Hair has a hidden job: helping your skin heal. Normally, skin stem cells focus on repairing wounds, while hair follicle stem cells focus on growing hair. 



But when the skin is injured - and the regular stem cells are damaged or depleted - the hair stem cells switch jobs. They stop making hair and start repairing the skin instead.



This surprising switch, discovered by scientists at <a href="https://www.rockefeller.edu/">Rockefeller University</a>, isn’t random. It’s driven by stress- and more specifically, a stress response that cells use to ration their energy in tough conditions.



<h2 class="wp-block-heading" id="h-stress-tells-cells-to-pivot">Stress tells cells to pivot</h2>



The researchers found that a signal called the “integrated stress response,” or ISR, tells <a href="https://www.earth.com/news/scientists-discover-hidden-stem-cells-that-could-reactivate-hair-growth/">hair follicle</a> stem cells when to pause hair growth and help repair the skin. This signal kicks in when the cells sense a shortage of a specific nutrient: serine.



Serine, a nonessential amino acid found in meat, grains, and milk, triggers the integrated stress response (ISR) when its levels drop - either due to dietary deficiency or because the body diverts it for other needs.



That causes the hair follicle stem cells (HFSCs) to pull back on hair production. If there's also a skin <a href="https://www.earth.com/news/stem-cells-can-delay-their-death-to-help-heal-injuries/">injury</a>, the ISR gets even stronger, pushing these cells fully into skin-repair mode.



“Serine deprivation triggers a highly sensitive cellular ‘dial’ that fine-tunes the cell’s fate - toward skin and away from hair,” says Jesse Novak, the study’s first author. “Our findings suggest that we might be able to speed up the healing of skin wounds by manipulating serine levels through diet or medications.”



<h2 class="wp-block-heading" id="h-wounds-recruit-hair-helpers">Wounds recruit hair helpers</h2>



<a href="https://www.earth.com/earthpedia-articles/what-are-stem-cells-2/">Stem cells</a> are the body’s utility players. They maintain tissues, grow new cells, and repair damage. But how they fuel themselves - especially when conditions change - hasn’t been fully understood.



The team at Rockefeller University studied how HFSCs behave when skin is injured to learn more.



“Most skin wounds that we get are from abrasions, which destroy the upper part of the skin," said Novak. "That area is home to a pool of stem cells that normally takes charge in wound repair. But when these cells are destroyed, it forces hair follicle stem cells to take the lead in repair.”



The researchers saw this as a perfect chance to track how <a href="https://www.earth.com/news/human-metabolism-has-evolved-to-become-energetically-unique/">metabolism</a> affects what stem cells do - and when.



<h2 class="wp-block-heading" id="h-starved-cells-pick-survival">Starved cells pick survival</h2>



Previous research from the same lab showed that precancerous skin cells rely heavily on serine. Taking serine out of the diet could slow or stop their growth. That got scientists wondering: What happens to normal cells if you take away serine?



To find out, they put HFSCs through a series of stress tests. In one set of experiments, mice were fed a diet without serine. In another, the scientists used genetic tools to stop stem cells from making serine on their own.



The results were clear in both cases: when serine is low, the ISR tells HFSCs to put hair growth on hold. The body shifts its priorities.



Then they added another challenge - wounding the skin. The stress response got even stronger. Hair production slowed further, and healing sped up. The ISR seemed to be acting like a control tower, directing traffic during a crisis.



“No one likes to lose hair, but when it comes down to survival in stressful times, repairing the epidermis takes precedence,” said Elaine Fuchs, head of the lab. “A missing patch of hair isn’t a threat to an animal, but an unhealed <a href="https://www.earth.com/news/common-protein-in-milk-could-revolutionize-wound-healing/">wound</a> is.”



<h2 class="wp-block-heading" id="h-what-about-boosting-hair-growth">What about boosting hair growth?</h2>



If cutting back on serine slows hair growth, could a high-serine diet do the opposite? Not really. 



The researchers tried feeding mice six times the normal amount of serine. Their bodies barely noticed - serine levels only increased by about 50 percent. The body seems to regulate it tightly.



Still, there was a small win. “We did see that if we prevented a stem cell from making its own serine and replenished its losses through a high-serine diet, we were able to partially rescue hair regeneration,” Novak said.



<h2 class="wp-block-heading" id="h-what-s-next-for-stem-cell-research">What's next for stem cell research</h2>



The team now wants to explore whether reducing dietary serine or changing ISR activity through medications could help wounds heal faster. They’re also curious if other amino acids might have similar effects.



“Overall, the ability of stem cells to make cell fate decisions based upon the levels of <a href="https://www.earth.com/news/stress-eats-away-our-brains-cognitive-defenses/">stress</a> they experience is likely to have broad implications for how tissues optimize their regenerative capacities in times where resources are scarce,” said Fuchs.



In other words, your cells know when to prioritize survival over style. When food is low and the skin is hurt, hair can wait.



The full study was published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S1550413125002669?via%3Dihub">Cell Metabolism</a>.



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Stem cells can shift from hair growth to skin healing

Hair has a hidden job: helping your skin heal. Normally, skin stem cells focus on repairing wounds, while hair follicle stem cells focus on growing hair. But when the skin is injured - and the regular stem cells are damaged or depleted - the hair stem cells switch jobs. They stop making hair and start repairing the skin instead. This surprising switch, discovered by scientists at Rockefeller University, isn’t random. It’s driven by stress- and more specifically, a stress response that cells use to ration their energy...

To cut carbon emissions, large shipping vessels could be retrofitted with sails so that they can be powered by wind.&nbsp;



A new initiative from the University of Southampton will investigate how modern vessels perform on the ocean when fitted with wing-sails. The experts seek to explore the potential of the technology to decarbonize the UK’s maritime sector.



Lead scientist Dr. Joseph Banks said that global shipping, a large source of emissions, needs to be decarbonized quickly.



“Ships powered by wind is obviously nothing new – but almost every large vessel operating today is powered by fossil fuels, leaving a lasting mark on the environment. While new wind-assist technologies are being developed, many are not ready for market and their predicted fuel savings have not been independently verified at sea, which is why UK-funded research projects like this are so important," said Dr. Banks.&nbsp;



The grants for the Winds of Change project were provided by the Department for Transport and Innovate UK, which is working to transform the UK into a world-leader for clean maritime equipment.



Scientists will test the impact of a retractable 20 meter-high FastRig wing-sail retrofitted on the commercial ship the Pacific Grebe – a 105 meter vessel.



“This is an innovative project because the technology can be retrofitted to pre-existing vessels to quickly reduce emissions from the existing ships and help create quieter, emission-free ships in the future that do no harm to ocean environments and improve air quality in ports towns and cities," said Dr. Banks.&nbsp;



“Our team of researchers will investigate the complex interactions between the wing-sails and the ship hydrodynamics enabling accurate predictions of vessel performance which will be compared to the demonstration vessel Pacific Grebe as part of the project."



Wind power is the fastest way for the sector to reduce emissions. The team hopes their new tool, which predicts the fuel savings delivered by the wing-sails, will drive further investment in marine technology and promote the exciting field of Maritime Engineering.&nbsp;



To learn more about this new research, visit <a href="http://www.southampton.ac.uk/smmi">www.southampton.ac.uk/smmi</a>.



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By <a href="mailto:katherinebucko@gmail.com">Katherine Bucko</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Wind could be used to power cargo ships

To cut carbon emissions, large shipping vessels could be retrofitted...

During the Covid-19 pandemic, doctors noticed that children were less affected by the virus than adults and seniors. Researchers with <a href="https://ki.se/en">Karolinska Institutet</a>, the Universities of Bern (Switzerland), Oslo (Norway), and Linköping University (Sweden) have discovered that this phenomenon may be partially explained by children's exposure to the common cold, which produces memory T-cells that could help fight the COVID-19 virus.&nbsp;



To conduct their study, the scientists collected 48 blood samples from children between 2 and 6 years old and 94 samples from adults between 26 and 83 years old. They also included 59 samples from people who had recently recuperated from COVID-19.



Study co-author Annika Karlsson led the research at the Department of Laboratory Medicine, Karolinska Institutet. She explained why children have more immunity than adults and how their findings are important for future epidemiology research.



“These reactions are especially strong early in life and grow much weaker as we get older. Our findings show how the T-cell response develops and changes over time and can guide the future monitoring and development of vaccines," said Karlsson.



According to the analysis, children as young as two years old seemed to benefit from this immunity. Still, more research is needed to understand how our immune response changes as we get older.



“Next, we’d like to do analogous studies of younger and older children, teenagers and young adults to better track how the immune response to coronaviruses develops from childhood to adulthood,” said study co-first author Marion Humbert.



The study was supported by the Swedish Research Council, Region Stockholm (CIMED), Karolinska Institutet, the Knut and Alice Wallenberg Foundation, and the European Research Council.



The research is published in the journal <a href="https://www.pnas.org/doi/10.1073/pnas.2220320120">Proceedings of the National Academy of Sciences</a>.



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By <a href="mailto:nire518@gmail.com">Erin Moody</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Common cold helped protect children from COVID-19

During the Covid-19 pandemic, doctors noticed that children were less...

A new study from the <a href="https://vet.tufts.edu/">Cummings School of Veterinary Medicine</a> has revealed that the deaths of hundreds of seals in New England were caused by bird flu. The research is the first to link a large scale mortality event in wild mammals to avian influenza.&nbsp;



In the summer of 2022, more than 330 New England harbor and gray seals died along the North Atlantic coast. The researchers have connected this shocking event to an outbreak of avian influenza (HPAI) in the region.



The Tufts Wildlife Clinic has been conducting avian influenza surveillance since January 2022, which is shortly after the H5N1 strain arrived from Europe. The testing has revealed that at least three strains of avian influenza have crossed the Atlantic, and there have been consistent waves of bird infections.



In collaboration with NOAA’s Greater Atlantic Region Marine Mammal Stranding Network, the team also tested seals for bird flu.&nbsp;



“We have a better resolution and greater depth of detail on this virus than before because we were able to sequence it and detect changes almost in real time,” said study co-first author Wendy Puryear. “And we have pairings of samples, sometimes literally from a bird and a seal on the same beach.”



“Because of the genetic data that we gathered, we were the first to see a strain of the virus that's unique to New England. The data set will allow us to more meaningfully address questions of which animals are passing the virus to which animals and how the virus is changing,” said co-first author Kaitlin Sawatzki.



Domestic poultry and seabirds are highly susceptible to the H5N1 strain of bird flu. This particular strain is responsible for about 60 million poultry deaths in the U.S. since October 2020.&nbsp;



The experts determined that at the time of the seal mortality event in New England, seagulls were getting hit hard by the H5N1 virus. There are lots of ways gulls and other birds may transmit the virus to seals, and not just through direct contact, noted the researchers.



The highly pathogenic H5N1 is associated with a death rate of nearly 100 percent among domestic and wild birds, and the Tufts research indicates that there is a similar fatality rate for wild mammals. According to the study authors, none of the stranded seals that tested positive for bird flu recovered.



“It's not surprising that you might have transmission between the seals, because it has happened with low pathogenic avian influenza,” said Puryear. “However, we can't say definitively whether or not there has been mammal-to-mammal transmission of HPAI.”



“To get strong evidence of mammal-to-mammal transmission, you need two things: lots of infected animals and time,” explained Sawatzki. “Time for the virus to mutate, and time for the mutated virus to be transmitted to another seal."



"As the virus acquires mutations, we can see shared mutations in the sequences that are specific only to mammals and that haven’t been seen in a bird before. We had the numbers, but this outbreak didn't last long enough to provide evidence for seal-to-seal transmission.”



The team found evidence that the virus had mutated during the mortality event, but there has not been a case of bird flu in seals along the Atlantic coast since the end of summer 2022.



The CDC reports that the risk to the public remains low, with less than 10 human cases of H5N1. In these cases, the individuals had direct contact with infected poultry.



The ultimate public health threat associated with bird flu, however, is not yet known. According to the World Health Organization, 868 cases of human infection with H5N1 have been reported worldwide since 2003, and the fatality rate was over 50 percent.



The study is published in the journal <a href="http://dx.doi.org/10.3201/eid2904.221538">Emerging Infectious Diseases</a>.



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Bird flu killed hundreds of seals in New England last year

A new study from the Cummings School of Veterinary Medicine...

In recent years, an increasing number of smartphone spyware apps have been developed. Between September 2020 and May 2021, the use of such apps increased by 63 percent in the U.S. and 93 percent in the UK, posing significant <a href="https://www.earth.com/news/wireless-security-cameras-have-unexpected-privacy-risks/">privacy risks</a>.&nbsp;



While publicly marketed as tools for monitoring underage children or employees, these apps – which are hard to notice or detect and will easily leak the sensitive personal information they collect - are also frequently used by people to covertly spy on a spouse, partner, or other individuals.&nbsp;



Spyware apps are rather cheap (with a monthly fee ranging between $30 and $100), require little to no technical expertise to install and use, only need temporary access to their victims’ devices, and can easily record these devices’ activities – such as text messages, emails, photos, or voice calls – and allow abusers to remotely review this information through a web portal.



Now, a team of scientists from the <a href="https://ucsd.edu/">University of California, San Diego</a> and <a href="https://www.nyu.edu/">New York University</a> (NYU) has performed an in-depth technical analysis of 14 leading spyware apps for Android phones, which – by contrast to iPhones - commonly allow such invasive apps to be downloaded from the internet.&nbsp;



The analysis revealed that these apps use a wide range of techniques to surreptitiously gather data (such as invisible browsers), can record phone calls via the device’s microphone, can exploit accessibility features on smartphones allowing them to record keystrokes, and can masquerade as “Wi-Fi” or “Internet Service.”



Moreover, since spyware apps often use unencrypted communication channels to transmit the data they collect and store it in public URLs accessible to anyone with a link, their protection of sensitive user data is minimal.



According to the researchers, in order to counter spyware, a more creative, diverse, and comprehensive set of interventions from the industry, government, and the scientific community is urgently needed.&nbsp;



“Our recommendation is that Android should enforce stricter requirements on what apps can hide icons. Most apps that run on Android phones should be required to have an icon that would appear in the launch bar. We recommend that all actions to access sensitive data be added to the privacy dashboard and that users should be periodically notified of the existence of apps with an excessive number of permissions,” the authors wrote.



“While technical defenses can be part of the solution, the problem scope is much bigger. A broader range of measures should be considered, including payment interventions from companies such as Visa and Paypal, regular crackdowns from the government, and further law enforcement action may also be necessary to prevent surveillance from becoming a consumer commodity,” they concluded.



The study – which will be presented this summer at the <a href="https://petsymposium.org/">Privacy Enhancing Technologies Symposium</a> in Zurich, Switzerland - can be found <a href="https://www.sysnet.ucsd.edu/~voelker/pubs/spyware-pets23.pdf">here</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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Is your smartphone spying on you?

In recent years, an increasing number of smartphone spyware apps...

In a study led by the <a href="https://www.uq.edu.au/">University of Queensland</a>, scientists have investigated the genome of the Australian black swan to examine its susceptibility to infectious <a href="https://www.earth.com/news/why-rodent-borne-diseases-spill-over-into-humans/">diseases</a>. The researchers found that black swans lack some of the immune-related genes that are needed to fight off bird flu and other viral illnesses.&nbsp;



"The Australian black swan (Cygnus atratus) is an iconic species with contrasting plumage to that of the closely related northern hemisphere white swans," wrote the study authors.



"The relative geographic isolation of the black swan may have resulted in a limited immune repertoire and increased susceptibility to infectious diseases, notably infectious diseases from which Australia has been largely shielded."



"Unlike mallard ducks and the mute swan (Cygnus olor), the black swan is extremely sensitive to highly pathogenic avian influenza."



Study co-author Dr. Kirsty Short noted that black swans can die from the avian flu HPAI within three days.



“Our data suggests that the immune system of the black swan is such that, should any avian viral infection become established in its native habitat, their survival would be in peril," explained Dr. Short.



“We currently don’t have HPAI in Australia, but it has spread from Asia to North America, Europe, North Africa and South America."



When the bird flu was introduced to new locations, such as Chile and Peru, it killed thousands of wild seabirds, noted Dr. Short. “The risk to one of Australia’s most unique and beautiful birds is very real, and we need to be prepared if we hope to protect it.”



The researchers hope their findings will be able to better protect not only the black swan, but also other susceptible species across the globe.



“We want to increase awareness about how vulnerable Australia’s bird species are to avian influenza and the highly precarious situation they are in,” said Dr.&nbsp; Short.



The research was funded by the Australian Department of Agriculture and Water Resources and an Australian Research Council Discovery Early Career Researcher Award.



The study is published in the journal <a href="http://dx.doi.org/10.1186/s13059-022-02838-0">Genome 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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Black swans do not have the genes to survive bird flu

In a study led by the University of Queensland, scientists...

South Col - a windswept, snow-free rocky dip located five miles above sea level in the Himalayan Mountains between Mount Everest and its sister peak Lhotse – is the place where hundreds of adventurers camp each year before attempting to climb the world’s largest peak from the southeastern side.&nbsp;



According to a team of scientists led by the <a href="https://www.colorado.edu/">University of Colorado Boulder</a>, they are also leaving behind a frozen legacy of highly resistant <a href="https://www.earth.com/news/how-can-deep-ocean-microbes-survive-without-sunlight/">microbes</a> that can survive harsh conditions at high elevations and lie dormant in the soil for decades or even centuries. While highlighting the invisible impact of tourism on the world’s highest mountains, these findings also provide a better understanding of the environmental limits to life on our planet, as well as in other places in the universe where life may exist.&nbsp;



The scientists collected soil samples from South Col and analyzed them in several labs at CU Boulder by using both traditional culturing techniques and next-generation gene sequencing methods, in order to determine the diversity of microorganisms found in the samples.&nbsp;



The analyses revealed that most of the microbial DNA sequences were similar to hardy, or “extremophilic” organisms previously detected in other high-elevation sites in the Antarctica or the Andes, with the most abundant organism being a fungus in the genus Naganishia, which is known to be able to withstand extremely high levels of cold and ultraviolet radiation.&nbsp;



Surprisingly though, the experts also found microbial DNA of some organisms heavily associated with humans such as Staphylococcus, one of the most widespread skin and nose bacteria, and&nbsp;Streptococcus, a type of microbe usually infecting the human mouth. While the researchers were not surprised that humans left behind microorganisms – since microbes are nearly everywhere and can easily move around through the air at significant distances from camps or trails – they were nevertheless impressed by the fact that certain microbes which have evolved to thrive in warm and wet environments such as our noses and mouths are resilient enough to survive in a dormant state in the extremely harsh conditions from South Col.&nbsp;



Although the impact of these microbes on the Himalayan environment is expected to be minimal, their presence there raises alarm for humans’ possible impact on extraterrestrial worlds that we may one day be able to travel to. “We might find life on other planets and cold moons. We’ll have to be careful to make sure we’re not contaminating them with our own,” concluded senior author Steven Schmid, a professor of Ecology and Evolutionary Biology at CU Boulder.



The study is published in the journal <a href="https://doi.org/10.1080/15230430.2023.2164999">Arctic, Antarctic, and Alpine Research</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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Humans are leaving behind microbes on Mount Everest

South Col - a windswept, snow-free rocky dip located five...

The <a href="https://www.earth.com/news/our-gut-microbiome-is-shaped-by-what-we-eat/">gut</a> is home to a vast array of microorganims that can influence both health and disease. While some of them are known to contribute to the development of inflammatory conditions, such as the inflammatory bowel disease (IBD), the precise sequence of events that lead from these microbes to immune cells to disease remains a mystery.&nbsp;



Now, a team of researchers led by the <a href="https://brighamandwomens.org/">Brigham and Women’s Hospital</a> (BWH) has explored what drives the generation of Th17 (Interleukin-17-producing T helper) cells – a type of cells which, on the one hand, play a crucial role by helping to build a protective barrier in the gut that, when encountering a bacterial or fungal infection, releases signals causing the body to produce more Th17 cells, but on the other hand, are also implicated in diseases such as multiple sclerosis, rheumatoid arthritis, and IBD. The scientists were surprised to discover that the purine metabolite xanthine, which is found in coffee, tea, and chocolate, may have a fundamental role in Th17 differentiation.



“One of the concepts in our field is that microbes are required for Th17 cell differentiation, but our study suggests that there may be exceptions,” said co-lead auhor Jinzhi Duan, an expert in Gastroenterology, Hepatology, and Endoscopy at BWH. “We studied the underlying mechanisms of Th17 cell generation in the gut and found some surprising results that may help us to better understand how and why diseases like IBD may develop.”



“Sometimes in research, we make these serendipitous discoveries—it’s not necessarily something you sought out, but it’s an interesting finding that opens up further areas of inquiry,” added senior author Richard Blumberg, a gastroenterologist at the same institution. “It’s too soon to speculate on whether the amount of xanthine in a cup of coffee leads to helpful or harmful effects in a person’s gut, but it gives us interesting leads to follow up on as we pursue ways to generate a protective response and stronger barrier in the intestine.”



By using several mouse models to examine the molecular events which trigger the development of Th17 cells, the researchers were surprised to find that Th17 cells could proliferate even in germ-free mice, with endoplasmic reticulum stress in intestinal epithelial cells driving Th17 cell differentiation through purine metabolites like xanthine, even in animals which did not carry microbes. Moreover, these cells’ genetic signatures suggested they might have protective properties.



Since this study was limited to cells in the intestine, further research is needed to examine the relation between these cells and other organs, such as the skin or the lungs, which may have a critical influence on disease outcomes. More investigations are also necessary to determine what causes Th17 cells to sometimes become pathogenic.



“While we don’t yet know what’s causing pathogenesis, the tools we have developed here may take us a step closer to understanding what causes disease and what could help resolve or prevent it,” Blumberg concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1016/j.immuni.2023.02.018">Immunity</a>.&nbsp;



—



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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Coffee component may play a key role in gut health

The gut is home to a vast array of microorganims...

Each year, millions of tourists travel to Tokyo and other cities in Japan to experience the country’s world-famous <a href="https://www.earth.com/news/cherry-blossom-emblems-could-unite-people-to-save-forests/">cherry blossom</a> season (known as the “sakura season”). The cherry trees usually start to blossom at the end of March or the beginning of April, but in recent years this event is starting earlier due to unusually warm weather fueled by climate change.&nbsp;



This year, by beginning 10 days early, cherry blossom season matched a record seen only twice before - in 2020 and 2021 - since data first began being collected in 1953.



Since late 2019, Japan’s borders were closed and large gatherings were mostly forbidden due to the Covid-19 pandemic. For these reasons, the highly anticipated viewing parties of this spectacular event (known as “hanami”), usually bringing together huge crowds of people in Japan’s public parks, did not take place. However, as the borders reopened in last October and Covid-19 restrictions have gradually been lifted, both locals and visitors have eagerly expected this year’s season.



According to the <a href="https://www.jma.go.jp/jma/indexe.html">Japan Meteorological Agency</a>, over five blossoms of the famous Somei-Yoshino cherry trees – a strain which accounts for over 90 percent of the cherry trees planted in Japan - were recently seen at the Yasukuni Shrine in Tokyo, after temperatures have been gradually rising since the beginning of March. The blossoms all over the city are expected to be in full-bloom within the next week.



“Today, on March 14, we hereby declare the sakura blossoming in Tokyo,” said an official from the agency in an announcement that came six days earlier than last year. “We’ve seen many warm days in March. Climate change may also have played a part.”



If global temperatures continue to rise, extremely early cherry blossom flowering dates could occur more regularly, according to a study published in 2022 in the journal <a href="https://iopscience.iop.org/article/10.1088/1748-9326/ac6bb4">Environmental Research Letters</a>. “By the end of the century and under medium emissions, the early shift is estimated to further increase by almost a week. Extremely early flowering dates, as in 2021, would be rare without human influence, but are now estimated to be 15 times more likely, and are expected to occur at least once a century. Such events are projected to occur every few years by 2100 when they would no longer be considered extreme,” the authors concluded.



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Cherry blossom season has arrived 10 days early in Japan

Each year, millions of tourists travel to Tokyo and other...

Much previous research has shown evidence linking childhood obesity to increased risk of hypertension (high blood pressure), particularly for children who are obese. U.S. data indicate that overweight children are 1.54 times as likely to have elevated blood pressure as children of average weight. For obese children, this prevalence ratio is 3.05 times.



However, the definition of what is normal weight for children is fairly broad. No information exists about the risks of hypertension for children whose body mass index (BMI) is on the high side of normal, but who are not defined as being overweight. Furthermore, there is no understanding of whether a child’s risk of hypertension changes if he or she gains extra weight (in addition to average expected increase) during childhood. A new study of over 800,000 youth between the ages of 3 and 17 has now addressed these gaps in knowledge.



The study looked retrospectively at the electronic health records of 801,019 young people who were members of <a href="https://healthy.kaiserpermanente.org/">Kaiser Permanente</a> in Southern California between 2008 and 2015. The researchers considered the initial BMI and blood pressure of youths when they first joined the study, and monitored changes in these two variables during the 5-year follow-up period. They divided normal body weight into low (5th-39th percentiles), medium (40th-59th percentiles), and high (60th-84th percentiles) to provide insight into the risk of hypertension at a range of “normal” weights below the threshold for overweight.&nbsp;



The results of the analysis show that, in this cohort study of youths, high normal body weight (above the 60th percentile of BMI for age) was associated with increased risk of hypertension. In addition, extra weight gain was associated with further increases in hypertension risk. These findings are published in JAMA Network Open, and reveal the following:&nbsp;



<ul>
<li>Compared to youths in the medium range of average weight, the risk of developing hypertension within five years was 26 percent higher for youths at the high end of the average weight range.</li>



<li>Children gain weight over time. Every BMI unit gained per year increases their risk of hypertension by 4 percent.</li>



<li>The rate of hypertension was higher among boys than girls, and among youth on state-subsidized health plans in comparison to those not on state-subsidized health plans.</li>
</ul>



“Hypertension during youth tracks into adulthood and is associated with cardiac and vascular organ damage. Since the organ damage can be irreversible, preventing hypertension in our young people is critically important,” said study lead author Dr.&nbsp;<a href="https://www.kp-scalresearch.org/investigator/corinna-koebnick-phd-msc/">Corinna Koebnick</a> of the Kaiser Permanente Southern California Department of Research &amp; Evaluation. “The findings of this study of hypertension among a diverse population of children in Southern California show us the detrimental effects of even a few extra pounds on our young people.”



“This study underscores the need for medical professionals to re-evaluate how we correlate and educate about health risks across the spectrum of weight in growing children,” said study senior author Dr.&nbsp;<a href="https://healthy.kaiserpermanente.org/southern-california/physicians/poornima-kunani-2148147">Poornima Kunani</a>, a pediatrician and researcher at the <a href="https://healthy.kaiserpermanente.org/">Kaiser Permanente</a> Manhattan Beach Medical Office. “Obesity may be the most important risk factor for hypertension during childhood. Parents should talk to their pediatrician to see if their child might be at risk for hypertension and other preventable chronic medical conditions related to obesity. They can help you with strategies for developing habits to keep your child healthy through adulthood.”



—



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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Just a few extra pounds increases hypertension risk in kids 

Much previous research has shown evidence linking childhood obesity to...

In a new study from <a href="https://wsu.edu/">Washington State University</a>, experts have found that strong winds can increase the spread of pathogens at outdoor chicken farms. The research was focused on the prevalence of Campylobacter - the most common bacterial cause of foodborne illness - at chicken farms in the western United States.



Across farms that had experienced high winds the week before the samples were collected, the pathogen was found to be more widespread.&nbsp;



“Farmers need to be aware of the risk,” said study co-lead author Olivia Smith. “These environmental factors are influencing if the poultry are going to have foodborne pathogens, so farmers need to be aware of what's around them. If there's a lot of wind and if they're in really agricultural areas, that's a problem.”



For the investigation, the researchers collected samples of chicken feces at 27 farms in California, Oregon, Washington and Idaho. On most of the farms, samples were taken once a year for three years.&nbsp;



Overall, more than 85 percent of the farms had some instance of Campylobacter during the study period.&nbsp;



"We found that 26.0% of individual chicken fecal samples we tested were positive for Campylobacter spp.," wrote the study authors. "Our analyses suggest that Campylobacter spp. prevalence increases in poultry on farms with higher average wind speeds in the seven days preceding sampling; on farms embedded in more agricultural landscapes; and in flocks typified by younger birds, more rotations, higher flock densities, and the production of broilers."



Study senior author Jeb Owen, a WSU entomologist, said that farmers should set up a professional relationship with a veterinarian to get their flocks checked and monitored on a regular basis. “Whether for productivity or for animal welfare, you don't want your animals to be sick.”



The study is published in the journal <a href="http://dx.doi.org/10.3390/ani13030492">Animals</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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Strong winds help pathogens spread on poultry farms

In a new study from Washington State University, experts have...

Moon,Surface,With,Dark,Side.,Earth,On,Background.,Elements,Of

Scientists at the U.S. Department of Energy’s (DOE) <a href="https://www.bnl.gov/">Brookhaven National Laboratory</a> are attempting to design and land a radio telescope on the dark side moon in the hopes of being the first to begin the exploration of the Dark Ages of the universe.



The Dark Ages started approximately 380,000 years after the Big Bang when no stars or planets existed. Radio waves on the moon’s dark side could give us insight into this mysterious period.



“Modeling the universe is easier before stars have formed. We can calculate almost everything exactly,” explained Brookhaven physicist Anže Slosar. “So far, we can only make predictions about earlier stages of the universe using a benchmark called the cosmic microwave background. The Dark Ages Signal would provide a new benchmark.”



The new project, the Lunar Surface Electromagnetics Experiment-Night (LuSEE-Night), seeks to move beyond predictions by accessing the Dark Ages Signal for the first time.&nbsp;



The task is not simple due to environmental conditions. The dark side is in total darkness for 14 Earth days, followed by intense sunlight. This dramatic change means the area can go from -280 to 250 degrees Fahrenheit. Building a telescope that can sustain these temperature fluctuations presents many challenges.



“The moon is easier to reach than Mars, but everything else is more challenging,” said Paul O’Connor, a senior scientist in Brookhaven’s Instrumentation Division and LuSEE-Night Project Instrument Scientist. “There's a reason only one robotic rover has landed on the Moon in the last 50 years, while six went to Mars, which is 100 times farther away. It’s a vacuum environment, which makes removing heat difficult, and there’s a bunch of radiation."



Despite these challenges, the Brookhaven team feels confident that they can build a capable telescope.



“LuSEE-Night is not a standard radio telescope,” said Slosar. “The spectrometer is at the heart of it. Like a radio tuner, it can separate out radio frequencies. That’s where our expertise gives us a starting point. Even though nobody has built an instrument like this before, we know how to build the most crucial component - a very sensitive spectrometer.”



The LuSEE-Night’s primary goal is to test whether radio cosmology experiments are possible on the moon’s far side. The team is also designing the telescope to collect data for two years in the hopes that it will uncover some of our universe’s darkest mysteries.&nbsp;&nbsp;



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By <a href="mailto:nire518@gmail.com">Erin Moody</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer



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Lunar telescope may explore the Dark Ages of our universe 

Scientists at the U.S. Department of Energy’s (DOE) Brookhaven National...

Two types of <a href="https://www.earth.com/news/climate-impact-labeling-has-a-strong-influence-on-food-selection/">climate</a> events are steadily reshaping Earth's climate and ecosystems. "Pulses" are short-term climate events such as shifting ocean currents, while "presses" are prolonged events like heat waves.&nbsp;



In a recent study from the <a href="https://www.washington.edu/">University of Washington</a>, researchers set out to investigate how different presses and pulses have impacted Magellanic penguins. The experts studied the effects of climate events on these migratory marine predators at a large breeding site in Punta Tombo, Argentina. 



The study showed that pulses and presses are affecting Magellanic penguins in different ways, yet are equally important for the survival of the species. The researchers also determined that the combination of these two types of climate events has taken a major toll on the size of the penguin population at Punta Tombo.



“We found that penguin survival doesn’t rest solely - or even largely - on one or a few climate effects,” explained study lead author T.J. Clark-Wolf. “Instead, many different presses and pulses impact penguin reproduction and survival over time.”



The research was focused on data collected at Punta Tombo from 1982 to 2019 by study co-author Dee Boersma. The information included details on reproductive success for nearly 54,000 penguins at the site, climate conditions during each breeding season, and ocean conditions off the coast of Punta Tombo.



The experts integrated the data into a population model that provided details of the effects of separate climate events. The model showed that each type of climate event had distinct effects on the penguin population at Punta Tombo.



Heat waves have been perhaps the most detrimental of the various climate presses and pulses, killing both adults and chicks. In 2019, for example, a single-day heat wave killed more than 350 penguins at the site.



According to the experts, the number of breeding pairs at Punta Tombo dropped from about 400,000 in the 1980s to about 150,000 in 2019.



“This colony will be 100 years old in 2024, but we finished another on-the-ground survey in late October at Punta Tombo and its numbers continue to decline,” said Boersma. “The penguins are instead moving north to be closer to their food.”



The researchers noted that understanding how these presses and pulses shape this population is crucial for informing conservation efforts.



“For conservation to be most effective, we need to know where, when and how to apply our limited resources,” said senior author Briana Abrahms. “Information generated by this study tells us which climate effects we need to worry about and which ones we don’t - and therefore can help us focus on measures that we know will have a positive impact.”



The study is published in the journal <a href="https://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.&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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Climate events have taken a toll on Magellanic penguins

Two types of climate events are steadily reshaping Earth's climate...

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



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https://youtu.be/Ug657J67iEo?si=w96YjGMsg939LD_3
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Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.



"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.



"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.



"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.



To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.



Video/ Image Credit: American Chemical Society&nbsp;



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



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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



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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



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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

[sendtonews key="JRaP49ISmm-2357509-12187" type="single"] Today’s Video of the Day from the...

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



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Interactive map of the universe includes 200,000 galaxies

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

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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



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Remote sensing will revolutionize the way we monitor trees

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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



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

The province of Zaragoza in northeast Spain

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Today's Video of the Day from <a href="https://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



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.

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



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

The rapid retreat of the Columbia Glacier

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

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the Pyrenees Mountains, which form a natural boundary between France and Spain in southwest Europe.



The mountain range is 430 kilometers in length. It stretches from the Mediterranean Sea on the east to the Atlantic Ocean on the west.



At an elevation of 3404 meters, Pico de Aneto is the highest mountain peak in the Pyrenees, and the third-highest peak in Spain. Pico de Aneto is located in the Posets-Maladeta Natural Park, which spans more than 82,000 acres.&nbsp;



"Geological studies have revealed that the Pyrenees Mountains have been around for longer than the Alps, with their sediments first deposited in coastal basins during the Paleozoic and Mesozoic eras," reports ESA.



"The entire mountain range formed due to the upwelling of large sedimentary rocks by the collision of the Iberian and the Eurasian plate around 100 to 150 million years ago, followed by intense erosion from ice and water."



The western Pyrenees receive more precipitation due to moisture blowing in from the Atlantic Ocean. The mountain range contains many lakes, several small glaciers, and some of the highest waterfalls in Europe.



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"] Today’s Video of the Day from the...

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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



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

How 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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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.

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



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

Two distant planets may be "water worlds"

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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