As the new year approaches, millions prepare to adopt healthier eating habits. However, experts warn that this well-intentioned shift towards "clean" eating can sometimes go too far, leading to a dangerous obsession known as orthorexia nervosa. 



Researchers, including those from Semmelweis University in Hungary, caution that overly restrictive “clean eating” diets can result in physical malnutrition and severe mental health issues.



<h2 class="wp-block-heading" id="h-allure-of-clean-eating">Allure of clean eating</h2>



In recent years, clean <a href="https://www.earth.com/news/world-food-day-fighting-global-hunger/" target="_blank" rel="noreferrer noopener">eating</a> has become synonymous with health and discipline. For many, this lifestyle promises physical vitality and mental clarity.



Yet, a survey conducted by <a href="https://semmelweis.hu/english/" target="_blank" rel="noreferrer noopener">Semmelweis University</a> of 179 female fashion models revealed that over one-third showed symptoms of orthorexia nervosa - an unhealthy fixation on eating only “pure” foods. Alarmingly, about one-fifth of the control group, comprising students, exhibited similar tendencies.



Orthorexia nervosa manifests when an individual’s dedication to healthy eating disrupts their daily life. Warning signs include avoiding social gatherings, such as family meals or holiday celebrations, due to dietary restrictions. 



People with this condition often experience stress when their eating routines are disrupted and may suffer from physical symptoms like hair loss, brittle nails, and chronic fatigue.



<h2 class="wp-block-heading" id="h-risks-of-restrictive-diets">Risks of restrictive diets</h2>



Dr. Nikolett Bogar of Semmelweis University emphasizes the dangers of such restrictive <a href="https://www.earth.com/news/feeding-children-healthy-diets-can-be-very-challenging/" target="_blank" rel="noreferrer noopener">diets</a>. 



“If someone eats only certain types of food - for example, fish, vegetables, green foods, raw items, or exclusively carbohydrate-free dishes - they can just as easily develop nutrient deficiencies as those with eating disorders,” said Dr. Bogar. “They don’t consume enough vitamins, minerals, protein or carbohydrates.”



The obsession with food quality over quantity is particularly concerning. While prioritizing healthy foods is important, it often leads to nutritionally inadequate diets. Severe cases of orthorexia nervosa can even escalate to clinical eating disorders, such as anorexia or bulimia.



<h2 class="wp-block-heading" id="h-a-growing-trend-of-clean-eating">A growing trend of clean eating </h2>



The research highlighted a startling reality: 90% of participants reported aspiring to <a href="https://www.earth.com/news/sustainable-diets-can-reduce-environmental-pressure/" target="_blank" rel="noreferrer noopener">healthy</a> and clean eating, mirroring the cultural obsession with slimness from past decades.



Statistics indicate that around 35% of people attempt to adopt healthier diets in January following indulgent holiday seasons.



However, experts warn against categorizing foods as strictly good or bad. Dr. Bogar advises embracing a balanced, long-term dietary approach. 



“Eating should not simply be seen as a source of nutrients but a social and cultural event, especially during the festive season and the following weeks,” said Dr. Bogar.



<h2 class="wp-block-heading" id="h-origins-of-orthorexia-nervosa">Origins of orthorexia nervosa</h2>



Orthorexia nervosa, first introduced in 1997 by American physician Steven Bratman, describes an unhealthy fixation on consuming only "pure" or "clean" foods. 



Unlike other eating disorders, orthorexia focuses more on the quality of food rather than its quantity. Although widely discussed in medical and psychological circles, it is not yet officially recognized as an eating disorder in diagnostic manuals.



<h2 class="wp-block-heading" id="h-consequences-of-eating-disorders">Consequences of eating disorders</h2>



Dr. Bratman observed that extreme clean eating trends could lead to severe consequences, both physical and psychological. Individuals with orthorexia often isolate themselves socially, avoiding gatherings where their <a href="https://www.earth.com/news/modern-human-diets-pose-many-risks-health-environment/" target="_blank" rel="noreferrer noopener">specific dietary preferences</a> cannot be met.



This isolation can promote anxiety and stress, further compounding the mental toll. Over time, their limited food choices may result in malnutrition, depriving the body of essential nutrients. In extreme cases, this obsession can even lead to life-threatening outcomes.



Orthorexia impacts both men and women equally and is often linked to personality traits like perfectionism and narcissism. Many individuals with orthorexia strive for an ideal of purity or perfection in their eating habits. 



Interestingly, studies suggest that the underlying motivation for this behavior is not low self-esteem, as seen in some other eating disorders. Instead, it often stems from a desire to feel superior to others, using their strict dietary discipline as a marker of personal virtue.



<h2 class="wp-block-heading" id="h-setting-new-dietary-goals">Setting new dietary goals</h2>



For those setting new dietary goals in January, experts recommend aiming for moderation. Dr. Bogar highlights the importance of indulgence without guilt. 



“Aim for a long-term, balanced diet rather than an ultra-clean one in January. Occasionally indulging in chocolates or holiday treats should be part of your diet – without guilt,” she added.



Ultimately, food should nourish the body and enrich life through shared cultural and social experiences. By embracing balance, individuals can avoid the pitfalls of orthorexia and maintain both physical and mental health.



This study, published in the journal Eating and Weight Disorders, serves as a timely reminder to approach clean eating and dietary resolutions with caution and self-compassion.



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Obsession with eating 'clean' might result in eating disorders

As the new year approaches, millions prepare to adopt healthier eating habits. However, experts warn that this well-intentioned shift towards "clean" eating can sometimes go too far, leading to a dangerous obsession known as orthorexia nervosa. Researchers, including those from Semmelweis University in Hungary, caution that overly restrictive “clean eating” diets can result in physical malnutrition and severe mental health issues. Allure of clean eating In recent years, clean eating has become synonymous with health and discipline. For many, this lifestyle promises physical vitality and mental clarity....

Researchers at the <a href="https://www.oist.jp/">Okinawa Institute of Science and Technology Graduate University</a> (OIST) have investigated the relationship between serotonin levels and behavior in mice, with a particular focus on how serotonin may affect patience.

Serotonin is a chemical produced in nerve cells that influences how neurons function. Serotonin has been linked to a range of behaviors, such as mood, sleep, <a href="https://www.earth.com/news/brain-cravings-sweet-foods/">cravings</a>, and spontaneity. 

The chemical’s influence on human behavior has made it a focal point in the development of ways to treat mental health disorders. For example, selective serotonin receptor inhibitors (SSRIs) are the most common antidepressants, which are used to block the reabsorption of serotonin and make it more available in the brain.


Study co-author Dr. Katsuhiko Miyazaki explained: “Serotonin has had a lot of study in pharmacology, and serotonergic drugs are commonly prescribed, but the role that serotonin has over behavior isn't clear.”

The mice were trained to perform a task to receive a food reward, which involved placing their noses into a small hole and waiting. The team wanted to determine whether mice would wait for the reward regardless of the probability of it turning up or the length of time they had to wait.

The study revealed that an increase of serotonin did not always boost patience. When the mice had a 75 percent chance of a reward, they were willing to wait beyond the typical three-second period to receive a reward.

However, when the probability of reward delivery was cut down to 50 or 25 percent, an increase in serotonin had no effect on the amount of time the mice were willing to wait. “The patience effect only works when the mouse thinks there is a high probability of reward,” said Dr Miyazaki.

A boost of serotonin was also found to influence the mice to wait longer when the timing of a reward was harder to predict.

To better understand the results of the analysis, the team constructed a computational model to interpret the experimental data. 

The model showed that serotonin influenced how confident the mice felt that they would receive food when the reward was perceived as being more likely. For example, serotonin made the mice behave as if there was a 95 percent chance of reward in trials that had a 75 percent reward probability. 

According to the model, serotonin stimulation also increased the mice's confidence that they were in a reward trial versus a no-reward trial when the probability of receiving food was harder to predict, which delayed their decision to stop waiting.

The results show that the relationship between the activation of serotonin and subsequent behavior is highly dependent on the animals' perception of the circumstances, which may have implications for understanding how serotonin-boosting drugs affect humans.

 “This could help explain why combined treatment of depression with SSRIs and Cognitive Behavior Therapy (CBT) is more effective than just SSRIs alone,” said Dr. Miyazaki. “The psychological boost of the therapy is enhanced by raised serotonin levels.”

The study is published in the journal <a href="https://www.nature.com/ncomms/">Nature Communications</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Serotonin helps the brain stay patient, new study finds

Researchers at the Okinawa Institute of Science and Technology Graduate...

Walking faster can actually increase the length of your life. Researchers at the <a href="https://sydney.edu.au/">University of Sydney</a> have found that walking faster comes along with some potentially life-saving benefits. The risk of all-cause mortality was reduced by 20 percent in people who reported walking at an average pace, while the risk was lowered by 24 percent among those who kept a fast pace.

The researchers also investigated the effect of <a href="https://www.earth.com/news/ancient-humans-walking-upright/">walking</a> speeds on heart health, and found that the risk of cardiovascular disease mortality can be reduced by up to 24 percent as well - simply by walking faster.


The health advantages of picking up the pace while walking were found to be the most pronounced in older adults aged 60 and over. Older individuals who walked at an average pace had a 46 percent reduction in the risk of fatal cardiovascular causes. Among fast walkers, the risk of death from cardiovascular disease was reduced by 53 percent.

“A fast pace is generally five to seven kilometers per hour, but it really depends on a walker's fitness levels; an alternative indicator is to walk at a pace that makes you slightly out of breath or sweaty when sustained,” explained study lead author Professor Emmanuel Stamatakis.

The research team used data from 11 surveys in England and Scotland conducted between 1994 and 2008, in which participants self-reported their walking pace. They linked mortality records with these results, while adjusting for factors such as age, sex, and body mass index.

“Walking pace is associated with all-cause mortality risk, but its specific role - independent from the total physical activity a person undertakes - has received little attention until now,” said Professor Stamatakis.

“While sex and body mass index did not appear to influence outcomes, walking at an average or fast pace was associated with a significantly reduced risk of all-cause mortality and cardiovascular disease. There was no evidence to suggest pace had a significant influence on cancer mortality however.”


According to the researchers, the study findings highlight a need for emphasis on walking pace in public health messages.

“Separating the effect of one specific aspect of physical activity and understanding its potentially causal association with risk of premature death is complex,” said Professor Stamatakis.

“Assuming our results reflect cause and effect, these analyses suggest that increasing walking pace may be a straightforward way for people to improve heart health and risk for premature mortality - providing a simple message for public health campaigns to promote.”

“Especially in situations when walking more isn't possible due to time pressures or a less walking-friendly environment, walking faster may be a good option to get the heart rate up - one that most people can easily incorporate into their lives.”

The research is published in the <a href="http://bjsm.bmj.com/">British Journal of Sports Medicine</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Walking faster can actually increase the length of your life

Walking faster can actually increase the length of your life....

It has previously been thought that the first people to enter the Americas divided into two ancestral branches, one northern and one southern. The northern branch were the direct ancestors to many Native communities now living in the Canadian east. The southern branch is thought to have given rise to all the populations in Central and South America. However, for the first time, a new study has found that the majority – and potentially all – of the Indigenous peoples of the southern continent retain at least some DNA from the northern branch deep in their genetic history.

The study is published in the journal <a href="http://www.sciencemag.org/">Science</a>, and shows that – while the two branches may have remained separate for thousands of years – they actually came back together either before or during the expansion of people into <a href="https://www.earth.com/news/endangered-south-american-forests/">South America</a>. Researchers analyzed 91 ancient genomes from sites in California and Canada, which show that after the first peoples separated into two populations between 18,000 and 15,000 years ago, the northern branch migrated east to the great lakes region. The researchers believe this population may have been following the retreating glacial edges of the thawing Ice Age. The southern branch is believed to have continued down the Pacific coast, inhabiting islands along the way.

But analysis of Central and South American genomes reveals that the two branches “reconverged” despite being separated for millennia. The study’s authors say that there must have been one or more “admixture” events between the two populations roughly 13,000 years ago. This blending of lineages occurred either in North America before they expanded south, or as people migrated even deeper into the southern continent.

“It was previously thought that South Americans, and indeed most Native Americans, derived from one ancestry related to the Clovis people,” says Dr. Toomas Kivisild, co-senior author of the study from the <a href="https://www.cam.ac.uk/">University of Cambridge</a>. The Clovis culture – named for the 13,000-year-old stone tools found near Clovis, New Mexico – were a prehistoric people once believed to be ancestral to all Native Americans. “We now find that all native populations in North, Central and South America also draw genetic ancestry from a northern branch most closely related to Indigenous peoples of eastern Canada. This cannot be explained by activity in the last few thousand years. It is something altogether more ancient,” Kivisild says.

Interestingly, when present day Central and South American populations were analyzed in this study, the highest proportion of northern branch genetics in South America was found very far south in southern Chile. “It’s certainly an intriguing finding, although currently circumstantial – we don’t have ancient DNA to corroborate how early this northern ancestral branch arrived,” explains Dr. Christiana Scheib, who conducted the work while at the <a href="https://www.cam.ac.uk/">University of Cambridge</a> and is first author of the study. “It could be evidence for a vanguard population from the northern branch deep in the southern continent that became isolated for a long time – preserving a genetic continuity.”

The researchers believe that more should be done to include Indigenous communities in ancient DNA studies in the Americas. Genetic analysis of ancient people may have an adverse effect for linked Indigenous communities, but engagement work can help mitigate harm to the community and give Indigenous peoples a voice in the research.

“The lab-based science should only be a part of the research. We need to work with Indigenous communities in a more holistic way," says Schieb. “From the analysis of a single tooth, paleogenomics research can now offer information on ancient diet and disease as well as migration. By developing partnerships that incorporate ideas from Native communities, we can potentially generate results that are of direct interest and use to the Indigenous peoples involved.”

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

The first Americans separated in two groups before reconverging

It has previously been thought that the first people to...

Experts led by <a href="https://wsu.edu/">Washington State University</a> are reporting that politics have become an unwelcome guest to Thanksgiving dinner. The researchers found that Thanksgiving visits were around 50 minutes shorter following the <a href="https://www.earth.com/news/public-health-2016-election/">2016 presidential election</a>.

The study also revealed that travelers from media markets with intense political advertising spent even less time visiting on the holiday.

“Politics actually affects how long we spend at Thanksgiving dinner,” said study co-author Ryne Rohla. “Also, these partisan differences are inflamed by political advertising.”

Rohla and co-author Keith Chen had both experienced uncomfortable, politically alienating Thanksgiving dinners just after the 2016 election. After the fact, they read reports of other Americans who had canceled or cut short Thanksgiving visits “with their most politically problematic relatives.”

“The fact that political polarization is increasingly degrading our close connections with friends and family didn't have much empirical study and attention from social scientists,” said Chen. “That's where we leapt off with this project.”

The team used anonymous cell phone data from the locations of over 10 million users, distinguishing between home locations in the weeks before Thanksgiving and the locations of the users on Thanksgiving afternoon. This information was combined with voting data, and the proportion of Democratic and Republican votes in the home precincts was used to classify the individuals.

When users visited precincts that had different voting tendencies than their own, they stayed 30 to 50 minutes less than the average Thanksgiving visit of 4.2 hours in 2015. Those traveling from Republican precincts to Democratic ones tended to shorten their visits by 50 to 70 minutes, while those going from Democratic regions to Republican ones tended to shorten their visits by 20 to 40 minutes.

“That really sealed it for us, that this was definitely a political effect,” said Chen. “It's not just because families that have members that cut across political boundaries are different somehow. In 2016, those are the families that were hurt the most and they were hurt especially in places where there was a lot of political advertising. That same thing is not true in 2015, before these ads were run.”

“Altogether, an estimated 33.9 million person-hours of cross-partisan discourse were eliminated, perhaps creating a feedback mechanism by which partisan segregation reduces opportunities for close cross-party conversations,” wrote the researchers.

The experts view the study findings as a signal that values such as trust and cooperation are weakened with less civic engagement. Chen described civic institutions as being experiences like “close family ties and conversation over Thanksgiving dinner,” which he said are supposed to help preserve our social networks and relationships.


“Some people don't see losing dinner with relatives as a particularly large cost,” said Rohla. “I've talked to people who are, ‘Well, so what?’ Personally I think it is concerning. To me it's a symptom of a broader decline in the social fabric of the United States.”

The research is published in the journal <a href="http://www.sciencemag.org/">Science</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Thanksgiving dinners became much shorter after the 2016 election

Experts led by Washington State University are reporting that politics...

The idea of eating “farm to table” has become popular in recent years, spurred by the fact that the production and transportation of <a href="https://www.earth.com/news/fit-people-physical-responses-food/">food</a> has a major impact on the environment. Thus, the closer your food sources are to your table, the smaller your impact on the environment. But how does the production of certain foods affect the environment more than others? This is the question researchers at <a href="http://www.ox.ac.uk/">Oxford University</a> and the Swiss Agricultural Research Institute, <a href="https://www.agroscope.admin.ch/agroscope/en/home.html">Agroscope</a>, set out to answer.

The researchers have recently created the most comprehensive database ever for the environmental impacts of almost 40,000 and 1,600 processors, packaging types, and retailers. These assessments help to determine how certain production practices and geographies impact the environment for 40 major foods.

In their assessment, they found significant differences in environmental impact between producers of the same product. High-impact beef producers create 105kg of CO2 equivalents and use 370m2 of land per 100 grams of protein. This is between 12 and 50 times more than low-impact beef producers. Yet low-impact beef producers still use 36 times more land and create 6 times more emissions than pea producers.

While aquaculture is assumed to result in relatively little emissions, it can actually emit more methane and create more greenhouse gases than cows per kilogram of live weight. For example, one pint of beer can create three times more emissions and use four times more land than another. The researchers observed this variation of impacts across all five indicators they analyzed, including water use, eutrophication, and acidification.

“Two things that look the same in the shops can have very different impacts on the planet,” explains Joseph Poore from the Department of Zoology and the School of Geography and Environment at <a href="http://www.ox.ac.uk/">Oxford University</a>. “We currently don’t know this when we make choices about what to eat. Further, this variability isn’t fully recognized in strategies and policy aimed at reducing the impacts of farmers.”

Shockingly, just a small number of producers create the brunt of the environmental impact. About 15% of beef production is responsible for roughly 1.3 billion tons of CO2 equivalents and uses about 950 million hectares of land. Across all products assessed, 25% of producers contributed an average of 53% of each product’s environmental impacts.

[caption id="attachment_1214980" align="aligncenter" width="996"]<a href="https://www.earth.com/wp-content/uploads/2018/05/food-production.jpg"><img class="size-large wp-image-1214980" src="https://www.earth.com/wp-content/uploads/2018/05/food-production-1024x810.jpg" alt="" width="996" height="788" /></a> Image Credit: Joseph Poore[/caption]

“One of the key challenges is finding solutions that are effective across the millions of diverse producers unique to agriculture,” says Poore. “An approach to reduce environmental impacts or enhance productivity that is effective for one producer can be ineffective or create trade-offs for another. This is a sector where we require many different solutions delivered to many millions of different producers.”

The study’s authors believe that utilizing new technology could help producers limit their impact. Current technology even works on mobile devices, taking information on inputs, outputs, climate, and soil – quantifying environmental impacts. This technology then provides recommendations on how to reduce these impacts and increase productivity.

Ultimately, even with technological advances, diet change is still the easiest and most dramatic way we can mitigate the effect of food production on our environment. Animal product-free diets are likely to deliver more environmental benefits than changing production practices. Plant-based diets reduce food’s emissions by as much as 73%, depending on where you live. 

If you’re able to make small behavioral changes in your diet, they can create a multiplier effect and result in a significant reduction in environmental impact. This includes eating fewer animal-based products, avoiding the highest impact producers, and lowering consumption of discretionary products, such as oils, alcohol, and sugar. It would also be helpful for producers to be required to communicate their environmental impacts to consumers.

“We need to find ways to slightly change the conditions so it’s better for producers and consumers to act in favor of the environment,” says Poore. “Environmental labels and financial incentives would support more sustainable consumption, while creating a positive loop: Farmers would need to monitor their impacts, encouraging better decision making; and communicate their impacts to suppliers, encouraging better sourcing.”

The research was published in the journal <a href="http://science.sciencemag.org/content/360/6392/987">Science</a>.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Production of the same foods impacts the Earth in different ways

The idea of eating “farm to table” has become popular...

A new tool could help fishermen increase their yields while still protecting at-risk species to the benefit of both the fishing industry and conservationists. 

No-fishing zones <a href="https://www.earth.com/news/no-fishing-zones-penguins/">proven successful in the protection</a> and restoration of endangered and threatened species, but they can present a hindrance to fishermen. 

Currently, protection zones are often static and don’t reflect the constant variations in ocean conditions, which means fishermen may not be able to meet their target quotas or end up catching protected species as bycatch anyway. 

Conservationists and fishers have long had difficulty finding common ground between protecting and making a profit. 

Now, a tool called EcoCast could be just the solution both the fishing industry and conservation scientists have been looking for. 

EcoCast was developed by researchers from <a href="https://www.sdsu.edu/">San Diego State University</a> in collaboration with the <a href="http://www.noaa.gov/">National Oceanic Atmospheric Administration</a> (NOAA) and provides computer-generated maps of zones that could meet fishing quotas while avoiding areas with protected species. 

“This is a really different way of approaching fisheries management," said Rebecca Lewison, a lead scientist on the project. “EcoCast pioneers a way of evaluating both conservation objectives and economic profitability. Instead of trying to shut down U.S. fisheries, EcoCast is trying to help U.S. fishermen fish smarter, allowing them to meet their set quota of target catch and avoid unwanted bycatch.”

A new report outlining EcoCast’s development and potential was recently published in the journal Science Advances. 

EcoCast collects data from the <a href="https://coastwatch.noaa.gov/">NOAA's CoastWatch program</a>, which monitors ocean conditions worldwide with satellites. Fishers will receive up to date reports daily noting where protected fish populations are likely to be located.  

The tool warns fishers of potential bycatch locations for leatherback sea turtles, blue sharks, and California sea lions but could be expanded to include more species and areas. 

“We're harnessing the field of big data so that information on ocean conditions can be of use to fishermen," said Elliott Hazen, the lead author of the new paper.

After demonstrating the way EcoCast could be used by fishermen, the researchers discovered that the tool could still protect species but reduce no-fishing zones, making them two to ten times smaller and giving fishers more pace to meet their quotas. 

“EcoCast represents a new approach to dynamically manage our ocean resources, which is an exciting advance in fisheries management,” said Lewison. “By working directly with fisheries, we can develop tools that can help US fleets to fish smarter.”

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandett</a>e,<a href="https://www.earth.com/"> Earth.com</a> Staff Writer

New technology helps fishermen and conservationists both win

A new tool could help fishermen increase their yields while...

The European Commission has proposed new laws which have been designed to eliminate the <a href="https://www.earth.com/news/plastic-pollution-galapagos-islands/">plastic</a> waste that is most commonly washing up on Europe's beaches. The European Union's governing body is targeting the 10 single-use plastic products which, along with fishing gear, account for 70 percent of the marine litter in Europe.

If the legislation is passed by the 28 Member States, some disposable plastics such as straws and cutlery will be completely banned across the European Union, while plastic food containers and cups will be largely reduced.

A <a href="http://europa.eu/rapid/press-release_IP-18-3927_en.htm">press release</a> from the European Commission explains that different measures will be used for different products.

“Where alternatives are readily available and affordable, single-use plastic products will be banned from the market. For products without straight-forward alternatives, the focus is on limiting their use through a national reduction in consumption.”

The initiative will make plastic producers financially responsible for some of the waste management and clean-up associated with their products. For example, producers of plastic fishing gear will be required to cover the costs of waste collection as well as the costs of awareness-raising measures.

The proposed law will also make it mandatory for countries across the European Union to collect 90 percent of single-use plastic drink bottles by 2025.

The European Commission explained that the incentive to develop more sustainable solutions will give companies in Europe a competitive edge in taking the technological lead over global competitors.

First Vice-President Frans Timmermans is responsible for sustainable development in the EU. He said that plastic waste is “undeniably a big issue and Europeans need to act together to tackle this problem.”

“Across the world, plastics make up 85% of marine litter,” the Commission stated. “And plastics are even reaching people's lungs and dinner tables, with microplastics in the air, water and food having an unknown impact on their health.” 

“Tackling the plastics problem is a must and it can bring new opportunities for innovation, competitiveness and job creation.”

For World Environment Day on June 5th, the European Commission will launch an EU-wide awareness campaign which will highlight how individual consumers can help to combat plastic pollution and marine litter.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

European Union has moved to ban certain single-use plastics

The European Commission has proposed new laws which have been...

There has been a significant amount of research in both humans and animals that supports the importance of social connections for preserving the mind and improving quality of life. But the cause and effect is not very well known. Is it that having a group of friends helps us keep our minds intact, or is it that people with declining brain health tend to withdraw from human connection? Researchers from <a href="https://www.osu.edu/">Ohio State University</a> set out to answer these questions with an animal model.

Elizabeth Kirby, an assistant professor of behavioral neuroscience and member of the <a href="https://wexnermedical.osu.edu/neurological-institute/departments-and-centers/research-centers/center-for-chronic-brain-injury">Center for Chronic Brain Injury</a> at Ohio State, led research that determined mice living in groups had better memories and healthier brains than those that lived in pairs. In her study, some mice lived in pairs – which Kirby referred to as the “old-couple model,” while others were housed for three months with six other mice. According to the researchers, this scenario allowed for complex interactions.

The mice used in the study were between 15 and 18 months old, which is the time when their natural memory begins to decline. “It’s like mouse post-retirement age,” explains Kirby. “If they drove, they’d be forgetting where the keys are or where they parked the car more often.”

Researchers then ran the mice through a series of memory tests. One test looked to see if the mice recognized that a toy had been moved to a new location. 

“With the pair-housed mice, they had no idea that the object had moved,” says Kirby. “The group-housed mice were much better at remembering what they’d seen before and went to the toy in a new location.”

Another test was a common maze-based memory test. Mice were put on a well-lit table with holes, some of which led to escape hatches. The animals’ natural tendency is to look for dark, unexposed, safe escape routes. While both groups of mice improved their escape-route strategies over time, there were major differences in the groups’ response to repeated tests. When repeated over the course of a day, the “coupled” mice didn’t get any faster. But over many days, they came up with a “serial-searching strategy” in which they checked every hole as quickly as possible.

“It’d be like walking as quickly as possible through each row of a parking lot to look for your car rather than trying to remember where your car actually is and walk to that spot,” explains Kirby.

On the other hand, the group-housed mice improved with each trial. 

“They seemed to try to memorize where the escape hatches are and walk to them directly, which is the behavior we see in healthy young mice,” says Kirby. “And that tells us that they’re using the hippocampus, an area of the brain that is really important for good memory function.” The serial searching that the coupled mice employed is a much simpler strategy, and doesn’t require use of the hippocampus.

For humans and mice – as well as many other animals – brain function in the hippocampus declines with age. Exercise and social interaction are known to help preserve memory in this region in humans. 

When the tests were completed, the researchers analyzed the brain tissue of the mice, and found increased inflammation in the coupled mice, which is evidence of eroded cognitive health. 

“The group-housed mice had fewer signs of this inflammation, meaning that their brains didn’t look as ‘old’ as those that lived in pairs,” says Kirby.

This research gives us a good look at the effects of socialization on brain health. The authors state that people should consider their social choices as they age, and how they might impact their overall brain health.

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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

Social connections found to help slow brain aging

There has been a significant amount of research in both...

<a href="https://www.earth.com/news/exercise-slow-heart-aging/">Exercise</a> has the benefit of not only helping you feel physically fit, but it’s well known that it can help keep you mentally fit as well. Although studies have shown that consistent exercise may improve thinking skills, it’s not known how much exercise is needed for there to be a benefit. In an effort to establish some guidelines, researchers performed review of all studies where older adults were asked to exercise for at least four weeks and perform tests of thinking and memory skills.

This review – published in the online issue of <a href="http://cp.neurology.org/">Neurology Clinical Practice</a> – compared the thinking and memory skills of older adults who exercised against those of people who did not have an exercise routine.

Researchers looked through 98 randomized, controlled trials with over 11,000 participants total, with an average age of 73. They collected data on exercise session length, intensity, weekly frequency, and amount of exercise over time. The most common form of exercise was aerobic exercise, such as walking, biking, or dancing. Some studies combined aerobic exercise and strength or resistance training, while others just did strength training alone. A few studies used mind-body exercises such as yoga or Tai chi. 

Analysis of the data showed that both healthy people and those with cognitive impairment had improved brain processing speed with longer term exposure to exercise (at least 52 hours over an average of six months). For healthy people, that same amount of exercise also improved executive function, which is the ability to manage time, pay attention, and achieve goals.

“These results suggest that a longer-term exercise program may be necessary to gain the benefits in thinking skills,” says study author Joyce Gomes-Osman, PT, PhD, of the <a href="http://med.miami.edu/">University of Miami Miller School of Medicine</a>. “We were excited to see that even people who participated in lower intensity exercise programs showed a benefit to their thinking skills. Not everyone has the endurance or motivation to start a moderately intense exercise program, but everyone can benefit even from a less intense plan.”

However, there was no link found between the amount of exercise and improved memory skills. “Only the total length of time exercising could be linked to improved thinking skills,” says Gomes-Osman. “But our results may also provide further insight. With a majority of participants being sedentary when they first enrolled in a study, our research suggests that using exercise to combat sedentary behavior may be a reason why thinking skills improved.”

Further studies may be able to determine which thinking abilities gain the greatest improvements with consistent exercise, as well as the short- and long-term effects of exercise in both physically fit and sedentary people.

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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

Regular exercise found to improve memory and thinking skills

Exercise has the benefit of not only helping you feel...

Archaeologists have found evidence to dispute the commonly accepted theory of how the first-ever Americans arrived. Scientists now believe that this migratory route may have occurred along Alaska's coast by sea, which is a far cry from the concept that a route was trekked from Siberia to Canada on foot.

At the end of the last ice age, a major passageway opened up between huge ice sheets, exposing land that connected North America to Asia across the Bering Sea. This was believed to be the way the first Americans arrived, by crossing the Bering land bridge.

But now, a research team led by the <a href="http://www.buffalo.edu/">University of Buffalo</a> has analyzed rock sediment that reveals a coastal <a href="https://www.earth.com/news/ancient-alaskan-hunters-advanced/">Alaskan</a> migration route had become accessible around 17,000 years ago. Recent studies suggest that new settlers may have traveled deeper into the Americas 16,000 years ago, which corroborates the new theory.

“People are fascinated by these questions of where they come from and how they got there,” said study lead author Dr. Jason Briner. “Our research contributes to the debate about how humans came to the Americas. It's potentially adding to what we know about our ancestry and how we colonized our planet.”

“Our study provides some of the first geologic evidence that a coastal migration route was available for early humans as they colonized the New World,” said study first author Alia Lesnek. “There was a coastal route available, and the appearance of this newly ice-free terrain may have spurred early humans to migrate southward.”


Ancient seal bones that date back approximately 17,000 years provide further evidence that the Alaskan coast could have supported human life at this time.

According to Dr. Briner, the path that had opened up in Canada did not develop enough biological diversity to support human life until about 13,000 years ago.

The new migration theory provides an alternative narrative, and may help to solve the mystery of how humans came to the Americas.

“Where we looked at it, the coastal route was not only open - it opened at just the right time,” said study co-author Dr. Charlotte Lindqvist. “The timing coincides almost exactly with the time in human history that the migration into the Americas is thought to have occurred.”

The study is published in the journal <a href="http://advances.sciencemag.org/">Science Advances</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Human migration to the Americas may have taken a different route

Archaeologists have found evidence to dispute the commonly accepted theory...

Researchers at <a href="https://www.columbia.edu/">Columbia University</a> have found that our sweet food cravings may be completely eliminated by manipulating a region of the brain which regulates emotions known as the amygdala.

The <a href="https://www.earth.com/news/brains-fixated-social-lives/">brain</a> has a very complex system which produces memories and emotions, among other thoughts, when tasting food. The current study indicates that this system can be manipulated by isolating, modifying, or removing its units.

Study senior author Dr. Charles S. Zuker is a principal investigator at Columbia's Mortimer B. Zuckerman Mind Brain Behavior Institute.


“When our brain senses a taste it not only identifies its quality, it choreographs a wonderful symphony of neuronal signals that link that experience to its context, hedonic value, memories, emotions and the other senses, to produce a coherent response,” explained Dr. Zuker.

A team led by Dr. Zucker has formerly demonstrated that specialized cells on the tongue send signals when they encounter one of the five tastes: sweet, bitter, salty, sour, or umami. Once a particular taste is identified by the brain, specific behaviors or reactions are triggered.

The amygdala is a region of brain that is associated with making value judgments about sensory information. The current study was focused on sweet and bitter taste regarding this specific area of the brain.
The previous research by Dr. Zuker confirmed that the amygdala is directly connected to the taste cortex.

Study first author Dr  Li Wang is a postdoctoral research scientist in the Zuker lab.

“Our earlier work revealed a clear divide between the sweet and bitter regions of the taste cortex,” said Dr. Wang. “This new study showed that same division continued all the way into the amygdala. This segregation between sweet and bitter regions in both the taste cortex and amygdala meant we could independently manipulate these brain regions and monitor any resulting changes in behavior.”


A study focused on mice showed that removing the animal’s capacity to crave or dislike certain foods had no influence on its ability to identify the taste.


The team manipulated the mice so that the sweet or bitter connections to the amygdala were turned on or off. When the sweet connections were turned on, the animals responded to water just as if it were sugar. 

By altering the same connections, the researchers discovered they could even change the way that a taste was perceived, turning a sweet taste into a bitter one, or vice versa.


On the other hand, when the experts turned the amygdala connections off, but left the taste cortex unaffected, the mice could still recognize and distinguish sweet from bitter. However, they no longer had a preference for either taste, suggesting that the emotional reaction to either taste had also been turned off.

“It would be like taking a bite of your favorite chocolate cake but not deriving any enjoyment from doing so,” said Dr. Wang. “After a few bites, you may stop eating, whereas otherwise you would have scarfed it down.”


The brain usually associates the identity of a food and the pleasure of its taste, but the study demonstrated that these components can actually be cut off from each other and can be controlled independently.


“Our goal is to piece together how those regions add meaning and context to taste,” said Dr. Wang. “We hope our investigations will help to decipher how the brain processes sensory information and brings richness to our sensory experiences.”

The research may have new implications for treating eating disorders including obesity and anorexia nervosa.

The study was published in the journal <a href="https://www.nature.com/nature/">Nature</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Scientists working to switch off brain cravings for sweet foods

Researchers at Columbia University have found that our sweet food...

A team of experts from the <a href="https://www.leeds.ac.uk/">University of Leeds</a> have used natural dye extracted from blackcurrant waste to develop an effective new technology for coloring hair.

“We've made it possible to have great hair color, and to get it from nature in the most sustainable way possible,” said study co-author Professor Chris Rayner.

More people are coloring their hair all the time, and the industry brings in around ten billion dollars every year.

However, some of the ingredients found in the most commonly-used hair dyes are derived from petrochemicals, which are known to trigger severe allergic reactions and have even been suspected to cause cancer.

The ingredients used in permanent hair dyes, particularly those used to achieve darker colors, are the main concern. For example, some hair dye that is considered “natural” includes henna and its counterpart lawsone, which the EU Scientific Committee on Consumer Safety has deemed toxic.

Another concern about hair dye is that up to 95 percent of it is believed to be washed down the drain, and the potential environmental impacts from this are not yet known.

Dr. Richard Blackburn is a color chemist who heads the Sustainable Materials Research Group in the School of Design. He teamed up with Professor Rayner, who is an organic chemist, to identify natural substitutes for the chemicals in hair dye. 

“Because of issues and concerns around conventional dyes, we wanted to develop biodegradable alternatives that minimize potential risks to health and offer consumers a different option,” explained Dr. Blackburn.

The team combined expertise in extraction technology, hair science, coloration, and natural products chemistry to create a method of extracting anthocyanins from blackcurrant fruit waste.

“Anthocyanins are pigments that provide color to most berries, flowers, and many other fruits and vegetables,” said Dr. Blackburn. “They are non-toxic, water-soluble and responsible for pink, red, purple, violet, and blue and colors and are widely used as natural food colorants all over the world.”

“We knew they bound strongly with proteins - hair is a protein - so we thought if we could find an appropriate source of these natural colors, we might be able to dye hair.”

Around 90 percent of British blackcurrants are used in the production of Ribena. The berries are harvested in late summer and then pressed for <a href="https://www.earth.com/news/floridas-citrus-trees-struggle/">juice</a>.


“After being pressed, the skins remain as a waste product. They have very high concentrations of anthocyanins, and represent a sustainable supply of raw material because of how much blackcurrant cordial we drink.”

“The extraction technology is based on sustainable concepts - the color is extracted using a water-based process and special filters collect the anthocyanins that we want. We believe that if we are extracting natural and food-grade products, we should not use any toxic or hazardous chemicals to get them.”


Professor Rayner also explained that, in an upcoming paper, his team details all of the extract’s natural compounds.


“We wanted to identify all of the natural compounds present to improve our technology and to ensure safety, which cannot be said of most 'natural' cosmetic brands, where there is little understanding of what is in ‘natural extracts.’ Natural does not necessarily equal safe.”

The researchers have now patented their technology, and the sustainable hair dyes will soon be available on the market.

The research is published in the <a href="https://pubs.acs.org/journal/jafcau">Journal of Agricultural and Food Chemistry</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

A new safe and sustainable hair dye developed from blackcurrants

A team of experts from the University of Leeds 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

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

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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"

[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...