While space is often thought of as a quiet, eerie place of stillness, a dramatic saga is unfolding on the outskirts of our Milky Way galaxy. NASA’s Hubble Space Telescope is serving as an eyewitness to this interstellar drama.



The protagonist of this tale? None other than the Large Magellanic Cloud (LMC), one of our closest galactic neighbors.



<h2 class="wp-block-heading" id="h-a-brush-with-the-milky-way">A brush with the Milky Way</h2>



Even though it is classified as a dwarf <a href="https://www.earth.com/news/runaway-star-j1249-36-spotted-trying-to-escape-our-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">galaxy</a>, the LMC steals the show on the canvas of the southern night sky, where it displays its majestic halo at an impressive 20 times the size of the full moon's diameter.



Some astrophysicists propose that the LMC isn't orbiting around our galaxy. but is rather simply on a drive-by through our cosmic neighborhood.



These same scientists believe that the LMC has recently completed its tightest brush with the Milky Way. This intimate rendezvous has whipped away much of the gaseous <a href="https://www.earth.com/news/breathtaking-photo-shows-an-ice-halo-forming-around-the-sun/" target="_blank" rel="noreferrer noopener">halo</a> that the LMC once wore with pride.



<h2 class="wp-block-heading" id="h-measuring-the-lmc-s-halo">Measuring the LMC's halo</h2>



In a significant milestone, astronomers have managed to measure this halo for the first time based on observations from Hubble.



The findings, which are slated for publication in The Astrophysical Journal Letters, unveil the LMC's halo as surprisingly small - a mere 50,000 light-years across.



This makes it about ten times smaller than the halos of other galaxies of a similar mass. The compactness of this halo is a silent reflection of the LMC’s recent encounter with the Milky Way.



"The LMC is a survivor. Even though it's lost a lot of its gas, it's got enough left to keep forming new <a href="https://www.earth.com/news/uma3-u1-faintest-star-system-found-orbiting-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">stars</a>," explained Andrew Fox, the principal investigator from the European Space Agency in Baltimore, based out of the revered AURA/STScI.



Fox notes that smaller galaxies wouldn't fare as well as the LMC. Without gas, they would just be clusters of aging red stars.



<h2 class="wp-block-heading" id="h-the-milky-way-s-giant-hair-dryer">The Milky Way's "giant hair dryer"</h2>



Despite experiencing a cosmic beatdown, the LMC managed to maintain a compact stub of its erstwhile halo, a feat it could not have pulled off had it been less massive.



The <a href="https://www.earth.com/news/starburst-spikes-seen-exploding-from-nebula-n79-are-1630-light-years-long/" target="_blank" rel="noreferrer noopener">LMC</a>, while only 10% of the mass of the Milky Way, is still chunkier than most dwarf galaxies.



Sapna Mishra, the lead author of the study, argues that the Milky Way’s own gigantic halo truncates or quenches the LMC’s gas supply. Yet even while engaging in this catastrophic dance with the Milky Way, the LMC retains 10% of its halo, thanks to its notable mass.



Most of the LMC's halo was stripped away due to a fascinating phenomenon known as ram-pressure stripping. The dense atmosphere of the Milky Way repels the incoming LMC, creating a wake of gas following the dwarf galaxy - much like the tail of a comet.



"I like to think of the Milky Way as this giant hairdryer, and it's blowing gas off the LMC as it comes into us," noted Fox. He explained that the Milky Way pushed back so violently that the ram pressure stripped away most of the LMC's original halo mass.



<h2 class="wp-block-heading" id="h-future-studies-of-the-large-magellanic-cloud">Future studies of the Large Magellanic Cloud</h2>



Due to its mass and proximity to the Milky Way, the Large Magellanic Cloud presents us with a unique astrophysics laboratory. It allows scientists to understand galactic dynamics in the earlier eras of the universe when galaxies were in closer quarters.



It's also a reminder that the galaxy interaction process is not as clean-cut and simple as we might imagine, but rather a wild, chaotic dance of cosmic forces.



As for the future, the research team is set to investigate the front side of the LMC's halo, a region hitherto unexplored.



Scott Lucchini, a co-author of the study from the <a href="https://www.cfa.harvard.edu/" target="_blank" rel="noreferrer noopener">Center for Astrophysics | Harvard &amp; Smithsonian,</a> points out the next objective.



"In this new program, we are going to probe five sightlines in the region where the LMC's halo and the <a href="https://www.earth.com/news/milky-way-galaxy-is-surrounded-by-massive-magnetic-fields/" target="_blank" rel="noreferrer noopener">Milky Way's halo</a> are colliding. This is the location where the halos are compressed, like two balloons pushing against each other."



The study is published in <a href="https://arxiv.org/abs/2410.11960v1" target="_blank" rel="noreferrer noopener">The Astrophysical Journal</a>.



Image Credit: NASA, ESA, Ralf Crawford (STScI)



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What happened when a dwarf galaxy clashed with the Milky Way?

While space is often thought of as a quiet, eerie place of stillness, a dramatic saga is unfolding on the outskirts of our Milky Way galaxy. NASA’s Hubble Space Telescope is serving as an eyewitness to this interstellar drama. The protagonist of this tale? None other than the Large Magellanic Cloud (LMC), one of our closest galactic neighbors. A brush with the Milky Way Even though it is classified as a dwarf galaxy, the LMC steals the show on the canvas of the southern night sky, where...

A new study published in the <a href="https://www.jneurosci.org/content/early/2021/11/11/JNEUROSCI.1483-21.2021">Journal of Neuroscience</a> has found that physical activity in middle and old age dampens inflammation in the <a href="https://www.earth.com/news/how-a-grandmothers-brain-reacts-to-the-sight-of-her-grandchildren/">brain</a>. This prevents cognitive decline and either decreases the risk of developing medical conditions such as Alzheimer’s disease or at least mitigates some of their worst effects.



By studying 167 people with an average age of 90 at their death, a research team from the <a href="https://www.ucsf.edu/">University of California, San Francisco</a> (UCFA) found that those who exercised regularly had a lower level of microglia (types of cells that can cause inflammation) activation in the brain.



“Microglia, the brain's resident immune cells, activate to clear debris and foreign invaders from the brain. But too much activation can trigger inflammation, damage neurons and disrupt brain signaling,” explained study lead author Katlin Casaletto, a neuropsychologist at UCFA. “Exercise helps reduce abnormal activation in animals — but that link hadn't been established in humans.”



In order to assess the relation between exercise and cognitive functioning in humans, Dr. Casaletto and her colleagues asked the participants to wear activity monitors 24 hours per day for up to ten days before their annual cognitive exams. 



After the participants died, the researchers measured microglia activation and several markers of Alzheimer’s disease in their brain tissue (nearly 60 percent of them developed Alzheimer’s by the time of their death), and compared the findings to the level of exercise the participants engaged in earlier.



&nbsp;“Greater physical activity was linked to lower microglial activation,” Dr. Casaletto reported. “This was particularly in the inferior temporal gyrus — a brain region hit hardest by Alzheimer's. Physical activity had a more pronounced effect on inflammation in people with more severe Alzheimer's pathology.”



“These are the first data supporting microglial activation as a physiological pathway by which physical activity relates to brain heath in humans. Though more interventional work is needed, we suggest physical activity may be a modifiable behavior leveraged to reduce pro-inflammatory microglial states in humans.”&nbsp;&nbsp;



In future studies, the researchers plan to investigate in more detail how physical activity relates to better cognitive aging and reduced risk of neurodegenerative diseases.



---



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

Physical activity reduces the risk of Alzheimer’s

A new study published in the Journal of Neuroscience has...

A new study led by the <a href="https://www.sorbonne-universite.fr/">University of Sorbonne</a> has found that natural selection imposed by different microhabitats across <a href="https://www.earth.com/news/coordinated-efforts-needed-to-slow-deforestation/">forest</a> strata can drive adaptive codivergence in wing shapes, flight behaviors, and aerodynamic efficiency among closely related species of Morpho butterflies. These are brightly colored and iconic butterflies that live in tropical Amazon forests. 



“The diversity of flying animals suggests that countless combinations of flight morphologies and behaviors have evolved with specific lifestyles, thereby exploiting diverse aerodynamic mechanisms,” wrote the study authors. “How morphology, flight behavior, and aerodynamic properties together diversify with contrasting ecology remains to be elucidated.”



Although insect flight has been studied in great detail in a variety of species, the evolution of flight among closely related species adapted to different habitats is not yet well understood.&nbsp;



Using high-speed videography to observe freely flying butterflies, combined with morphometric analyses and aerodynamic modelling, an international team of scientists investigated codivergences in wing shape, flight behavior, and aerodynamic efficiency among 12 Morpho species living in different forest strata.



The researchers discovered that these species have evolved a diverse set of morphological and behavioral characteristics which differ depending on whether they live in the forests’ understories or canopies. While butterflies occupying cluttered understory habitats displayed more powerful wing-flapping phases that resulted in agile and fast flight, those adapted to open canopy habitats evolved improved and more efficient gliding capacities.



“By comparing canopy and understory species, we show that adaptation to an open canopy environment resulted in increased glide efficiency,” the study authors explained. “Moreover, this enhanced glide efficiency was achieved by different canopy species through distinct combinations of flight behavior, wing shape, and aerodynamic mechanisms, highlighting the multiple pathways of adaptive evolution.”



These findings underline the crucial importance of the habitats that different animal species occupy in shaping their morphology, behavior, and lifestyles.&nbsp;&nbsp;



The study is published in the journal <a href="https://www.science.org/doi/10.1126/science.abh2620">Science</a>.



---



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

Butterflies’ habitat influences their flight behavior

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

A new study published in the journal <a href="https://dx.doi.org/10.1038/s41560-021-00937-z">Nature Energy&nbsp;&nbsp;&nbsp;</a> has found that electricity could become the cheapest <a href="https://www.earth.com/news/less-than-1-chance-that-earths-energy-imbalance-has-occurred-naturally/">energy</a> source by 2050, fundamentally changing the current shares in energy consumption from climate-damaging fossil fuels to renewable electric sources.



Today, 80 percent of energy demands for industry, heating buildings, and mobility are met by burning fossil fuels, and only 20 percent by electricity.&nbsp;



“Our research finds that relation can be pretty much reversed by 2050, making the easy-to-decarbonize electricity the mainstay of global energy supply,” said study lead author Gunnar Luderer, a researcher at the <a href="https://www.pik-potsdam.de/en/home">Potsdam Institute for Climate Impact Research</a> (PIK) and a professor of Global Energy Systems Analysis at the<a href="https://www.tu.berlin/en/"> Technical University of Berlin</a>.&nbsp;



While for a long period, fossil fuels were much cheaper and accessible energy sources than electricity, the prices for solar electricity fell by 80 percent in the past decade.&nbsp;



“This development has the potential to fundamentally revolutionize energy systems. Our computer simulations show that together with global carbon pricing, green electricity can become the cheapest form of energy by 2050, and supply up to three quarters of all demand,” explained Luderer.



The reason for this significant drop in pricing lies in the groundbreaking technological progress in solar and wind power generation, as well as in the fact that increasingly more energy demands can be electrified, including cars, heating systems, or steel production. &nbsp;



“All in all, we find that more than half of all energy demand from industry can be electrified by 2050,” said study co-author Silvia Maddedu, a researcher at PIK.&nbsp;



According to scientists, this increased use of electricity as an energy source will be crucial for mitigating climate change and maintaining sustainable temperature values. However, curbing fossil fuel use remains highly important for achieving these goals.



“The era of electricity will come either way. But only sweeping regulation of fossil fuels across sectors and world regions – most importantly some form of carbon pricing – can ensure it happens in due time to reach 1.5 degrees,” said Luderer.



In order to meet the climate goals of the Paris Agreement, decisive and global political coordination in pricing carbon, scrapping levies on electricity, expanding grid infrastructures, and redesigning electricity markets are urgently needed.&nbsp;&nbsp;&nbsp;&nbsp;



“If these elements come together, the prospects of a renewables-based green energy future look truly electrifying,” concluded Luderer.



---



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

Electricity may be the cheapest energy source by 2050

A new study published in the journal Nature Energy&nbsp;&nbsp;&nbsp; has...

Teen,Wild,Orangutan,Climbing,Down,The,Tree,In,The,Forest

An international team of researchers from 16 different institutions published a paper in the journal <a href="https://elifesciences.org/">e-life</a> on a two million year old primate <a href="https://www.earth.com/news/fossil-linking-snakes-and-lizards-was-wrongly-identified/">fossil</a>. The research combined the discovery of a vertebrae from a human relative, Australopithecus sediba, along with previously discovered vertebrae fossils. The study revealed that not only could A. sediba walk upright like a human, she could also climb like an ape.



The fossils were discovered in 2015 during a mining excavation in South Africa next to the “cradle of humanity” near the site of the first A. sediba fossil that was found in 2008. The fossil vertebrae were discovered in a hard matrix, nearly perfectly articulated. Rather than removing the fossils in dangerous and laborious preparation, they were analyzed with a Micro-CT scanner. 



Once the fossils were imaged, it was clear that these vertebrae articulated well with type specimens of the same fossil - a female nicknamed “Issa” which means “protector” in Swahili. The ancient fossils of human relatives showed that A. sebida had, like modern humans, only five lumbar vertebrae.



“The lumbar region is critical to understanding the nature of bipedalism in our earliest ancestors, and to understanding how well adapted they were to walking on two legs," said study lead author Professor Scott Williams of New York University and <a href="https://www.wits.ac.za/">Wits University</a>.



"Associated series of lumbar vertebrae are extraordinarily rare in the hominin fossil record, with really only three comparable lower spines being known from the whole of the early African record.”



The discovery of Issa makes her one of only two hominin fossils with well preserved backs, especially lower backs. 



“While Issa was already one of the most complete skeletons of an ancient hominin ever discovered, these vertebrae practically complete the lower back and make Issa’s lumbar region a contender for not only the best-preserved hominin lower back ever discovered, but also probably the best preserved," said Professor Lee Berger, original discoverer of A. sebida and leader of the Malapa project.



This relatively complete lower back allowed the scientists to see that Issa had a curved spine similar to modern humans, something seen as an adaptation for bipedalism.&nbsp;



Other adaptations suggest that Issa had strong trunk muscles, an adaptation for climbing. All together this shows Issa to be a transitional fossil, somewhere between an animal that spent all her time walking and one that spent all her time climbing. “Issa walked somewhat like a human but could climb like an ape,” said Berger.



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By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Ancient relative climbed like an ape, walked like a human

An international team of researchers from 16 different institutions published...

New research published in the journal <a href="https://dx.doi.org/10.1126/science.abm8136">Science</a> has found that warmer <a href="https://www.earth.com/news/rising-temperatures-are-harming-bumblebee-diet/">temperatures</a> and artificial lights in cities can alter the timing of urban tree greening in the spring. The study revealed that tree leaves bud earlier in U.S. cities compared to rural areas, and that artificial light accelerates this effect, as the climate warms.



“The effect of light pollution on vegetation phenology is a blind spot,” said study lead author Lin Meng, a postdoctoral fellow at <a href="https://www.lbl.gov/">Lawrence Berkeley National Lab</a> in Berkeley, California. 



“We as ecologists know a lot about the impact of warming and increased carbon dioxide concentration on plants because these are the two most significant aspects of climate change… but light doesn’t change in nature…So, most people just didn’t think of it.”



While global warming has shifted the timing of global seasonal tree events such as leafing, budding, or greening, urban environments pose additional challenges to trees, including warmer temperatures than in rural areas (a phenomenon known as the “<a href="https://www.earth.com/earthpedia-articles/urban-heat-island/">urban heat island effect</a>”), and the presence of artificial light at night from a variety of sources (public streetlights, buildings, advertising lights, vehicles) that has a significant impact on the regular light cycle plants depend on.



By using satellite data from the <a href="https://www.usanpn.org/usa-national-phenology-network">USA National Phenology Network</a> and <a href="https://blackmarble.gsfc.nasa.gov/">NASA’s Black Marble</a>, Dr. Meng compared spring “green-up dates” in urban versus rural areas in the 85 largest U.S. cities for the period 2001 to 2014. She discovered that, due to warmer temperatures, green-up occurred about six days earlier in urban areas compared to rural ones. Furthermore, in locations with intense artificial light, green-up occurred nine days earlier.



“My findings highlight artificial light as an understudied factor on phenology, which may supplement daylength and facilitate earlier spring greening under a warmer climate,” said Meng.



“This research provides important insight into the impacts of the urban environment on natural processes essential to ecosystem function. Understanding how city-induced temperature and light influence vegetation both increases our knowledge of these basic ecological interactions and will help us design more resilient urban landscapes," concluded Sacha Vignieri, Deputy Editor for Research at the journal&nbsp;Science.



This study was the grand winner of the 2021 <a href="https://scienceprize.scilifelab.se/">Science and SciLifeLab Prize for Young Scientists</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

Artificial lights cause earlier tree greening in the spring

New research published in the journal Science has found that...

For hundreds of millions of years, large vertebrate herbivores inhabited most of the <a href="https://www.earth.com/news/staggering-amount-of-wastewater-impacts-coastal-ecosystems/">ecosystems</a> on our planet. But during the late Quaternary period, particularly between 50,000 and 6,000 years ago, rapid extinctions of these megaherbivores occurred. This has left most continents depauperate in large grazing species today. In addition, other species, such as predators and parasites that were dependent on the ancient grazers, also suffered massive extinctions.



While the potential causes of these extensive megafaunal extinctions have been studied and debated, less attention has been given to the consequences for ecological interactions and ecosystem functioning.&nbsp;



In collaboration with the Utah Natural History Museum, Yale scientists have now conducted research into whether the extinctions of large herbivores, such as woolly mammoths, giant bisons, giant deer, rhinoceroses and ancient horses, were associated with a contemporaneous increase in fires in the world’s ecosystems. Their hypothesis was that the loss of these grazers would have resulted in a build-up of grass that could fuel such fires.



The researchers first gathered data on the large mammals that became extinct in the late Quaternary period across four continents, and their approximate dates of extinction. The information revealed that South America lost the most grazers (83% of all its recorded species), followed by North America (68%). These losses were significantly higher than in Australia (44%) and Africa (22%).



They then compared these findings with records of fire activity as revealed by the presence of charcoal deposits in lake sediments. Using sediments from 410 sites globally, which provided a historical record of regional fire activity across continents, they found that fire activity increased after the mega grazer extinctions.&nbsp;



Moreover, continents that lost more grazers (South America, then North America) saw larger increases in the incidence of fires, whereas continents that had lower rates of extinction (Australia and Africa) saw little change in grassland fire activity.



“These extinctions led to a cascade of consequences,” said study co-author Allison Karp, a postdoctoral associate in the Department of Ecology &amp; Evolutionary Biology at <a href="https://www.yale.edu/">Yale University</a>. “Studying these effects helps us understand how herbivores shape global ecology today.”



Interestingly, Karp and senior author Carla Staver, associate professor of ecology and evolutionary biology in Yale’s Faculty of Arts and Sciences, found that although many ancient browser species – such as mastodons, diprotodons, and giant sloths, which foraged on shrubs and trees in wooded areas – also went extinct during the same period, their losses had less impact on fires in woodland habitats.



By contrast, grassland ecosystems were altered forever by the loss of the mega grazers. Grasses tolerant of herbivore grazing pressure were wiped out by the more frequent fires, and predator populations collapsed. Certain fruit-bearing trees, that were dependent on the herbivores for seed dispersal, also became extinct. New species of grass became established and new grazers, including domestic livestock, eventually adapted to the transformed ecosystems.



The findings illustrate why scientists should consider the role of grazing livestock and wild grazers in fire mitigation and climate change, the authors said.&nbsp;



“This work really highlights how important grazers may be for shaping fire activity,” said Staver. “We need to pay close attention to these interactions if we want to predict the future [effects] of fires accurately.”



The study is published in the journal <a href="https://www.science.org/">Science</a>.



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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

Extinction of ancient grazers changed fire regimes

For hundreds of millions of years, large vertebrate herbivores inhabited...

Flavored vapes have recently been regarded with just as much suspicion as traditional <a href="https://www.earth.com/news/e-cigarettes-potential-carcinogen/">cigarettes</a>. However, a new study from researchers at the <a href="https://www.uea.ac.uk/">University of East Anglia</a> suggests that vaping is less harmful than smoking, and may make it easier to kick the habit.&nbsp;



“There has been a lot of concern that young people may start vaping because they are attracted to e-liquid flavors, and that it could potentially lead them to start smoking tobacco," said study lead author Caitlin Notley.



"We wanted to find out more about the links between vape flavors, the uptake of vaping among young people, and whether it leads to regular vaping and, potentially, tobacco smoking.”



Examining 58 past studies, which cumulatively examined over 500,000 subjects, Notley and her colleagues find that "flavored e-liquids are an important aspect of vaping that young people enjoy. This suggests that flavored products may encourage young people to switch away from harmful tobacco smoking towards less harmful vaping.”&nbsp;



In other words, given the choice between vaping and smoking actual cigarettes, adolescents and young adults are more likely to choose the former, and are less likely to adopt traditional smokes afterward.



“Flavors may be an important motivator for e-cigarette uptake – but we found no evidence that using flavored e-liquids attracted young people to go on to take up tobacco smoking.” Importantly, Notley says she and her colleagues “found no adverse effects or harm caused by using liquid vape flavors."



However, these results are not necessarily to be taken at face value. The researchers noted that previous research attempts did not very clearly define what they meant when they said “e-liquid flavors.” Without clear definitions, it’s hard to test and replicate the results of the study.&nbsp;



Still, Notley believes that “ensuring the continued availability of a range of e-liquid flavors is likely to be important in encouraging young people who smoke to switch to vaping as a less harmful alternative.”



The study is published in the journal <a href="https://www.addictionjournal.org/">Addiction</a>.



---



By <a href="http://mailto:rugerpaleo@gmail.com">Alex Ruger</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Flavored vapes may actually help young people quit smoking

Flavored vapes have recently been regarded with just as much...

Old,Man,Or,Grandfather,In,Medical,Mask.,The,Dangers,Of

The first data from COVID-19 research by the Canadian Longitudinal Study on Aging (CLSA) has been published today in the journal <a href="https://www.nature.com/nataging/">Nature Aging</a>. The analysis shows that the pandemic has had significant impacts on the mental health of older people, particularly those who were lonely, <a href="https://www.earth.com/news/isolated-tropical-birds-may-represent-new-species/">isolated</a> or had pre-existing medical conditions.&nbsp;



The research team, led by Parminder Raina from the <a href="https://www.mcmaster.ca/">McMaster University</a>, found that 43 percent of adults aged 50 or older experienced moderate or high levels of depressive symptoms at the beginning of the COVID-19 pandemic, and that this rate increased over time.&nbsp;



Data was collected using telephone and online surveys to examine how factors such as health status, income and social participation had impacted the development of depressive symptoms in older people. Data was gathered during the initial lockdown, starting in March 2020, and after re-opening following the first wave of COVID-19 in Canada.&nbsp;



The researchers found that loneliness was the most significant predictor of worsening depressive symptoms, with other pandemic-related stressors, such as family conflict, also increasing the odds. In addition, people with lower income and poorer health, either due to pre-existing health conditions or health concerns that developed during the pandemic, experienced a greater impact.



“The COVID-19 pandemic has had a disproportionate impact on older adults, with groups of people who were already marginalized feeling a far greater negative impact,” said Raina, who is a lead principal investigator of the CLSA and also a professor in the Department of Health Research Methods, Evidence, and Impact and scientific director of the McMaster Institute for Research on Aging.



“Those who were socially isolated, experiencing poorer health and of lower socioeconomic status were more likely to have worsening depression as compared to their pre-pandemic depression status, collected as part of the Canadian Longitudinal Study on Aging since 2011."



Women were also disproportionately affected, with higher odds of pandemic depression than men. Female respondents reported that factors such as separation from family and increased time caregiving were stressors during this time.



The CLSA is a large, national, long-term study that follows approximately 50,000 adults, aged between 45 and 85 when first recruited. The study aims to understand how changing biological, medical, psychological, social, economic and lifestyle factors impact the health of people as they age. The platform is funded by the Government of Canada through the Canadian Institutes of Health Research and the Canada Foundation for Innovation.



The research team included CLSA principal investigators Christina Wolfson of McGill University, Susan Kirkland of Dalhousie University, Lauren Griffith of McMaster, along with a national team of investigators.



“These findings suggest the negative mental health impacts of the pandemic persist and may worsen over time, and [this] underscores the need for tailored interventions to address pandemic stressors and alleviate their impact on the mental health of older adults,” concluded Raina.



---



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

Older people twice as likely to suffer from pandemic depression

The first data from COVID-19 research by the Canadian Longitudinal...

Over 90 percent of <a href="https://www.earth.com/news/dopamine-plays-a-central-role-in-songbird-mating/">bird</a> species are monogamous, often mating for life, and albatrosses are some of the most loyal. Albatrosses have a rather awkward growing-up phase. They try out relationships with several partners, but they generally stick together for life.&nbsp;



However, a new study published in the journal <a href="https://royalsocietypublishing.org/doi/full/10.1098/rspb.2021.2112">Proceedings of the Royal Society B</a> has found that, due to climate change, albatrosses start “divorcing” more. “In many socially monogamous species, divorce is a strategy used to correct for sub-optimal partnerships and is informed by measures of previous breeding performance,” wrote the study authors.



“The environment affects the productivity and survival of populations, thus indirectly affecting divorce via changes in demographic rates. However, whether environmental fluctuations directly modulate the prevalence of divorce in a population remains poorly understood.”



By using a longitudinal dataset on the long-lived black-browed albatross (Thalassarche melanophris), a team of researchers led by the <a href="https://www.ulisboa.pt/en">University of Lisbon</a> investigated how environmental variability affected divorce rates among albatrosses. They found that in recent years, in which water temperatures gradually rose, up to eight percent of albatross couples split up.



Normally, albatross divorce is triggered by a failure to breed. However, the new findings showed that albatross pairs were even divorcing after a successful breeding season. According to the researchers, this might be caused by the problems long-distance relationships entail. Since warming waters force the birds to hunt for longer and fly further away, often failing to return for the next breeding season, their partners may move on with another bird.



Furthermore, albatross stress hormones increase in harsher environments, such as when sea waters are warmer. With tougher breeding conditions and food scarcity, albatrosses can start “blaming” each other for their difficulties in proper sustenance and breeding, ultimately leading to divorce.



“For the first time, to our knowledge, we document the disruptive effects of challenging environmental conditions on the breeding processes of a monogamous population, potentially mediated by higher reproductive costs, changes in phenology and physiological stress. Environmentally driven divorce may therefore represent an overlooked consequence of global change,” concluded the researchers.



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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

Albatrosses are divorcing more due to climate change

Over 90 percent of bird species are monogamous, often mating...

An international team of researchers from <a href="https://english.jiangnan.edu.cn/">Jiangnan University</a>, China, <a href="https://www.qmul.ac.uk/">Queen Mary University of London</a>, and the <a href="https://www.oulu.fi/en">University of Oulu</a>, Finland, have recently discovered that a specific type of gut bacteria (Lactobacillus apis) is linked to enhanced memory in <a href="https://www.earth.com/news/bumblebees-are-attracted-to-the-humidity-of-flowers/">bumblebees</a>. This study adds to the growing scientific evidence that the gut microbiome, consisting of trillions of microbes living in our intestines, can affect animal cognition and behavior.



Since bees have a relatively small community of gut microbes compared to mammals, they are ideal models to explore the role of specific gut bacteria on differences in cognition and behavior between individuals.



In order to test bees’ memory and learning abilities, the researchers created different colored artificial flowers, some of them associated with a sweet sucrose solution, and others with a bitter tasting solution containing quinine, which is a repellent for bees. Afterwards, they assessed how quickly the bees managed to learn which colors are associated with a sugar reward, and whether they were able to remember this information three days later.



By sequencing gut samples from the bees, the scientists compared individual differences in learning and memory abilities with the levels of different gut microorganisms. They found that bumblebees with more Lactobacillus apis in their microbiome had a better memory and stronger learning abilities than those with fewer bacteria.&nbsp;



Furthermore, to confirm that the numbers of Lactobacillus apis were directly responsible for the differences in learning and memory, the researchers added these bacteria to the bumblebees’ diet and measured their responses to the same task.&nbsp;



“Our results suggest not only that the natural variation in the amount of a specific gut bacterium effects memory, but also show a causal link – that by adding the same bacterial species to a bee’s diet can enhance their memories,” said study lead author Dr. Li Li, a postdoctoral fellow at Jiangnan University.



“This is a fascinating finding that could apply to humans as well as to bees. Our findings add to growing evidence of the importance of gut-brain interactions in animals and provide insights into the cause of cognitive differences in natural bumblebee populations,” added study co-author Lars Chittka, a professor of Zoology at Queen Mary University.



This study, published in the journal <a href="https://dx.doi.org/10.1038/s41467-021-26833-4">Nature Communications</a>, shows that we can improve our cognitive abilities by regulating gut microbiota.&nbsp;&nbsp;



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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

Gut bacteria enhances memory in bees

An international team of researchers from Jiangnan University, China, Queen...

Couple,Stretching,Outdoors,Before,Morning,Run.,Handsome,Bearded,Man,And

A new study used anonymous data from nearly 3,000 US counties to examine the correlation between <a href="https://www.earth.com/news/extreme-heat-events-are-becoming-increasingly-common/">extreme heat</a> and visits to the hospital emergency department for heat-related illness. The study specifically examined emergency department visits to people’s ages, something rarely looked at for younger and middle aged people.&nbsp;



Study senior author Dr. Gregory Wellenius is a professor at <a href="https://www.bu.edu/sph/">Boston University School of Public Health</a> (BUSPH).



“Many illnesses that lead to utilization of the emergency department do not lead to hospitalization because they can be treated in a short amount of time, particularly among the younger adult population," explained Dr. Wellenius.



"By looking at emergency room visits, we aimed to obtain a more comprehensive picture of the true burden of disease that might be attributed to the days of high heat.”



The difference in visits to the emergency department may have more to do with lifestyle differences between the young and older people than with physiological differences.



“Younger adults may be at greater risk of exposure to extreme heat, particularly among workers that spend substantial time outdoors," said Dr. Shengzhi Sun. "Younger adults may also not realize that they too can be at risk on days of extreme heat.”



The study also showed that unusual highs for usually cooler regions are especially dangerous, something likely to increase with continued climate change.



“While extreme heat threatens everyone’s health, this study provides further evidence that it is especially dangerous in regions with cooler climates that may be less adapted to heat," said . Dr. Kate Weinberger.&nbsp;



"As temperatures continue to rise due to climate change, the implementation of heat adaptation measures in these regions will be critically important.”



“Although climate change is a global problem and heat threatens the health of everybody across the world, the impacts are felt locally, and the solutions have to be tailored to local needs," said Dr. Wellenius.



"What works for heat wave preparedness in the Pacific Northwest is really different from what works in the southeastern US, so the solutions have to be localized to accommodate the needs of the local community.”



The study is published in the <a href="https://www.bmj.com/">British Medical Journal</a>.



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By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Young adults have a greater risk of extreme heat exposure

A new study used anonymous data from nearly 3,000 US...

A recent study by <a href="https://www.osu.edu/">Ohio State University</a> reveals that extending social support to one's spouse, friends, and family is just as crucial as receiving it when it comes to one's health.



While experts have long believed that obtaining social support from others is beneficial to health, previous studies have yielded varied results. The research team set out to investigate whether providing assistance can also have a positive impact on one's health.



The researchers looked for a key indicator of health - chronic inflammation. Study participants who reported they were able to provide social support to family and friends had lower inflammation. 



“Positive relationships may be associated with lower inflammation only for those who believe they can give more support in those relationships,” said study lead author Professor Tao Jiang.



The results suggest that having friends to depend on may not improve your well-being unless you also express your willingness to assist them when they are in need of support. The findings also indicate that the healing potential of strong relationships stems from mutual support. 



“It may be that when people believe they can give more support to friends and family, these relationships are especially rewarding and stress-relieving, which reduces inflammation,” said Professor <a href="https://psychology.osu.edu/people/way.37">Baldwin Way</a>.



The study relied on information from 1,054 healthy adults between the age of 34 and 84 who took part in the National Survey of Midlife Development in the United States.&nbsp;



The participants responded to a questionnaire that evaluated their "social integration," which included questions about their marital status, living with a partner, how frequently they contacted family and friends, and how frequently they joined social groups or activities.



The volunteers were also asked to rate how much they think they could rely on their relatives, friends, or spouse for assistance in the event of an emergency.



According to Professor Jiang, the significance of this research is due to the fact that this dataset is one of the few that additionally asked individuals to rate how much they were available to support family, friends, and spouses.



“This work underscores the importance of incorporating the concept of giving support into future research in this area,” said Professor Jiang.



Two sets of blood tests were conducted years apart, and the parameters studied included an interleukin-6 (IL-6) test, which measures the systemic inflammation in the body.



“Higher levels of IL-6 are associated with increased risk for many of the diseases that are the top killers of Americans, including cardiovascular disease and cancer. That’s why we thought it was important to find out why previous studies found such weak evidence for the link between social support and lower inflammation,” explained Professor Way.



The experts determined that the health benefit of being accessible to others remained true, even after accounting for a wide range of other characteristics that could influence inflammation, such as age, income, and education, as well as health habits, medication use, and known medical illnesses. 



The researchers also found that the relationship between health and the desire to help others may be more significant for women. According to Professor Jiang, a preliminary analysis indicates that the link between providing social support and improved health is more evident in women.



“This reflects the idea that social relationships are often seen as more important for women than for men. But our sample size was not large enough to show that conclusively. We need to study that issue further,” said Professor Jiang. 



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By <a href="http://mailto:ashikha92@gmail.com">Ashikha Raoof</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Giving social support to others is good for your health

A recent study by Ohio State University reveals that extending...

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



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



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

Flu viruses are more flexible than expected

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;



"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.



"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."



"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;



The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;



Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.



Video Credit: American Chemical Society&nbsp;



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



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

Detecting mercury contamination with the tap of a finger

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

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

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> explores the ability of salt to transform the way that foods and beverages taste. Salt is known to cover up undesirable flavors, such as bitterness in coffee or beer, but how exactly does sodium chloride change the taste of other compounds?



One previous study showed that, not only does salt suppress bitterness, but also enhances sweetness and sourness. Another study revealed that bitterness reduction by salt seems to be happening at the tongue receptor level as well as in the brain.&nbsp;



While it is known that salt taste is mediated by the presence of sodium channels in the form of taste buds, experts believe that there is also an unknown receptor responsible for how we taste salt that has not yet been identified.&nbsp;



Video Credit: ACS Reactions



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



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

How does salt makes things taste better?

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



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



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



Video/ Image Credit: ESA



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



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

Santiago, Chile in South America

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Spiral,Galaxy,,Illustration,Of,Milky,Way

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Astronomers at <a href="https://www.jhu.edu/">Johns Hopkins University</a> have created an interactive map of the universe, including the actual position and real colors of 200,000 galaxies. The map allows the public to access data that was previously only available to scientists.



The map was developed using data collected by the Sloan Digital Sky Survey. For over two decades, a telescope in New Mexico was aimed at slightly different locations to capture the night sky.&nbsp;



"Growing up I was very inspired by astronomy pictures, stars, nebulae and galaxies, and now it's our time to create a new type of picture to inspire people," said map creator Brice Ménard, a professor at Johns Hopkins. "Astrophysicists around the world have been analyzing this data for years, leading to thousands of scientific papers and discoveries. But nobody took the time to create a map that is beautiful, scientifically accurate, and accessible to people who are not scientists. Our goal here is to show everybody what the universe really looks like."



"In this map, we are just a speck at the very bottom, just one pixel. And when I say we, I mean our galaxy, the Milky Way which has billions of stars and planets. We are used to seeing astronomical pictures showing one galaxy here, one galaxy there or perhaps a group of galaxies. But what this map shows is a very, very different scale."



"From this speck at the bottom, we are able to map out galaxies across the entire universe, and that says something about the power of science."



The <a href="https://mapoftheuniverse.net/">interactive map</a> is available online, where it can be downloaded for free.



Video Credit: Johns Hopkins&nbsp;



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



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

Interactive map of the universe includes 200,000 galaxies

[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



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



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

The city of Dublin on Ireland's east coast

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the province of Zaragoza in northeast Spain. The image was captured by the Copernicus Sentinel-2 mission.



"Together with the provinces of Huesca and Teruel, Zaragoza formed the old kingdom of Aragon. Its capital, also called Zaragoza (not visible in this image) is home to around half of Aragon’s population," says ESA.



"The Ebro River can be seen winding its way through the province from west to east in this image. Between its source in the Cantabrian Mountains in the northwest and its delta on the Mediterranean coast, the Ebro River is fed by more than 200 tributaries as it flows 910 km across much of northern Spain."



Since rainfall is very scarce in this region, irrigation in the Ebro basin is critically important. In the valleys surrounding the Ebro River, many fields are used for growing crops such as corn, wheat, and barley.



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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

[sendtonews key="0dEcERCq61-2283382-12187" type="single"] Today’s Video of the Day from Stowers...

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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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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes two exoplanets that are orbiting a star 218 light-years away. A team of researchers led by the University of Montreal has found evidence that these planets are "water worlds."



The experts used data from NASA’s Hubble and Spitzer Space Telescopes. They discovered that exoplanets Kepler-138 c and Kepler-138 could be composed largely of water.



"We previously thought that planets that were a bit larger than Earth were big balls of metal and rock, like scaled-up versions of Earth, and that's why we called them super-Earths," explained study co-author Björn Benneke.&nbsp;



"However, we have now shown that these two planets, Kepler-138 c and d, are quite different in nature and that a big fraction of their entire volume is likely composed of water. It is the best evidence yet for water worlds, a type of planet that was theorized by astronomers to exist for a long time."



Video Credit: NASA Goddard



Image Credit: NASA, ESA, and Leah Hustak (STScI)



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



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

Two distant planets may be "water worlds"

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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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



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

Tiger sharks are shifting poleward as temperatures rise

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