that a fraction of a second is enough,” said Aenne Brielmann, the lead author of the study. 

The results were published in the journal Current Biology. 

The research is part of a growing field of study called empirical aesthetics which is a branch of psychology that delves into the experiences of beauty and art. 

Understanding why we respond to <a href="https://www.earth.com/news/social-media-beauty-standards/">beauty the way we do</a> is important because it is one of the main motivations behind consumer spending. The beauty industry alone is worth <a href="https://www.forbes.com/sites/chloesorvino/2017/05/18/self-made-women-wealth-beauty-gold-mine/#5f308bc72a3a">445 billion dollars</a>.

Trends by themselves can’t dictate consumer buying motivation, as companies must also work to create products and services that appeal to the public’s drive to own beautiful things or improve personal features.

For the study, the researchers analyzed writings on beauty from Plato, Oscar Wilde (19th-century novelist and playwright), Alexander Baumgarten (18th-century philosopher), and Gustav Fechner (psychologist). 

“Beauty is famously subjective and supposed to be intractable by science, but some of its key properties follow simple rules,” said  Denis Pelli, a co-author of the paper. “Philosophers have long supposed that the feeling of beauty is a special kind of pleasure. Yet, our analysis of research in the field shows that the feeling of beauty may merely be a very intense pleasure, not otherwise special”

The researchers found that while symmetry can enhance beauty, it doesn’t mean that there isn’t room for personal tastes and subjectivity. 

Instead, the researchers found that, as philosophers from centuries past claimed, beauty is a feeling of pleasure. When we’re faced with something beautiful, it stimulates activity in the pleasure centers of our brain. 

The results, according to the researchers, could help better explain what motivations drive consumer spending and decision making. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com</a> Staff Writer

The science of beauty is simpler than you might expect

The science of beauty is simpler than you might expect....

People commonly embrace the idea that things we experience in life are “meant to be,” or that “everything happens for a reason,” which is referred to as teleological thinking. Researchers have now found that this type of reasoning is linked to two beliefs which are seemingly unrelated - creationism and conspiracism.

Creationism is the belief that life on Earth was purposely created by a supernatural agent, while conspiracism is the tendency to explain events in terms of conspiracy theories.

“We find a previously unnoticed common thread between believing in creationism and believing in conspiracy theories,” said Sebastian Dieguez of the <a href="https://www3.unifr.ch/home/en/">University of Fribourg</a>. “Although very different at first glance, both these belief systems are associated with a single and powerful cognitive bias named teleological thinking, which entails the perception of final causes and overriding purpose in naturally occurring events and entities.”


Dieguez said that, for example, a teleological thinker finds truth in statements such as “the sun rises in order to give us light” or “the purpose of bees is to ensure pollination.” 

“This type of thinking is anathema to scientific reasoning, and especially to evolutionary theory, and was famously mocked by Voltaire, whose character Pangloss believed that ‘noses were made to wear spectacles.’ Yet it is very resilient in human cognition, and we show that it is linked not only to creationism, but also to conspiracism.”


Dieguez and his team determined that conspiracism does not reject the idea that the world is random and complex, and that it still could be linked to the belief that events are actively designed to serve a purpose.

The experts also noticed that the notion of conspiracism seemed to be “strikingly similar” to creationism. They proposed that conspiracism should be associated with teleological thinking and creationism.


To investigate, the researchers presented over 150 college students in Switzerland with a questionnaire that included teleological claims and conspiracist statements. The individuals also reported on magical beliefs and were tested for analytical thinking skills.

The survey data showed that the tendency toward creationism was significantly correlated with conspiracist belief levels. A strong association between creationism and conspiracism was also discovered in data from a large-scale survey of people in France. The experts followed up with an online survey that involved over 700 participants, and these results also confirmed their proposed theory.

“By drawing attention to the analogy between creationism and conspiracism, we hope to highlight one of the major flaws of conspiracy theories and therefore help people detect it, namely that they rely on teleological reasoning by ascribing a final cause and overriding purpose to world events,” said Dieguez. “We think the message that conspiracism is a type of creationism that deals with the social world can help clarify some of the most baffling features of our so-called 'post-truth era.'”

The study is published in the journal <a href="https://www.cell.com/current-biology/home">Current Biology</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Paid for by <a href="http://earth.com">Earth.com</a>

Belief in creationism, conspiracy theories follow similar thinking

People commonly embrace the idea that things we experience in...

A new study led by the Center for Injury Research and Policy at <a href="https://www.nationwidechildrens.org/">Nationwide Children's Hospital</a> has reviewed data from a survey that was focused on <a href="https://www.earth.com/news/texting-styles-relationship/">texting</a> while driving among teens. 

Across 34 of the 35 states included in the Youth Risk Behavior Survey, it is illegal for drivers under the age of 21 to text. Regardless, the study revealed that nearly two out of every five teen drivers age 14 years and older had texted while driving at least once in the month prior to the survey.

Cell phone use while driving has been estimated to increase crash risk by up to nine times. Texting while driving is particularly risky because it involves three types of driver distraction: visual, manual,  and cognitive. This means that while drivers are texting they take their eyes off the road, hands off the wheel, and their attention away from driving.

The incident of texting while driving varied by state from a low of 26 percent in Maryland to 64 percent in South Dakota. Among states with a lower minimum learner's permit age, texting while driving was more prevalent among teenagers. In all five states where more than 50 percent of teen drivers reported texting while behind the wheel, the learner's permit age was 15 years or younger.

The study also revealed that white teens were more likely to text while operating a vehicle than those of other races or ethnicities. Between the ages of 15 and 16, the incident of driving and texting doubled, before continuing to increase substantially for ages 17 years and up.

“The increase in texting while driving at the age when teens can legally begin unsupervised driving was not surprising,” said study lead author Dr. Motao Zhu. “Graduated driver licensing laws could have an impact on texting while driving behavior: the earlier teens start driving, the earlier they start texting while driving.”

Teens who were engaging in other risky driving behaviors were also more likely to text while driving. For example, teens who reported drinking and driving were almost twice as likely to text while behind the wheel.

“Risky driving behavior is known to be much less common with an adult in the car,” said study co-author Dr. Ruth Shults. “The association between age and texting while driving highlights the need for parents to pay attention to their child's texting while driving throughout the teen years - not just when their children are learning to drive.”

The study is published in the <a href="https://www.jahonline.org/">Journal of Adolescent Health</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Nearly 40 percent of teen drivers text while behind the wheel

A new study led by the Center for Injury Research...

Water levels at Lake Mead, the world’s largest reservoir, have dropped around 130 feet since the 1990s. The unprecedented rate of drying up is evidenced by the growing “bathtub ring” around the lake, where the newly exposed rock from the water levels dropping starkly contrasts to the rock face above. 

Lake Mead is just one major water source along the Colorado River Basin, a system of reservoirs and rivers that supply water to 40 million people and 6,300 square miles of farmland, according to the <a href="https://www.apnews.com/3789860ef4e44f17b5b6de7000aaa4a7/Vital-US-reservoir-OK-for-now,-but-shortages-are-looming">Associated Press. </a>

Because so many people rely on the river basin, and that seven states must work together to determine water distribution, the Colorado River Basin is controlled through a complex network of treaties and agreements. 

The policies that dictate how the Colorado River Basin is divided up are completely unique to the needs of the people and states that draw water from it. 

While <a href="https://www.earth.com/news/colorado-river-drought/">Lake Mead</a> and the river system may be able to meet water demands for now, the long-lasting drought that the southwest has been experiencing shows no signs of letting up and could lead to major shortages after September 2019. 

The Associated Press reported on a forecast from the <a href="https://www.usbr.gov/">U.S Bureau of Reclamation </a>that shows that demand will increase and water levels will continue to drop which will prompt mandatory rationing in the southwest. 

“If these projections materialize, we're very quickly going to lose control of how to manage the deteriorating conditions on the Colorado River,” John Entsminger, general manager of the <a href="https://www.snwa.com/">Southern Nevada Water Authority</a> told the Associated Press. 

How Nevada, Arizona, and the other states that need water from the river system will handle any impending shortages will depend on contingency plans set in place to avoid rationing and the amount of snow and precipitation that the area sees in the coming months. 

Even so, according to the Bureau, there is a 52 percent chance that a shortage will occur in 2019. 

Plans and negotiations to deal with the shortage are taking longer than expected because of how the area is governed. 

Currently, Arizona is having the most difficulty coming to a unified position which would enable negotiations for water management to continue effectively. 

The new forecast spells out a bleak future from the Colorado River Basin and it looks like Lake Mead’s infamous bathtub ring is only going to get wider as more and more of the water system dries up. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Major water shortages forecast as crucial reservoir levels drop

Water levels at Lake Mead, the world’s largest reservoir, 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

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

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Today’s Video of the Day from the <a href="https://www.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?

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

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Today’s Video of the Day from the <a href="https://www.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

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

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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"

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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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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...