We all know processed food isn't the best thing on the plate. But how do we navigate the confusing language of food labeling? A remarkable tool now helps consumers and policymakers understand the processing levels of over 50,000 different items.



Researchers from Mass General Brigham created this public database to promote informed food choices and advocate for better food regulation.



<h2 class="wp-block-heading" id="h-understanding-processed-foods-the-basics">Understanding processed foods - the basics</h2>



Processed foods are those that have been altered from their natural state in some way, usually to make them last longer or taste better. 



This includes things like freezing vegetables, canning beans, or adding salt and sugar to bread. These changes can be pretty simple and often retain most of the <a href="https://www.earth.com/news/most-baby-food-isnt-nutritious-despite-what-the-label-says/" target="_blank" rel="noreferrer noopener">original nutrients</a>. 



For example, a jar of tomato sauce or a bag of roasted nuts are considered processed foods because they've been prepared or packaged, but they still contain ingredients you’d recognize and are generally healthy when eaten in moderation.



On the other hand, ultra-processed foods go through much more extensive manufacturing and contain ingredients you wouldn’t normally find in a home kitchen. 



These foods often include artificial colors, flavors, preservatives, and other additives designed to enhance taste, texture, and shelf life. 



Think of things like sugary cereals, sodas, packaged snacks, instant noodles, and frozen dinners. Ultra-processed foods are usually higher in <a href="https://www.earth.com/news/high-fat-diets-cause-high-anxiety-through-changes-in-gut-bacteria/" target="_blank" rel="noreferrer noopener">unhealthy fats</a>, sugars, and salt, and they tend to be lower in essential nutrients.



<h2 class="wp-block-heading" id="h-processed-foods-dominate-grocery-shelves">Processed foods dominate grocery shelves</h2>



<a href="https://www.earth.com/news/ultra-processed-foods-make-our-bodies-age-faster/" target="_blank" rel="noreferrer noopener">Highly and ultra-processed foods</a> make up a significant portion of what is available in most grocery stores.



While they may be convenient or taste appealing, research has linked diets high in these types of foods to serious health issues, including obesity, diabetes, and heart disease.



Despite growing awareness about the risks associated with these <a href="https://www.earth.com/news/eating-ultra-processed-foods-makes-your-muscles-weaker-and-more-fragile/" target="_blank" rel="noreferrer noopener">foods</a>, many shoppers struggle to determine how processed a particular food item is. 



Ingredient labels and nutritional information can be overwhelming or unclear, making it difficult for the average consumer to make informed choices.



“There are a lot of mixed messages about what a person should eat. Our work aims to create a sort of translator to help people look at food information in a more digestible way,” said Dr. Giulia Menichetti, a lead researcher at <a href="https://www.brighamandwomens.org" target="_blank" rel="noreferrer noopener">Brigham and Women’s Hospital</a>.



<h2 class="wp-block-heading" id="h-grocerydb-simplifies-healthy-eating">GroceryDB simplifies healthy eating</h2>



To address the challenge of understanding <a href="https://www.earth.com/news/minimally-processed-foods-cost-more-offer-no-extra-nutrition/" target="_blank" rel="noreferrer noopener">food processing levels</a>, researchers applied machine learning to analyze detailed data from three major grocery retailers: <a href="https://www.target.com" target="_blank" rel="noreferrer noopener">Target</a>, Whole Foods, and Walmart. 



They examined ingredient lists, nutritional information, and pricing data to create a clear picture of the processing levels of various food items.



This effort led to the development of <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC11177926/" target="_blank" rel="noreferrer noopener">GroceryDB</a>, a comprehensive database tool designed to empower consumers with easy-to-understand information about processed food ingredients.



GroceryDB provides each food item with a "processing score," which indicates the degree of processing involved in the production of the food.



The database is accessible to the public through the&nbsp;<a href="https://www.truefood.tech" target="_blank" rel="noreferrer noopener">TrueFood</a>&nbsp;website, where users can explore essential details such as processing scores, ingredient breakdowns, and complete nutritional facts. 



This innovative tool simplifies the often-confusing task of evaluating food processing, making healthier choices more attainable for everyone.



<h2 class="wp-block-heading" id="h-not-all-grocery-stores-are-the-same">Not all grocery stores are the same</h2>



The researchers employed the FPro algorithm to analyze <a href="https://www.earth.com/news/health-risks-of-ultra-processed-foods-revealed-in-30-year-study/" target="_blank" rel="noreferrer noopener">food processing</a> levels across products from the three major grocery retailers. Their findings revealed that the majority of items available in these stores were classified as ultra-processed.



While <a href="https://www.wholefoodsmarket.co.uk" target="_blank" rel="noreferrer noopener">Whole Foods</a> stood out for offering a broader selection of minimally processed foods, Walmart and Target provided fewer options in this category. 



For example, cereals at Whole Foods showed a wide range, spanning from minimally to ultra-processed. In contrast, all cereals available at <a href="https://www.walmart.com" target="_blank" rel="noreferrer noopener">Walmart</a> and Target were categorized as highly processed.



This pattern extended beyond cereals to other product categories, including soups, milk substitutes, and cookies. Despite the apparent variety of brands and products on store shelves, the processing options remained strikingly limited. 



These findings highlight the challenge consumers face when trying to access healthier, less-processed food options, even in stores that appear to offer significant variety.



“When people hear about the dangers of ultra-processed <a href="https://www.earth.com/news/ultra-processed-foods-are-harmful-to-nearly-every-part-of-the-body/" target="_blank" rel="noreferrer noopener">foods</a>, they ask, ‘OK, what are the rules? How can we apply this knowledge?’” said Menichetti. “We are building tools to help people implement changes to their diet.”



<h2 class="wp-block-heading" id="h-ai-enters-the-fight-against-processed-foods">AI enters the fight against processed foods</h2>



This initiative demonstrates how artificial intelligence (AI) can play a transformative role in advancing public health. 



By leveraging AI and data science, the research team created a scalable system for analyzing and categorizing the processing levels of food items.



The team plans to enhance this database further by incorporating geolocation data and temporal monitoring. 



This expansion would provide insights into regional differences in food availability and how these variations influence social determinants of health, such as access to nutritious options.



“Most research activities in nutrition still depend on manual curation, but our study shows that artificial intelligence and data science can be used to scale up,” Menichetti emphasized. 



The ultimate goal is to make this an internationally comparable, open-access resource to advance global nutrition security.



With the TrueFood database, consumers now have the tools to make better informed food choices and push for healthier options in their communities.



The study was published in the journal <a href="https://www.nature.com/articles/s43016-024-01095-7" target="_blank" rel="noreferrer noopener">Nature Food</a>.



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New tool lets you check how processed and unhealthy your food is

We all know processed food isn't the best thing on the plate. But how do we navigate the confusing language of food labeling? A remarkable tool now helps consumers and policymakers understand the processing levels of over 50,000 different items. Researchers from Mass General Brigham created this public database to promote informed food choices and advocate for better food regulation. Understanding processed foods - the basics Processed foods are those that have been altered from their natural state in some way, usually to make them last longer...

A new study by scientists at <a href="https://www.harvard.edu/">Harvard University</a> and the Potsdam Institute for Climate Impact Research has reviewed the climate studies conducted or paid for by the oil and gas company currently known as ExxonMobil. The study, published in the peer-reviewed journal&nbsp;<a href="http://dx.doi.org/10.1126/science.abk0063">Science</a>, dives deeply into the company data from the late 1970s onwards (before Exxon and Mobil joined forces), in order to assess the accuracy of the climate projections produced by or on behalf of Exxon over several decades.&nbsp;



The results of the investigation are summarized in one single chart that displays every global warming projection reported by Exxon and ExxonMobil scientists between 1977 and 2003. The authors of the study collected their data from previously unreported information and models buried in the company’s own documents. They conclude that the projections are startlingly accurate and reveal that the company knew just how much global warming would occur and the damage that was attributable to the burning of fossil fuels.&nbsp;



In fact, the scientists have&nbsp;put a number on what ‘Exxon knew,’ decades ago, about climate science: that the burning of fossil fuels would lead to 0.20 ± 0.04 degrees Celsius of global warming per decade.&nbsp;



Although it has been widely reported that Exxon has known about the threat of global warming since the 1970s, this study is the first quantitative review of the company’s early climate science.&nbsp;Previous research focused on Exxon's inconsistent internal and external rhetoric on climate change, and the fact that the oil company understood the science before it became a public issue and then spent millions to promote misinformation.



“We find that most of their projections accurately forecast warming consistent with subsequent observations,” the report concludes. “Their projections were also consistent with, and at least as skillful as, those of independent academic and government models.”



The researchers used established statistical techniques that are also used by the Intergovernmental Panel on Climate Change (IPCC), the United Nations body that is responsible for assessing the science related to climate change. The researchers found that 63–83 percent of global warming projections reported by ExxonMobil scientists were consistent with subsequently observed temperatures changes. Moreover, projections modeled by ExxonMobil scientists had an average ‘skill score’ of 72 ± 6 percent, with the highest scoring 99 percent.&nbsp;



For comparison, NASA scientist Dr. James Hansen’s global warming predictions, presented to the U.S. Congress in 1988, had skill scores ranging from 38 percent to 66 percent.&nbsp;(When we account for differences between forecast and observed atmospheric CO2&nbsp;levels, the ‘skill score’ of projections modeled by ExxonMobil scientists was 75 ± 5 percent, with seven projections scoring 85 percent or above. Again, for comparison, Hansen’s 1988 projections had corresponding skill scores of 28 to 81 percent.)



The study finds that “Exxon and ExxonMobil Corp also correctly rejected the prospect of a coming ice age, accurately predicted when human-caused global warming would first be detected, and reasonably estimated the ‘carbon budget’ for holding warming below 2°C. On each of these points, however, the company’s public statements about climate science contradicted its own scientific data.”



It is clear from the study’s analysis that this company, the world’s largest oil and gas company, was in possession of accurate and reliable scientific information in the 1970s and 80s, and understood that&nbsp;mankind was indeed influencing the global climate through carbon dioxide release from the burning of fossil fuels. However, this did not stop the company from spending decades refusing to publicly acknowledge climate change and even promoting climate misinformation.



For example, in June 1988, when NASA scientist James Hansen told a congressional hearing that the planet was already warming, Exxon stated publicly that the science was still controversial. By 1989, the company had helped create the&nbsp;<a href="http://www.exxonsecrets.org/html/orgfactsheet.php?id=38">Global Climate Coalition</a>&nbsp;(disbanded in 2002) to question the scientific basis for concern about climate change. It also helped to prevent the U.S. from signing the international treaty on climate known as the Kyoto Protocol, in 1998, to control greenhouse gases.&nbsp;



The findings of the current study add weight to ongoing legal and political investigations into ExxonMobil and the extent to which the company’s personnel sowed doubt about the scientific basis for climate change predictions.



“These findings corroborate and add quantitative precision,” the authors write, “to assertions by scholars, journalists, lawyers, politicians, and others that ExxonMobil accurately foresaw the threat of human-caused global warming, both prior and parallel to orchestrating lobbying and propaganda campaigns to delay climate action, and refute claims by ExxonMobil Corp and its defenders that these assertions are incorrect.”



“This is the nail-in-the-coffin of ExxonMobil’s&nbsp;<a href="https://perma.cc/6GWL-V89E">claims</a>&nbsp;that it has been falsely accused of climate malfeasance,” commented study lead author Geoffrey Supran of Harvard University&nbsp;. “Our analysis shows that ExxonMobil’s own data contradicted its public statements, which included exaggerating uncertainties, criticizing climate models, mythologizing global cooling, and feigning ignorance about when – or if – human-caused global warming would be measurable, all while staying silent on the threat of stranded fossil fuel assets.”



An article published in the Guardian in 2019 finds that ExxonMobil is&nbsp;<a href="https://www.theguardian.com/environment/2019/oct/09/revealed-20-firms-third-carbon-emissions">one of 20 companies</a>&nbsp;responsible for one-third of energy-related global carbon emissions since 1965. In addition, half of the greenhouse gas emissions in our atmosphere were released after 1988. What a difference it would have made if the fossil-fuel companies, including ExxonMobil, had been upfront about this and had been part of the solution instead of the problem. We are likely to have been in much better environmental shape than we are now.&nbsp;



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Exxon’s climate predictions were remarkably accurate, but ignored

A new study by scientists at Harvard University and the...

Dolphins are highly intelligent, social mammals that tend to form alliances that rely on <a href="https://www.earth.com/news/dogs-use-their-tails-more-for-communication-than-movement/">communication</a> between group members. Their underwater calls consist of a series of whistles, that are used to communicate with conspecifics, and clicks that are used in echolocation to identify prey items and objects in their surroundings. The animals are able to carry out cooperative tasks, such as rounding up a school of fish, that depend on successful underwater communication with others in the group.



Given the importance of underwater sound communication to dolphins and other cetaceans, it is natural to be concerned that the increasing noise levels in oceans worldwide could have significant negative impacts on the successful functioning of these animal. Ocean bed drilling, the establishment of offshore wind turbines, and increasing shipping traffic all produce underwater noise that is potentially disruptive.&nbsp;



Previous studies have found that animals from several different taxa, including mammals, birds, fish and invertebrates, respond to increased noise levels in their environments and may adopt mitigation strategies such as modifying the frequency, amplitude and duration of their calls, orientating themselves to minimize the interference from the noise source, or even moving to an entirely different area.&nbsp;



However, little is known about how successful these compensatory mechanisms are at overcoming the impacts of noise disturbance when individuals are actively working together.&nbsp;



A new experimental study by scientists from the University of Bristol, U.K., Syracuse University in New York, The Dolphin Research Center in Florida, and the Woods Hole Oceanographic Institution in Massachusetts has now tested whether the ability of two dolphins (living in human care) to solve a cooperative task is impacted by the presence of anthropogenic noise at different intensities. The results are published in the journal <a href="http://dx.doi.org/10.1016/j.cub.2022.12.063">Current Biology</a>.



The two bottlenose dolphins (Tursiop struncatus.), known as Delta and Reece, had previously been trained to carry out a cooperative task that required them to understand the role their partner must play in the task, and use the sound of whistles to coordinate their behavior with extreme precision. The task required both dolphins to swim to their own stations at opposite ends of a pool. There, they had to press their own underwater button simultaneously with the other dolphin, or within a one-second time window.&nbsp;



The two dolphins were equipped with suction-cup sound recorders to document their vocalizations as they carried out the task. During each of the 200 trials, the dolphins were released from a starting point but, for certain trials, one of the dolphins was held back for five to ten seconds while the other was released immediately to swim to its underwater button. In the delayed-release trials, the dolphins had to rely solely on vocal communication to coordinate the button press with precision.



At the same time, the researchers chose five different noise-level categories. These were ambient noise level, and low, medium, high and very high noise treatments.&nbsp; A total of 20 trials was carried out at each noise level. The noise levels corresponded to 115 dB, 119 dB, 126 dB, 135 dB and 150 dB respectively, as recorded adjacent to each dolphin’s underwater button.



The researchers found that Delta and Reece were able to coordinate their button-pushing to within one second of each other in 85 percent of trials at the ambient (lowest) noise level. As the levels of noise played from an underwater speaker increased, both dolphins compensated by increasing the volume and duration of their whistles. Reese’s whistles were on average 1.85 times longer in the highest noise exposure trials than in the ambient noise trials, and Delta’s whistles were on average 1.66 times longer in the very high noise trials than in the ambient noise trials.



In addition to “shouting” louder and longer, the dolphins also changed their body positions to face each other more often, and swam to the other side of the pool to be closer to one another. Despite these strategies to help them cope with the loud noise, they were only able to achieve a success rate of 62.5 percent in trials at the highest noise level.&nbsp;



“This shows us that, despite them using these compensatory mechanisms, their communication was impaired by noise,” explained study first author Pernille Sørensen of the University of Bristol. “Our work shows that, despite their attempts to compensate, despite being highly motivated and the fact that they know this cooperative task so well, the noise still impaired their ability to successfully coordinate.”



“Those same reasons that make sound so advantageous for animals to use also make them susceptible to disturbance from noise in the environment,” said Sørensen. “Within the last couple of decades, we’ve seen a dramatic increase in human-made noise, and noise pollution in the oceans is no exception.”



While this research was conducted with dolphins living in human care, human-generated noise can potentially have detrimental effects on wild dolphins, too. “If groups of animals in the wild are, for example, less efficient at foraging cooperatively, then this will negatively impact individual health, which ultimately impacts population health,” said study co-author Stephanie King, associate professor at the University of Bristol.



“Our work shows that these adjustments are not necessarily enough to overcome the negative effects of noise on communication between individuals,” said Professor King. Since dolphins rely on their communication skills to successfully hunt and reproduce, noise levels can affect their behaviors, which in turn affect population health.



“This collaboration with international colleagues at the Dolphin Research Center provided us with a unique opportunity to investigate the impact of noise on animals working together in a controlled setting, something that is almost impossible to do in the wild,” said Sørensen. To study this in the wild, the researchers would need further understanding of when animals are actively working together and how cooperative behavior is coordinated. “Our results clearly show the need to account for how noise affects group tasks in wild animals."



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Dolphins must "shout" over underwater noise to communicate

Dolphins are highly intelligent, social mammals that tend to form...

A team of researchers led by the <a href="https://illinois.edu/">University of Illinois Urbana-Champaign</a> has developed a new <a href="https://www.earth.com/news/dna-can-help-predict-ecosystem-changes-when-animals-are-reintroduced/">DNA</a>-collection method that allows scientists to capture genetic information from wildlife without disturbing the animals or putting their own lives into jeopardy. The experts tested this protocol on elephant dung and managed to collect enough DNA to sequence the whole genomes not only of the elephants, but also of the microbes, plants, and other organisms associated to them.



“We combined existing methodologies in such a way that we are now able to use noninvasive samples to generate genome-scale data,” said&nbsp;study lead author Alida de Flamingh, a postdoctoral researcher in Genetics and Ecology at Illinois. “This allows us to assess wildlife populations without having to dart, capture, or immobilize animals.”



According to study co-author Alfred Roca, a professor of Animal Sciences at the same university, collecting DNA from animal dung is not something new. “Elephant fecal samples have been used for decades to study the genetics of elephants,” he said. “But this relies on very cumbersome methods, often involving chemicals that in some cases may be dangerous. The collections are bulky, they’re hard to ship and they have to be refrigerated, making the whole process very costly.”



Now, the researchers tested a less expensive alternative: using small data-collection cards that have previously been treated to prevent the samples from degrading, allowing to store them for months without refrigeration.



First, the scientists collected and analyzed samples from zoo elephants to determine how long after defecation the fecal samples would still yield viable genomic data. The analysis revealed that even after 72 hours, the samples could be reliably used for genomic sequencing. In a next step, the team tested this procedure on samples collected from wild African savanna elephants. The sequencing led to treasure trove of information.



“I was surprised. I thought we might get some elephant DNA from the cards, but I was thinking on the order of two percent. However, on average, more than 12 percent of the DNA was attributed to the elephant,” Roca reported.&nbsp;



Since this was achieved without using costly and time-consuming laboratory methods that target only elephant DNA, each sample yielded a vast amount of information not only about the elephants, but also the microbial composition of their guts, their habitat, and diet.



“It’s really beneficial to get an idea of everything that’s in there because now you can start asking questions, not only about elephant genomes but also about things like their health, their diet and whether there are pathogens or parasites present,” de Flamingh explained.



According to the researchers, when it comes to elephant genomes, the results are comparable with – or even better than - those obtained from blood samples. “You can explore the connectivity of different elephant populations, the level of genetic diversity, the level of inbreeding and relatedness among elephants. And I would say there are lots of reasons you don’t want to have to collect blood samples from wild elephants,” Roca said.



“It’s possible to do what you could do with blood, but it goes beyond that. You now can do analyses that you couldn’t do before with blood DNA, which only provides information about the elephant’s genome,” de Flamingh concluded.



The study is published in the journal <a href="http://dx.doi.org/10.3389/fgene.2022.1021004">Frontiers in Genetics</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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New DNA-collection method is harmless to wildlife

A team of researchers led by the University of Illinois...

As humans, we share many characteristics with other primates, such as <a href="https://www.earth.com/news/bonobos-early-human-evolution/">bonobos</a>, who – together with chimpanzees – are the ape species most closely related to us. While there are many similarities in the social behavior of bonobos and humans, a team of researchers led by <a href="https://www.universiteitleiden.nl/en">Leiden University</a> and the <a href="https://www.uva.nl/">University of Amsterdam</a> has recently found that there are also remarkable differences.&nbsp;



The experts discovered that, although both species are more interested in photos of conspecifics that show emotion than in neutral photos, human attention is more easily drawn to photos of family members or friends, whereas the attention of bonobos is drawn to the emotion of individuals they don’t know.



In a first experiment, the scientists trained bonobos from the <a href="https://apenheul.nl/">Apenheul</a> zoo to press a dot on a screen. After pressing it, two images appeared briefly that showed bonobos from the same group as well as unfamiliar conspecifics. While some images were neutral, others expressed emotions related to fear, play, or sex. Then, a dot appeared again behind one of the two images, and the bonobos had to touch it as quickly as possible in order to receive a food reward. 



The researchers kept track of how fast the bonobos pressed the dot that appeared after seeing the different pictures, with the presupposition that the apes would be faster at touching the dot behind the photo that immediately grabs their attention.



A second experiment presented people visiting the zoo with the same task, with photos of strangers or a person with whom they visited the zoo that day, and with varying facial expressions, such as neutral, happy, angry, or scared.&nbsp;



“In these studies, we saw that both humans and bonobos react more quickly to photos of conspecifics with an emotional charge than neutral photos,” said study lead author Evy Van Berlo, a postdoctoral researcher in Cognitive Behavioral Ecology at the University of Amsterdam. “That is what we expected: it makes sense given that we are both social animals. Yet there was also a remarkable difference. We humans are mainly focused on emotionally charged photos of people we know, while the attention of bonobos is focused on studying emotionally charged photos of unfamiliar others.”



According to the researchers, this evolutionary difference has probably emerged due to differences in the living environment of the two species. “Bonobos live in a relatively stable ecological environment in Congo, where there is enough food available. Under those circumstances, there is less need for competition with other groups and peaceful interaction with strangers might even be beneficial for the conservation of the species. Early humans, on the other hand, lived in nomadic groups that had to compete with other groups of humans for food. Under such circumstances, it is probably evolutionarily more beneficial to favor individuals from your own group over strangers,” Van Berlo explained.



In future research, the scientists plan to repeat this study with other species of great apes with different social organizations, such as chimpanzees, which are more competitive, male-dominated, and socially stratified. “With chimpanzees, for example, I would expect them to be more interested in the emotions of individuals they know than the emotions of strangers,” Van Berlo concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1037/emo0000882">Emotion</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Bonobos are more interested in the emotions of strangers

As humans, we share many characteristics with other primates, such...

Snow-capped mountains are valuable <a href="https://www.earth.com/news/parts-of-asia-face-irreversible-declines-in-freshwater-storage/">freshwater</a> resources that could potentially be wiped out by global warming in the coming decades. These "water towers" provide up to 80 percent of the world's freshwater, and more than half of the global population depends on mountain ecosystems for water, food, and energy.&nbsp;



Last year, a study co-led by Alan Rhoades and Erica Siirila-Woodburn of the <a href="https://www.lbl.gov/">Berkeley Lab</a> predicted that mountain ranges in the western United States will regularly experience low-to-no-snow winters in 35 to 60 years if greenhouse gas emissions are not reduced.



In a new study, Rhoades and his colleagues have determined that mountain ranges in the southern midlatitudes will face a low-to-no-snow future much sooner. These mountains, particularly in the Andean region of Chile, may transition to low-to-no-snow conditions as early as 2046.



According to the researchers, low-to-no-snow occurs when the annual maximum water stored as snowpack is within the bottom 30 percent of historical conditions for a decade or more. The study revealed that low-to-no-snow winters will emerge in the southern midlatitudes at a third of the warming compared to the northern midlatitudes.



“These findings are pretty shocking. We assumed that both regions in the southern and northern hemispheres would respond similarly to climate change, and that the Andes would be more resilient given its high elevation,” said Rhoades. “This shows that not every degree of warming has the same effect in one region as another.”



On a positive note, the researchers found that low-to-no-snow winters can be prevented in both the northern and southern midlatitude mountain ranges if global warming is limited to 2.5 degrees Celsius. Rhoades pointed to another study from the Berkeley Lab, which found that it is possible to reach net zero CO2 emissions in the United States by 2050. This could be accomplished by rebuilding the energy infrastructure to run primarily on renewable energy.



“It just requires the will and initiative to invest financial resources at the level of urgency that climate change demands, which means we need to start doing this today,” said Rhoades.



The research is published in the journal <a href="http://dx.doi.org/10.1038/s41558-022-01518-y">Nature Climate Change</a>.



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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



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Mountains face low-to-no-snow winters in a warming climate

Snow-capped mountains are valuable freshwater resources that could potentially be...

Being socially connected is vital to human wellbeing but this aspect of human functioning is often impaired in people who suffer the symptoms of depression or <a href="https://www.earth.com/news/artificial-sweetener-has-been-linked-to-anxiety/">anxiety</a>. They may feel withdrawn and tired, unable to find the energy or drive to interact with people. Many patients with depression tend to withdraw from social contact and would rather stay at home, or in bed, than face society.&nbsp;



A new study by researchers from <a href="https://www.osu.edu/">Ohio State University</a> has revealed that when depressed or anxious people perform acts of kindness towards others, the symptoms of their mental illness become less severe and they are able to heal themselves to a certain extent.&nbsp;&nbsp;



“Social connection is one of the ingredients of life most strongly associated with wellbeing. Performing acts of kindness seems to be one of the best ways to promote those connections,” said David Cregg, who led the research as part of his PhD dissertation.



Cregg and his colleague Professor Jennifer Cheavens tested their acts of kindness technique in an experiment involving 122 people from central Ohio who had moderate to severe symptoms of depression, anxiety, and stress.&nbsp;



After an initial introductory session, the participants were randomly allocated to one of three different groups.&nbsp; Two of the groups received interventions that are commonly used in cognitive behavioral therapy (CBT) treatments for depression. The first group was instructed to plan social activities for two days a week, and the members of the second group had to keep records, for at least two days a week, that helped them identify negative thought patterns and revise their way of thinking in order to reduce depression and anxiety (a form of cognitive reappraisal).&nbsp;



The participants in the third group were instructed to perform three acts of kindness a day, for two days out of each week. Acts of kindness were defined as “big or small acts that benefit others or make others happy, typically at some cost to you in terms of time or resources.” Examples of kind acts that participants performed included baking cookies for friends, offering to give a friend a ride, and leaving sticky notes with worlds of encouragement in places where s roommate would find them.



All three interventions continued for a period of five weeks. Participants were evaluated after week five, and then again after a further five weeks, to see whether the interventions were successful at reducing the symptoms of depression and anxiety.



The researchers’ findings, published in the <a href="http://dx.doi.org/10.1080/17439760.2022.2154695">Journal of Positive Psychology</a>, showed that helping others is a powerful technique for healing oneself. &nbsp;Although participants in all three groups showed an increase in sense of life satisfaction, and a reduction in depression and anxiety symptoms after the 10 weeks of the study, those participants in the acts of kindness group showed the greatest improvements.



“These results are encouraging because they suggest that all three study interventions are effective at reducing distress and improving satisfaction,” Cregg said. “But acts of kindness still showed an advantage over both social activities and cognitive reappraisal, by making people feel more connected to other people, which is an important part of well-being."



Cheavens noted that just taking part in social activities did not improve feelings of social connection in this study. In addition, the process of cognitive reappraisal also does not involve increasing social connectedness in any way. &nbsp;



“There’s something specific about performing acts of kindness that makes people feel connected to others. It’s not enough to just be around other people, participating in social activities,” she said.



The researchers also discovered why performing acts of kindness worked so well to improve the symptoms of people with depression or anxiety. It helped distract participants from their own suffering while they were reaching out to help and consider others.&nbsp;



“Doing nice things for people and focusing on the needs of others may actually help people with depression and anxiety feel better about themselves,” explained Cheavens.



“We often think that people with depression have enough to deal with, so we don’t want to burden them by asking them to help others. But these results run counter to that,” she said.



Cregg said that, while this study used techniques of CBT, it is not the same experience as going through a complete CBT treatment. Those who undergo the full treatment may have better results than those in this study. However, the findings do show that even the limited CBT exposure given in this study can be helpful to people with depression or anxiety.&nbsp;



“Not everyone who could benefit from psychotherapy has the opportunity to get that treatment,” she said.&nbsp;“But we found that a relatively simple, one-time training had real effects on reducing depression and anxiety symptoms.”



And even those who are able to get CBT treatment may benefit even more if they are encouraged to carry out acts of kindness towards others on a regular and ongoing basis. This study shows that helping others has a healing effect through creating vital social connections.



“Something as simple as helping other people can go above and beyond other treatments in helping heal people with depression and anxiety,” concluded Cregg.



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Acts of kindness can help relieve depression

Being socially connected is vital to human wellbeing but this...

A recent study led by the <a href="https://www.umass.edu/">University of Massachusetts Amherst</a> has found that the rate of <a href="https://www.earth.com/news/changes-in-climate-and-land-use-could-lead-to-catastrophic-levels-of-soil-erosion/">soil erosion</a> in the Midwestern U.S. is 10 to 1,000 times greater than pre-agricultural erosion rates. These newly discovered pre-agricultural erosion rates –reflecting the rates at which soils form – are much lower than the upper allowable limit of erosion set by the <a href="https://www.usda.gov/">U.S. Department of Agriculture</a> (USDA). These findings could have major repercussions for everything from domestic agricultural policy to global food security and climate change mitigation strategies.



The scientists made use of a rare element beryllium-10 (10Be), which forms when stars in our galaxy explode and send high-energy particles - called cosmic rays - rocketing towards the Earth. When this galactic shrapnel smashes into our planet’s crust, it splits oxygen in the soil apart, leaving small trace amounts of&nbsp;10Be, which can then be used to determine average soil erosion rates over the span of thousands to millions of years.



“We went to fourteen small patches of remnant native prairie that still exist in Iowa, Minnesota, South Dakota, Nebraska, and Kansas, and used a hand auger to collect deep soil cores, in material that dates back to the last Ice Age,” said&nbsp;study senior author Isaac Larsen, a professor of Geosciences at UMass Amherst. “We brought this soil back to our lab at UMass, sifted it to isolate individual sand grains, removed everything that wasn’t quartz, and then ran these few spoonfuls through a chemical purification process to separate out the&nbsp;10Be - which was just enough to fit on the head of a pin.”



The researchers then sent this sample to a laboratory, where the individual&nbsp;10Be atoms were counted in order to calculate a precise rate of erosion, stretching from the present day back to the last Ice Age (about 12,000 years ago). “For the first time, we know what the natural rates of erosion are in the Midwest,” said study lead author Caroline Quarrier, who completed this research as part of her master’s thesis at UMass Amherst. “And because we now know the rate of erosion before Euro-American settlement, we can see exactly how much modern agriculture has accelerated the process.”



The results were far from encouraging. “Our median pre-agricultural erosion rate across all the sites we sampled is 0.04 mm per year,” Larsen reported. Any modern-day erosion rate higher than that value means that soil is disappearing at a faster pace than it is accumulating.&nbsp;



Unfortunately, USDA’s current limit for erosion (one millimeter per year, so 25 times greater than the average rate the researchers found) will inevitably lead to rapid loss of topsoil, which plays a critical role not only for U.S. agriculture, but also for global food security, as well as climate change mitigation strategies that rely on soil as an important carbon sink.



However, according to the scientists, there is no reason to despair yet. “There are agricultural practices, such as no-till farming, that we know how to do and we know greatly reduce erosion,” Quarrier said. “The key is to reduce our current erosion rates to natural levels,” Larsen concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1130/G50667.1">Geology</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Soil erosion rates have exploded in the Midwestern US

A recent study led by the University of Massachusetts Amherst...

Scientists have been drilling and removing ice cores in <a href="https://www.earth.com/news/antarcticas-emperor-penguin-officially-listed-as-endangered/">Antarctica</a> for many years with the aim of identifying characteristics of Earth’s atmosphere and climate dating back hundreds of millennia. The concentration of carbon dioxide in air bubbles trapped in the ice gives clues about levels of this greenhouse gas in the past, and the ratios of different water isotopes present in the ice can reveal how temperatures in the Antarctic have changed.&nbsp;



Using information derived from Antarctic ice cores, scientists have previously identified that, going back 800,000 years, the Antarctic climate consisted of a succession of long, cold ‘glacial’ periods interspersed roughly every 100,000 years with warm "interglacial" periods (of which the last 11,000 years is the most recent).&nbsp;



Now, in a new study of ice core data, an international team of scientists led by the <a href="https://www.colorado.edu/">University of Colorado Boulder</a> has analyzed temperature changes on a seasonal scale, recording all the winter and summer temperatures going back 11,000 years to the start of the Holocene Period. Published in the journal&nbsp;<a href="http://dx.doi.org/10.1038/s41586-022-05411-8">Nature</a>, this study is the very first seasonal temperature record of its kind, from anywhere in the world.



“The goal of the research team was to push the boundaries of what is possible with past climate interpretations, and for us that meant trying to understand climate at the shortest timescales, in this case seasonally, from summer to winter, year-by-year, for many thousands of years,” said&nbsp;<a href="https://www.colorado.edu/instaar/tyler-jones">Tyler Jones</a>, lead author on the study, and assistant research professor and fellow at the&nbsp;<a href="https://www.colorado.edu/instaar/">Institute of Arctic and Alpine Research</a>&nbsp;(INSTAAR).



The researchers used data from the West Antarctic Ice Sheet (WAIS) Divide ice core, which is the longest ice core ever drilled by U.S. researchers. It was removed from a dome of ice in central West Antarctica in 2011 and measures 11,171 feet (3405 meters), which is over 2 miles long. This core contains atmospheric and climate data from as much as 68,000 years ago, although the researchers only used sections dating back 11,000 years.&nbsp;



For this study, the scientists analyzed a continuous record of water-isotope ratios from the WAIS ice core. The ratios between the concentration of these isotopes (elements with the same number of protons but different atomic masses) reveal information about past temperatures and atmospheric circulation, including transitions between ice ages and warm periods in Earth’s past.



In addition to providing the first data on summer and winter temperature changes in the recent past, the study also validates one aspect of a long-standing theory about Earth’s climate that has not been previously proven. It shows that seasonal temperatures in Polar Regions respond to Milankovitch cycles.&nbsp;



A century ago, Serbian scientist Milutin Milankovitch hypothesized that cyclical orbital changes in the Earth’s movement around its axis and around the sun, affect how much solar radiation reaches its surface, and can thus drive long-term climate changes and trigger the start and end of glaciation periods (ice ages).&nbsp;



“I am particularly excited that our result confirms a fundamental prediction of the theory used to explain Earth’s ice-age climate cycles: that the intensity of sunlight controls summertime temperatures in the polar regions, and thus melt of ice, too,” said Kurt Cuffey, a co-author on the study and professor at the University of California Berkeley.



It was not a straightforward matter to measure seasonal changes in Earth’s temperature from ice cores, due to their short timescales. Water isotopes tend not to stay in one place in the upper ice sheet, but instead move around in interconnected pathways (similar to the air pockets in Styrofoam) as they change states between vapor and ice, over decades or centuries, before solidifying. This process, known as diffusion, can “blur” the finely detailed data that the researchers were trying to examine.&nbsp;



Luckily the high-quality ice cores from the WAIS allowed high-resolution measurements down to seasonal level. This, along with recent advances in ice core analysis during the past 15 years, enabled the team to correct for the diffusion present in the data and obtain the detail they sought.



“Even beyond that, we had to develop new methods entirely to deal with this data, because no one’s ever seen it before. We had to go above and beyond what anyone’s done in the past,” said Jones.



“This research is something that humans can really relate to because we partly experience the world through the changing seasons – documenting how summer and winter temperature varied through time translates to how we understand climate,” he added.



These finely detailed data on long-term climate patterns of the past also provide an important baseline for other scientists, who study the impacts of greenhouse gas emissions on our present and future climate. By knowing which planetary cycles occur naturally and why, researchers can better identify the human influence on climate change and its impacts on global temperatures. Interestingly, they are confident that the current period of warming is not related to any Milankovitch cycles, but is instead the result of human-produced greenhouse gases in the atmosphere.



This particular study has a long history of its own. For more than three decades, researchers at&nbsp;<a href="https://www.colorado.edu/instaar/research/labs-groups/stable-isotope-lab">INSTAAR’s Stable Isotope Lab</a>&nbsp;at CU Boulder have been studying a variety of stable isotopes – non-radioactive forms of atoms with unique molecular signatures – found everywhere from inside ice cores and permafrost to the air in our atmosphere. Jones joined the lab in 2007 as a master’s student and has never left.



“I have this distinct memory of walking into my advisor, Jim White’s office in about 2013, and showing him that we would be able to pull out summer and winter values in this record for the last 11,000 years – which is extremely rare. In our understanding, no one had ever done this before,” said Jones. “We looked at each other and said, ‘Wow, this is going to be a really big deal.’”



It then took almost a decade to work out how to cope with problems such as diffusion, and how to interpret the data from ice cores drilled many years earlier.&nbsp;



The team’s next step is to attempt to interpret high-resolution ice cores in other places – such as the South Pole and in northeast Greenland, where cores have already been drilled –to understand our planet’s climate variability better.



“Humans have a fundamental curiosity about how the world works and what has happened in the past, because that can also inform our understanding of what could happen in the future,” said Jones.&nbsp;&nbsp;



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Tracking seasonal temperature changes over 11,000 years

Scientists have been drilling and removing ice cores in Antarctica...

According to a new study published in the <a href="http://dx.doi.org/10.1161/JAHA.122.026173">Journal of the American Heart Association</a>, teenagers who reported feeling optimism, self-esteem, happiness, belongingness, and feeling loved and wanted were more likely to have better <a href="https://www.earth.com/news/honey-can-improve-cardiometabolic-health/">cardiometabolic health</a> in their 20s and 30s compared to teens with fewer positive mental health assets. This association appeared stronger in the case of Black youth.&nbsp;&nbsp;



Although previous studies have found that psychological aspects of well-being, such as optimism and happiness, can positively influence cardiometabolic health, most of this research was conducted among older adults. By contrast, this new study focused on earlier life and took into consideration a broader measure of cardiometabolic health, including indicators of blood sugar levels and inflammation.



“We learned a lot in the last few decades about the impact of discrimination and other social risks youth of color face that may explain their elevated rates of cardiometabolic disease, however, much less attention is paid to the inherent strengths they possess and the ways those strengths may be leveraged to advance health equity,” said lead study author Farah Qureshi, an assistant professor of Social Epidemiology at the <a href="https://publichealth.jhu.edu/">Johns Hopkins Bloomberg School of Public Health</a>. “In this study, we wanted to shift the paradigm in public health beyond the traditional focus on deficits to one that concentrates on resource building.”&nbsp;



The scientists examined data related to health and well-being from nearly 3,500 U.S. teenagers from 1994 to 2018. Half of the participants were girls, 67 percent were white youth, 15 percent Blacks, 11 percent Latinos, and six percent Native American, Asian, or other. By using initial responses from when the participants were teenagers, the researchers identified five mental health assets related to better cardiometabolic health: optimism, happiness, self-esteem, a sense of belonging, and feeling loved. 



In addition, seven health measures aiming to examine cardiometabolic health were included and collected during clinical visits when participants were in their 20s and 30s: high-density lipoprotein (HDL), or “good” cholesterol, non-HDL cholesterol, systolic blood pressure, diastolic blood pressure, hemoglobin A1c (a measure of blood sugar), C-reactive protein (a measure of inflammation), and body mass index.



The analysis revealed that teens with four to five positive mental health assets were 69 percent more likely to maintain positive cardiometabolic health as young adults, and each additional asset conferred a 12 percent greater probability of positive cardiometabolic health. Although the assets were found to be protective across all racial and ethnic groups, the largest benefits were observed among Black youth, who also reported having more of these assets than participants from other groups.&nbsp;



However, racial disparities in cardiometabolic health were still apparent in adulthood. “These somewhat counterintuitive findings were surprising,” Qureshi said. “When we dug deeper, we found that the absence of psychological assets being was particularly health-damaging for Black youth. For Black youth – who face numerous barriers to achieving and sustaining optimal cardiometabolic health in adulthood – not having these additional mental health resources makes a big difference.”



“This work suggests that early investments in youth mental health may be a critical new frontier in the advancement of cardiometabolic health equity. We need more large-scale studies to monitor these and other positive mental health factors starting in childhood to understand how these assets may influence health and disease over the life course. This information may help us identify new ways to improve health and reduce disparities,” she concluded.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Feeling loved as a teen linked to healthier adulthood

According to a new study published in the Journal of...

After more than three years since its beginning, the <a href="https://www.earth.com/news/worlds-largest-covid-wave-currently-unfolding-across-china/">Covid-19</a> pandemic still wreaks havoc around the world, with increasingly more immune-evasive variants emerging in various countries. An aspect of SARS-CoV-2 that makes it so infectious and challenging to control is its ability to outwit the body’s innate, as well as acquired (through prior infection or vaccination) immune defenses.&nbsp;



Now, by using a groundbreaking technique known as serial femtosecond X-ray crystallography, a team of researchers led by the <a href="https://www.asu.edu/">Arizona State University</a> (ASU) has examined a viral protein called NendoU that appears to be responsible for the virus’s tactics of immune evasion.



“Our study focuses on how Covid-19 hides from the immune system using the NendoU protein,” said study lead author Rebecca Jernigan, a postdoctoral researcher in Biodesign at ASU. “As we better understand the structure and mechanics of NendoU, we have a better idea of how we can design antiviral drugs against it.”



Viruses have evolved a variety of complex strategies to evade the body’s defense mechanisms. In the case of SARS-CoV-2, the protein NendoU helps the virus hide from the immune system, in plain sight. Once a viral particle binds to a receptor on a cell’s surface, it inserts its genetic material into the cell, causing it to manufacture multiple copies of the viral genome that consists of RNA. When the viruses replicate within cells, their growing RNA structure produces a tail at the end, known as a poly-U tail.



Although human cells are equipped with fine-tuned sensors for detecting invading RNA viruses - because the poly-U tail gives away their identity as foreign invaders, allowing the immune system to attack them - SARS-CoV-2 is highly adept at using its NendoU protein to bind with, then cut-off the poly-U tail, and thus causing the virus to be less visible to the immune system.



The scientists discovered that the NendoU protein acts through a two-step process. First, its more rigid half binds to the active site of the substrate - in this case, a citrate molecule – while the flexible half also binds citrate (or the RNA), but less tightly. However, once the rigid half cleaves the RNA strand, it releases the strand, and becomes flexible. At the same time, the flexible half switches to a rigid state and the cycle is repeated. This scissor-like movement of NendoU’s two main components helps to erase the telltale signal of the virus’s presence within the cell, disabling an appropriate immune response.&nbsp;



“This work is so exciting as it shows for the first time that the differences in flexibility of the protein play an important role in the functional mechanism,” said senior author Petra Fromme, the director of the Biodesign Center for Applied Structural Discovery at ASU. “This will be critical for development of drugs against NendoU, with potential to reveal the presence of the virus to the immune system, which can then react and hinder serious infections.”



The study is published in the journal <a href="https://doi.org/10.1016/j.str.2022.12.009">Structure</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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How Covid-19 evades the immune system

After more than three years since its beginning, the Covid-19...

As global temperatures continue to rise, there is an urgent need to improve crop resilience and food security. A new study from the <a href="https://www.earlham.ac.uk/">Earlham Institute</a> has revealed that <a href="https://www.earth.com/news/climate-change-is-testing-the-resilience-of-wheat-yields/">wheat</a> containing exotic DNA from wild relatives can boost yields by more than 50 percent in hotter weather conditions.



"Wheat is among the most widely cultivated crops in the world with more than 216 million hectares grown annually, most of which is produced under temperate conditions," wrote the study authors.&nbsp;



"Heat stress is one of the major abiotic stressors that impacts global wheat production, reducing leaf area, crop duration and the efficiency of photosynthesis and respiration3 as well as reducing floret fertility and individual grain weight. Together, these physiological consequences negatively impact productivity with potential devastating effects."



"For example, in 2010, Russia saw a 30% reduction in wheat yield during their hottest summer in 130 years5. Cases like this could become commonplace as global warming causes temperatures to rise and extreme weather events to become more frequent."



Professor Anthony Hall noted that while wheat is responsible for around 20 percent of the calories consumed globally, it is uncertain whether the crops we are planting today will be able to cope with tomorrow's weather. “To make matters worse, developing new varieties can take a decade or more so acting quickly is vital.”



In collaboration with the International Maize and Wheat Improvement Centre (CIMMYT), the experts conducted a two-year field study in Mexico’s Sonora Desert to evaluate wheat crops under heat stressed conditions. The team analyzed 149 spring wheat lines, including widely-used elite varieties and those selectively bred to include DNA from wild relatives



“Crossing elite lines with exotic material has its challenges,” said study co-author Matthew Reynolds. “There’s a well-recognized risk of bringing in more undesirable than desirable traits, so this result represents a significant breakthrough in overcoming that barrier and the continued utilization of genetic resources to boost climate resilience.”



Ultimately, the researchers determined that plants bred with exotic DNA produced a 50-percent higher yield compared to wheat without this DNA. The experts also found that under normal conditions, exotic wheat lines did not perform any worse than elite lines.



“As we try to produce more food from less land to feed a growing global population, we urgently need to future-proof the crops we’re planting so they can thrive in an increasingly hostile climate," said study co-author Benedict Coombes. “The key to this, we are increasingly finding, may lie within largely untapped genetic resources from wheat’s wild relatives and landraces.”



“This is science we can now use to make an impact almost immediately,” said Professor Hall. “We’ve done the field trials, we know what genetic markers we’re looking for, and we’re starting conversations with wheat breeders so this is hopefully going to be the first of many steps to contribute to global food security in the coming years."



“The discoveries we’re making, and the action we’re taking, will hopefully mean people around the world can continue to have nutritious food on their plates.”



The research is published in the journal <a href="http://dx.doi.org/10.1038/s42003-022-04325-5">Communications Biology</a>.



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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



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Wheat with exotic DNA is much more heat tolerant

As global temperatures continue to rise, there is an urgent...

Scientists have long known that salt marshes are a major <a href="https://www.earth.com/news/how-will-earths-new-lakes-affect-the-carbon-budget/">carbon</a> sink and can be of critical help in carbon sequestration efforts. However, they are also highly dynamic ecosystems that constantly change with seasons and tides. By focusing on the Sage Lot Pond on Cape Cod, a new study led by the <a href="https://www.mbl.edu/research/research-centers/ecosystems-center">Marine Biological Laboratory (MBL) Ecosystems Center</a> has now investigated how seasonal cycles and the ocean dynamics affect the amount of carbon stored in New England marshes.



“In our recent study, we asked: how does marsh respiration (the conversion of organic carbon to carbon dioxide) vary as a function of temperature, both of air and sediment? This can help us understand how climate change, particularly warming, alters respiration rates in a marsh,” said study lead author Joanna Carrey, an associate professor of Environmental Science at <a href="https://www.babson.edu/">Babson College</a>, who conducted this research during a postdoctoral fellowship at MBL.&nbsp;



The scientists examined gas exchange from the Sage Lot Pond marsh system over 16 months between 2014 and 2016, by installing static gas chambers in six plots, ranging from high elevation marsh (which is flooded by tides just a few days per month) to low elevation marsh (flooded twice daily). The chambers were used to record the amount of carbon dioxide released in the atmosphere each second for four minutes straight.



The analysis revealed that each degree of warming correlated with an exponential increase in carbon dioxide emissions. “But what was surprising is that we found higher temperature sensitivity in the low marsh habitat. That means for each degree of warming, there was significantly more carbon dioxide released from the marsh at lower elevation relative to the high-marsh habitat,” Carey&nbsp;explained.



The fact that low marshes stored more carbon had seemed a beneficial thing for natural carbon sequestration, particularly since sea-level rise is resulting in the conversion of high-marsh to low-marsh environments. However, this study shows that, as the world continues to warm, these benefits may be diminished, since CO2 is also released there at a significantly higher rate with increasing temperatures.



In addition, the researchers found that the Sage Lot marsh environment loses much more respired carbon to the ocean via ebbing tides than it does directly through vertical fluxes to the air. Thus, although some of the respired carbon will be returned to the atmosphere as a CO2 flux from the sea, a part of it most likely remains dissolved in the ocean for an extended period – maybe even thousands of years – thereby enhancing the carbon sequestration value of salt marshes.



In future research, the scientists aim to study also nitrogen loads and emissions by using the same methods, as well as to examine how their findings might extend to other marshes.



The study is published in the journal <a href="https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2022JG006832">Journal of Geophysical Research: Biogeosciences</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Low marshes emit more CO2 as temperatures rise

Scientists have long known that salt marshes are a major...

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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

[sendtonews key="0ynNMYkMKa-2340414-12187" 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> (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



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Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" 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 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



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Detecting mercury contamination with the tap of a finger

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Kainji Lake, a reservoir on the Niger River.



In 1968, Kainji Lake was created by the construction of the Kainji Dam. The Niger River, the third longest in Africa, enters the lake in the north.&nbsp;



According to <a href="https://www.earth.com/news/rivers-in-the-american-west-are-a-lifesaving-resource-for-birds/">ESA</a>, the creation of the lake submerged Foge Island and the town of Bussa and permanently flooded other riverine settlements, leaving around 50,000 people displaced.&nbsp;



Large parts of Foge Island are temporarily exposed during low water tides, and the land is often used by migrating fishermen. Kainji Dam is a dam across the Niger River in Niger State of Central Nigeria. 



Wild mammals occur at relatively low densities due to illegal hunting. Lake Kainji has suffered a dramatic decline as a fishery due to the high numbers of artisanal and subsistence fisherfolk using the lake. It has been suggested that a period of closure, together with controlled fishing rights may help improve fish stocks.



Kainji Lake National Park is the oldest of its kind in Nigeria. The park contains three distinct areas: a part of the Kainji Lake, the Borgu Game Reserve to the west of the lake, and the Zugurma Game Reserve to the southeast. The park is home to around 65 mammal species, 350 bird species, and 30 species of reptiles and amphibians. 



Video/ Image Credit: European Space Agency&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.

Kainji Lake in north central Nigeria

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Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



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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.

Designing crops that can beat the heat

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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



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How does salt makes things taste better?

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Santiago, the capital city of Chile. The city is located in the center of the Santiago Metropolitan Region, which has a population of about eight million people.&nbsp;



'The weather of Santiago resembles the Mediterranean climate with dry and warm summers with temperatures reaching up to 35°C (from October to March) and cool and humid winters that can drop to 0°C (from April to September)."



"The city lies in the centre of the country’s central valley around 80 km from the Pacific Ocean to the west and borders Argentina to the east. A tiny part of Argentina is visible in the top-right corner of the image where the mountain crest of the Andes Mountains acts as a divider between the two countries," says ESA.



Video/ Image Credit: ESA



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



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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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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



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.

Remote sensing will revolutionize the way we monitor trees

[sendtonews key="EjmSP20gQK-2593093-12187" 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 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



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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



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The province of Zaragoza in northeast Spain

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> features a visual dataset of.methane emissions from wetlands across the globe. Atmospheric methane levels have reached record highs in recent years, and wetlands are a major source of these emissions.&nbsp;



"Methane is an important greenhouse gas that contributes substantially to global warming. On a molecule by molecule basis, methane is much more efficient at trapping heat than carbon dioxide, the main driver of warming," says NASA.



"Though human activities, including agriculture, oil and natural gas production and use, and waste disposal, collectively contribute the majority of methane to the atmosphere, about a third of total methane emissions comes from wetlands."&nbsp;



According to NASA, understanding methane emissions from wetlands and other natural sources is critically important for scientists and policymakers who are working to combat climate change by reducing emissions from human activities.



Video Credit: NASA Goddard



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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



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Wetlands are a major source of methane emissions

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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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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



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The Pyrenees Mountains in southwest Europe

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Today’s Video of the Day from <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes why experts are studying zebrafish to gain a better understanding of how the immune system responds to injury. Zebrafish have the ability to repair and regenerate organs.



“Organ regeneration offers an exciting opportunity for studying the immune system and to inquire why some species can regenerate organs like the heart or missing limbs while others like humans cannot,” explained Dr. Tatjana Piotrowski.



Zebrafish sensory organ hair cells are an ideal system to investigate the pathways and cell types involved in regeneration since they are easily destroyed with antibiotics and begin regenerating within five hours. This enabled the researchers to identify the exact timing and genetic programs for each anti-inflammatory macrophage activation state.&nbsp;



“Our hypothesis is that human macrophages do not receive the proper chemical activation 'cocktail' to instruct pro-regenerative processes,” said Dr. Nicolas Denans. “Identifying the molecular recipe of macrophage activation in zebrafish may one day enable us to design regenerative immunotherapies in humans.”&nbsp;&nbsp;&nbsp;



“The new evidence is a valuable resource for comparative studies on the genetic programs involved in macrophage-mediated repair and regeneration. In other words, different types of injuries may induce different kinds of inflammatory responses. We want to decipher whether this 'language' is universal or if there are a variety of dialects."



Video Credit: Stowers Institute for Medical Research&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



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How the immune system responds to injury

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes how record-breaking heat expressed itself around the world in 2022.



Scientists have determined that 2022 was the 5th warmest year since 1880. Furthermore, the last nine consecutive years have been the warmest on record.



From devastating floods and wildfires to natural disasters like Hurricane Ian, 2022 showed us yet again how a warming climate affects people across the globe.&nbsp;



"As we look back at 20:22 and years past, we see that each year we better understand the challenges we face and how important it is to meet them," says NASA.



Video/ Image Credit: NASA Goddard



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2022 illustrated the consequences of a warming climate

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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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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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Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...