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From the tiniest fluctuations after the Big Bang, gravity has orchestrated the formation of galaxies, stars, and planets, creating the vast cosmic web we see today.



Gravity isn't just what keeps us grounded -- it's been shaping the universe since its earliest days. Recent studies have provided the most precise tests of gravity on the grandest scales imaginable. 



By examining how cosmic structures have grown over the past 11 billion years, scientists have confirmed that gravity behaves just as <a href="https://www.earth.com/news/cosmic-glitch-in-gravity-expands-the-theory-of-general-relativity/" target="_blank" rel="noreferrer noopener">Einstein's theory</a> of general relativity predicts, even across billions of light-years.



<h2 class="wp-block-heading" id="h-desi-tracks-gravity-over-11-billion-years">DESI tracks gravity over 11 billion years</h2>



Pauline Zarrouk, a cosmologist at the French National Center for Scientific Research (<a href="https://www.cnrs.fr/en" target="_blank" rel="noreferrer noopener">CNRS</a>) working at the Laboratory of Nuclear and High-Energy Physics (LPNHE), has been exploring this cosmic evolution.



In collaboration with the international team behind the Dark Energy Spectroscopic Instrument (<a href="https://www.desi.lbl.gov/" target="_blank" rel="noreferrer noopener">DESI</a>), Zarrouk and her colleagues have traced how cosmic structures grew over the past 11 billion years.



Using data from DESI, the researchers provided the most precise test to date of gravity on the largest scales. 



"General relativity has been very well tested at the scale of solar systems, but we also needed to test that our assumption works at much larger scales," Zarrouk explained. 



"Studying the rate at which galaxies formed lets us directly test our theories and, so far, we're lining up with what <a href="https://www.earth.com/news/radical-new-theory-finally-unites-gravity-spacetime-and-the-quantum-realm/" target="_blank" rel="noreferrer noopener">general relativity</a> predicts at cosmological scales."



<h2 class="wp-block-heading" id="h-einstein-is-smiling-from-the-grave">Einstein is smiling from the grave</h2>



Their findings confirm that gravity behaves as Einstein's theory of general relativity predicts, even across the immense distances of the universe. 



This validation supports our leading model of the cosmos and narrows down alternative theories of gravity that have been proposed to explain puzzling observations, like the <a href="https://www.earth.com/news/universe-expansion-rate-dark-energy-measured-11-billion-years-ago/" target="_blank" rel="noreferrer noopener">accelerating expansion</a> of the universe often attributed to dark energy.



The study also sheds light on <a href="https://www.earth.com/news/quantum-gravity-search-south-pole-neutrinos-experiment/" target="_blank" rel="noreferrer noopener">neutrinos</a> -- the elusive particles that zip through space almost undetected. 



Previous experiments determined that the combined mass of the three types of neutrinos should be at least 0.059 electron volts (eV/c²). For perspective, an electron has a mass of about 511,000 eV/c². 



DESI's results suggest that the total mass of neutrinos should be less than 0.071 eV/c², tightening the constraints on these mysterious particles.



<h2 class="wp-block-heading" id="h-desi-gravity-and-cosmic-structure">DESI, gravity, and cosmic structure</h2>



"Both our BAO results and the full-shape analysis are spectacular," said Dragan Huterer, a professor at the <a href="https://umich.edu/" target="_blank" rel="noreferrer noopener">University of Michigan</a> and co-lead of DESI's group interpreting the cosmological data. 



"This is the first time that DESI has looked at the growth of cosmic structure. We're showing a tremendous new ability to probe modified gravity and improve constraints on models of <a href="https://www.earth.com/news/dark-energy-is-ripping-the-universe-apart-but-we-arent-sure-how/" target="_blank" rel="noreferrer noopener">dark energy</a>. And it's only the tip of the iceberg."



DESI is no ordinary telescope. Mounted on the Nicholas U. Mayall 4-meter Telescope at <a href="https://kpno.noirlab.edu/" target="_blank" rel="noreferrer noopener">Kitt Peak National Observatory</a>, it's capable of capturing light from 5,000 galaxies at once. 



Funded by the DOE Office of Science, the project is now in its fourth year of surveying the sky and aims to collect data from roughly 40 million galaxies and quasars by the time it's done.



<a href="https://www.earth.com/news/theory-gravity-exists-without-mass-so-dark-matter-does-not-exist/" target="_blank" rel="noreferrer noopener">Testing gravity</a> at cosmic scales is crucial. While Einstein's theory has passed every test within our solar system, there's always the possibility that it might behave differently across the vastness of space. 



By confirming that gravity acts as expected over billions of light-years, scientists can be more confident in their models of how the universe has evolved. 



<h2 class="wp-block-heading" id="h-interpreting-the-desi-data">Interpreting the DESI data</h2>



<a href="https://profiles.utdallas.edu/mishak">Dr. Mustapha Ishak-Boushaki</a>, a professor of physics in the <a href="https://nsm.utdallas.edu/">School of Natural Sciences and Mathematics</a> at UT Dallas, co-led the DESI working group that interpreted the cosmological data.



“For this round of DESI results, I focused my efforts at UT Dallas on conducting a large part of the analysis on gravity, which puts constraints on how matter in the universe moves and how large-scale structures, such as clusters of galaxies, evolve,” explained Ishak-Boushaki. 



“The results from DESI, combined with datasets from other experiments, are consistent with general relativity theory operating at cosmic scales, although they do not completely exclude other theories of <a href="https://www.earth.com/news/central-theory-of-quantum-gravity-is-modeled-in-the-laboratory/" target="_blank" rel="noreferrer noopener">modified gravity</a>.”



The new results provide an extended analysis of <a href="https://news.utdallas.edu/science-technology/desi-findings-2024/" target="_blank" rel="noreferrer noopener">DESI’s first year of data</a>, which in April contributed to the largest 3D map of the universe to date and revealed hints that <a href="https://newscenter.lbl.gov/2024/04/04/desi-first-results-make-most-precise-measurement-of-expanding-universe/" target="_blank" rel="noreferrer noopener">dark energy might be evolving</a> over time.



“The latest analysis is also consistent with our previous findings that give preference to the theory that <a href="https://www.earth.com/news/dark-energy-could-explain-the-rapid-expansion-of-the-early-universe/" target="_blank" rel="noreferrer noopener">dark energy</a> is not constant, but dynamic, which is a very important result for cosmic acceleration,” Ishak-Boushaki said.



<h2 class="wp-block-heading" id="h-how-did-this-happen">How did this happen?</h2>



The collaboration is currently analyzing data from the first three years and expects to present updated measurements of <a href="https://www.earth.com/news/new-evidence-suggests-that-dark-energy-comes-from-black-holes/" target="_blank" rel="noreferrer noopener">dark energy</a> and the universe's expansion history by spring 2025. 



The recent results align with earlier hints that dark energy might be evolving over time, adding to the excitement for what's to come.



"Dark matter makes up about a quarter of the universe, and dark energy makes up another 70 percent, and we don't really know what either one is," said Mark Maus, a PhD student at <a href="https://www.lbl.gov/" target="_blank" rel="noreferrer noopener">Berkeley Lab</a> and UC Berkeley who worked on theory and validation modeling pipelines for the new analysis. 



"The idea that we can take pictures of the universe and tackle these big, fundamental questions is mind-blowing."



The study utilized nearly 6 million <a href="https://www.earth.com/news/lonely-quasars-in-the-early-universe-cannot-be-explained/" target="_blank" rel="noreferrer noopener">galaxies and quasars</a>, allowing researchers to peer up to 11 billion years into the past. 



<h2 class="wp-block-heading" id="h-what-s-next-for-desi-and-gravity">What's next for DESI and gravity?</h2>



To sum it all up, with just one year of data, DESI has made the most precise overall measurement of the growth of cosmic structures, surpassing previous efforts that took decades.



The DESI project is remarkable not just for its technological capabilities but also for its collaborative spirit. 



With over 900 researchers from more than 70 institutions worldwide, it's a testament to what can be achieved when the global scientific community comes together.



As we await the next round of results, one can't help but wonder: What other secrets of the universe are waiting to be uncovered? 



The quest to understand gravity, dark matter, and dark energy continues, and each new discovery brings us a little closer to unraveling the mysteries of the cosmos.



The full study was published in <a href="https://data.desi.lbl.gov/doc/papers/">several scientific journals</a>.



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New 'mind-blowing' gravity discovery proves Einstein right again

From the tiniest fluctuations after the Big Bang, gravity has orchestrated the formation of galaxies, stars, and planets, creating the vast cosmic web we see today. Gravity isn't just what keeps us grounded -- it's been shaping the universe since its earliest days. Recent studies have provided the most precise tests of gravity on the grandest scales imaginable. By examining how cosmic structures have grown over the past 11 billion years, scientists have confirmed that gravity behaves just as Einstein's theory of general relativity predicts, even across...

Marimo are fluffy, squishy green balls of underwater <a href="https://www.earth.com/news/brown-algae-absorb-half-a-billion-tons-of-co2-each-year/">algae</a> that can be found in just a few countries and have recently become highly popular with tourists, aquarium owners, and nature enthusiasts. They range in size from a pea to a basketball, and form when floating strands of Aegagropila linnaei&nbsp;are bundled together through the rolling motion of lake waters. In Japan, they have become so popular that they have their own yearly festival, merchandise, and even a mascot.



Unfortunately, recent years have witnessed significant declines in their population, mainly due to human intervention altering or polluting their freshwater habitats. However, according to a new study led by the <a href="https://www.u-tokyo.ac.jp/en/">University of Tokyo</a>, climate change could also play a significant role in their decline, by overexposing them to sunlight.



“We know that marimo can survive bright sunlight in warm summer waters, but the photosynthetic properties in marimo at low winter temperatures have not been studied, so we were fascinated by this point,” said study senior author Masaru Kono, a biologist at the University of Tokyo. “We wanted to find out whether marimo could tolerate it and how they respond to a low-temperature, high light-intensity environment.”&nbsp;&nbsp;



By analyzing how exposure to extreme light affected samples of marimo algae collected from Lake Akan in Japan, the researchers found that they could survive bright light for up to four hours and would recover if placed afterwards under a moderate light for half an hour. However, when exposed to bright light for six hours or more, the algae died.



“We demonstrated that damaged cells in marimo can repair themselves even after exposure to simulated strong daylight for up to four hours at cold temperatures (two-four degrees Celsius), when followed by moderate light exposure for just 30 minutes. This moderate light had a restorative effect which did not occur in the dark,” Kono explained.&nbsp;



“However, when exposed to strong daylight for six hours or more, certain cells involved in photosynthesis were damaged and the algae died, even after being treated with moderate light. These results suggest that photoinhibition (the inability to photosynthesize due to cell damage) would be a serious threat to marimo in Lake Akan, which receives more than 10 hours of sunlight a day in winter, if global warming proceeds and ice cover recedes.”



In future studies, the scientists aim to investigate what would happen to whole marimo balls if exposed to bright light for an extended period of time, and whether the outcome would be similar to that observed in the smaller threads. “In the present study, we used dissected filamentous cells, so we did not consider the effects of the structure of the spherical marimo and how it might protect against exposure to bright light. However, if damage to the surface cells increases under longer exposure to the direct sunlight, in an extreme case, this may affect the maintenance of their round bodies and lead to the disappearance of giant marimo. So, we need to constantly monitor the conditions at Lake Akan in the future,” Kono concluded.



The study is published in the <a href="http://dx.doi.org/10.3390/ijms24010060">International Journal of Molecular Sciences</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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Marimo algae balls threatened by climate change

Marimo are fluffy, squishy green balls of underwater algae that...

Icy mountains, with their snow, <a href="https://www.earth.com/news/melting-glaciers-could-unleash-dangerous-viruses/">glaciers</a> and permafrost, are important sources of water for downstream communities in many parts of the world. Some scientists refer to these frozen bodies as the ‘water towers of the world,’ since they store water during the cold winter months and release it slowly as meltwater during spring and summer, meeting the needs of people and ecosystems in lower lying areas.&nbsp;



However, as global warming takes effect, glacial ice and permafrost are receding or disappearing from these mountain regions, necessitating new water management strategies to ensure the continued stable supply of fresh water. Essentially, as ice melts in mountainous regions throughout the world, the glaciers, snow and permafrost no longer act as storage reservoirs, meaning that water supply in these regions will be provided solely by precipitation. Previous research has suggested that, by 2100 up to half of the world’s population could be living with water scarcity.&nbsp;



A recent study led by researchers from the <a href="https://www.birmingham.ac.uk/index.aspx">University of Birmingham</a> suggests that there is a lack of integrated water security knowledge for communities that depend on water supply from snow and ice. This is due to the fact that, in these regions, there is often limited understanding of what happens ‘beyond the cryosphere’ – that is the contribution from water sources other than frozen water, such as hillslopes, wetlands, and groundwater. Communities have just always depended on melting ice as a reliable supply of water.



Emerging research is showing that the effects of global warming and climate change are enhanced in mountainous areas, where glacier-related disasters such as ice avalanches and glacial lake outburst floods are becoming more commonplace. This highlights the fact that there are likely to be serious and life-threatening implications for the millions of people who depend on mountain water supply in these regions.&nbsp;



The study, published in the journal <a href="http://dx.doi.org/10.1038/s41893-022-00996-4">Nature Sustainability</a>, finds that there are huge gaps in available data on how communities use water from glaciers and mountain snow in combination with other water sources. This information will be crucial in formulating management plans for sustainable water use in future, as meltwater becomes less available. The picture is especially difficult to construct, say the researchers, because of complex mountain landscapes, differences in localized weather systems and a low density of data station records.



“In mountains, there are complex interconnections between the cryosphere [snow and ice] and other water sources, as well as with humans," said Professor David Hannah. "We need to identify the gaps in our understanding and rethink strategies for water security in the context of climate change adaptation and shifting human needs.”



The lack of data is exacerbated by low uptake of new monitoring technologies and approaches, particularly in lower income countries with limited institutional capacities. This further hampers the understanding of water use in high-altitude, data sparse regions in many parts of the world, and makes it very difficult to create models for future water management that can be scaled up accurately across watersheds.



Furthermore, the picture is complicated by uncertainties about future water needs. Information on population growth and likely adaptation to water security threats is limited, as are data on the future expansion of irrigated agriculture and hydropower, all of which will have substantial impacts on water access and allocation. In the light of these concerning gaps in understanding and knowledge, the research team have called for a fundamental rethink of the methods and technologies used to assess current water availability and to model future scenarios.



Study lead author Dr. Fabian Drenkhan conducted the research while at Imperial and now works at the Pontifical Catholic University of Peru. “The future is likely to lead to a more variable water supply and growing water demand, which is a real threat to water security in many mountain regions. Our current incomplete picture is hampering the design and implementation of effective climate change adaptation," said Dr. Drenkhan.



"A holistic perspective based on improved data and process understanding is urgently needed to guide robust, locally tailored adaptation approaches in view of increasingly adverse impacts from climate change and other human interferences.”



What is clear is that climate change will impact the availability of fresh water over the coming decades, centuries and even millennia, making serious impacts inevitable for current communities and for generations to come. Adaptation to these changes will require comprehensive data sets and an understanding of how global warming may affect the cryosphere in order to develop management strategies that enhance water security in future.&nbsp;



“Our study highlights the need for scientists to work on the ground with stakeholders. A thorough understanding of the local water security context is essential to co-produce integrated local and scientific knowledge that can support local water management decisions and adaptation strategies," concluded study senior author Professor Wouter Buytaert.



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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

Water supply from icy mountains will become less reliable

Icy mountains, with their snow, glaciers and permafrost, are important...

According to a new global quantitative study based on data collected from research articles and databases, most reservoirs of rodent-borne diseases tend to live exclusively or occasionally in or near human dwellings, show large fluctuations in their population numbers, and are often hunted by humans for their fur or meat, thus increasing the risk of new <a href="https://www.earth.com/earthpedia-articles/the-terrifying-biology-of-zoonotic-diseases/">zoonotic diseases</a> to emerge.



“Most rodents that spread zoonotic pathogens, meaning pathogens spreading between animals and humans, show large population fluctuations, move at least occasionally indoors, or are hunted for meat or fur. Our results were consistent among pathogen types, i.e., virus, bacteria, fungi, and parasites. And with transmission modes, i.e., intermediate, involvement of vectors or non-close and close contact, with close contact including inhalation of contaminated aerosols,” said study lead author Frauke Ecke, a professor of Organismal and Evolutionary Biology at the <a href="https://www.helsinki.fi/en">University of Helsinki</a> in Finland.



In order to clarify the interplay between natural and human-driven factors in the risk of pathogen transmission from animals to humans, the scientists focused on&nbsp;436 rodent species (of which 282 are well-known reservoirs of zoonotic pathogens), and investigated the linkage among the rodents’ choice of habitat, population fluctuations, humans’ hunting activities, and the status of rodents as potential reservoirs.



The analysis revealed that certain regions in the world – including large parts of Europe (especially central and northern Europe), a wide stretch of land extending from eastern Europe to eastern Asia, eastern China, parts of South America, southeast Australia, and eastern parts of North America – are at high risk of pathogen spillovers from rodents to humans. “If people encounter a rodent in these regions, there is a high risk that this rodent carries zoonotic pathogens,” Ecke warned.



Some examples of such pathogen-carrying rodents include the bank vole in Europe, the North American deer mouse, and the South American Azara’s grass mouse. These species exhibit large population fluctuations and can often live inside human dwellings.



“It is especially the large population fluctuations together with the disturbance of the rodents’ natural habitat that can explain why rodents move nearby and into human dwellings. This movement behavior is typical for so-called generalists, which are species that can cope with many different environments. These generalists are the most important reservoirs of pathogens,” Ecke concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1038/s41467-022-35273-7">Nature Communications</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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Why rodent-borne diseases spill over into humans?

According to a new global quantitative study based on data...

During the first year of the Coronavirus <a href="https://www.earth.com/news/monkeypox-is-spreading-but-unlikely-to-cause-a-pandemic/">pandemic</a>, a relatively slow but constant rate of viral mutations occurred. However, since the end of 2020, several variants characterized by a large number of mutations have emerged, exceeding by far the mutation rates observed in the first stage of the pandemic.&nbsp;



A new study led by <a href="https://english.tau.ac.il/">Tel Aviv University</a> has found that immunocompromised patients tend to develop chronic Coronavirus infections, allowing the virus to accumulate a variety of mutations, which can make it become more transmissible and able to evade prior natural or vaccine-induced immunity, as was the case of the Omicron variant.



The scientists argue that weakened antibody responses – particularly in the lower airways of chronic patients – may prevent their full recovery and drive the Coronavirus to mutate several times during lengthy infections, potentially leading to the emergence of new variants.&nbsp;



“The Coronavirus is characterized by the fact that in every population, there are people who become chronically infected. In the case of these patients, the virus remains in their body for a lengthy period of time, and they are at high risk for recurrent infection,” explained study senior author Adi Stern, an expert in viral evolution at the Tel Aviv University.&nbsp;



“In all of the cases observed so far, these were immunocompromised patients – part of their immune system is damaged and unable to function. In biological evolutionary terms, these patients constitute an ‘incubator’ for viruses and mutations – the virus persists in their body for a long time and succeeds in adapting to the immune system, by accumulating various mutations.”



By examining 27 chronic Covid-19 patients at the <a href="https://www.tasmc.org.il/sites/en/Pages/default.aspx">Tel Aviv Sourasky Medical Center</a>, Professor Stern and his colleagues found that their weakened immune systems have often created pressure for the virus to mutate. Most of these patients showed a pattern&nbsp;of apparent recovery, followed by recurring viral infection.&nbsp;



The analysis revealed that, when such a pattern of apparent recovery was observed – based on negative nasopharyngeal swabs – the virus continued to thrive in the patients’ lungs, where it accumulated several mutations before travelling back to the upper respiratory tract.



“The complexity of Coronavirus evolution is still being revealed, and this poses many challenges to the scientific community. I believe that our research has succeeded in peeling back a missing layer of the big picture, and has opened the door for further research efforts to discover the origins of the various variants. This study highlights the importance of protecting immunocompromised individuals, who are at high risk for the virus, yet may also be an incubator for the formation of the next variant, posing a risk to all of us,” Professor Stern concluded.



The study is published in the journal <a href="https://www.nature.com/articles/s41591-022-01882-4">Nature Medicine</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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Covid variants emerge from chronic patients

During the first year of the Coronavirus pandemic, a relatively...

A new study published in the <a href="http://dx.doi.org/10.1037/apl0001062">Journal of Applied Psychology</a> has found that gig workers, salespeople, and other workers who rely on volatile, fluctuating <a href="https://www.earth.com/news/income-inequality-public-less-cooperative/">income</a> often experience worse physical health outcomes, including poor sleep, headaches, stomach issues, and back pain.



“Pay volatility seems to predict worse health outcomes across a wide range of incomes,” said study author Gordon Sayre, an assistant professor of Organizational Behavior at <a href="https://em-lyon.com/">Emlyon Business School</a> in France. “Not only was pay volatility related to worse health in lower-paid tipped jobs or among freelancers in the gig economy but for higher-paid professionals working in finance, sales, and marketing, where commissions and performance bonuses are common.”



In one study, 85 U.S. workers relying on tips, such as waiters, delivery drivers, or maids, filled-in daily surveys for two weeks regarding their total daily pay and health. The analysis revealed that large fluctuations of daily pay over the study period was associated with negative health issues and poor sleep quality. This relationship was stronger when volatile pay made up a larger percentage of the workers’ total pay.



Another three-weeks study included 375 U.S. participants who spent an average of 29 hours per week working Amazon’s <a href="https://www.mturk.com/">Mechanical Turk</a>, a website where individuals have to complete a variety of tasks for minimal amounts of pay. In this case too, those with larger fluctuations in their pay experienced the worse health outcomes.



Finally, Sayre conducted a three-month online survey of 252 higher-income employees in finance, marketing, and sales who relied on commissions or bonuses for a fraction of their income. The results showed that pay volatility was less harmful to health when the participants were less reliant on commissions and bonuses.



These findings suggest that businesses should consider whether volatile forms of pay are necessary and ensure that more stable forms of compensation make up a larger part of employees’ total income.&nbsp;



“Unions are another way that workers could secure stronger protections against volatile pay. Raising the proportion of base pay and reducing dependence on volatile pay should help protect workers’ health in many industries,” Sayre concluded.



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



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Fluctuating income is detrimental to health

A new study published in the Journal of Applied Psychology...

A study led by the <a href="https://www.uga.edu/">University of Georgia</a> has found that physical activity during older age can help protect cognitive functioning. Moreover, in order to see significant improvements in <a href="https://www.earth.com/news/moderate-drinking-can-cause-premature-brain-aging/">brain</a> health, no intense physical exercise is needed. In fact, even just a few minutes of walking could have high neuroprotective benefits.



“This finding isn’t saying, ‘If you’re older, you need to go out there and start running marathons,’” said study lead author Marissa Gogniat, a recent doctoral graduate in Psychology at the University of Georgia. “This is saying if you get more steps, if you’re moving around your environment a little bit more, that can be helpful to your brain health and keep you more independent as you age.”



Dr. Gogniat and her colleagues tracked the physical activity and fitness measurements of 51 older adults, who wore a device that measured the intensity of their physical activity, the number of steps taken, and the distance they covered. The scientists assessed fitness through a six-minutes walking test, during which participants had to walk as quickly as they could. Afterwards, the participants performed tests specifically designed to measure their cognitive functioning and underwent functional MRIs to assess their brain functioning.



The researchers found that the functioning and interaction of the different neural networks that the brain consists of – which is fundamental for being able to perform basic daily tasks, such as remembering important information and exhibiting self-control – was significantly improved by physical exercise.



“This paper is exciting because it gives us some evidence that when people whose brain networks aren’t functioning optimally engage in physical activity, we see improvement in their executive function and their independence,” Dr. Gogniat explained.&nbsp;



“We’re not saying you need to radically change your life. Maybe just take the stairs on the way to work. Stand up and walk around a little bit more. That’s where you get the most bang for your buck, not crazy, high-intensity exercise.”



“We’ve always been told it’s good to exercise, but I think this is some evidence that exercise can actually change your brain. And that impacts the way you’re able to function in your daily life,” she concluded.



The study is published in the journal <a href="https://link.springer.com/article/10.1007/s11332-021-00887-9">Sport Sciences for Health</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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Even moderate exercise can improve brain health

A study led by the University of Georgia has found...

India is one of the ten most forest-rich countries in the world, with about 80.9 million hectares of trees covering it (nearly 25 percent of the entire country). However, between the 1890s and the 1990s, a combination of rapid economic development and overexploitation of resources led India losing almost 80 percent of its forest area. Now, as the country’s <a href="https://www.earth.com/news/diverse-forests-are-more-resilient-and-productive/">forests</a> continue to disappear, a team of researchers led by the <a href="https://www.osu.edu/">Ohio State University</a> has developed a deep learning algorithm that, by using satellite data, could provide real-time monthly land use and land cover maps of India.



“Our work was done in an effort to help India’s government and industries improve the country’s attempts at forest sustainability,” said study lead author Ying Zuo, a graduate student in Earth Sciences at OSU.



This land monitoring system was trained by using data from <a href="https://www.norad.no/en/front/thematic-areas/climate-change-and-environment/norways-international-climate-and-forest-initiative-nicfi/">Norway’s International Climate and Forests Initiative</a> (NICFI), an enterprise of the Norwegian government aiming to reduce the destruction of tropical forests by providing high-resolution satellite images of the tropics. By combining this data with a global land cover map produced by <a href="https://www.tsinghua.edu.cn/en/">Tsinghua University</a> in China, the deep learning algorithm was able to develop more detailed maps of Indian forests.



“In an effort to combine two datasets into the same system, we resampled them into the same spatial resolution and aligned each pixel to create an image-labeled paired training dataset,” Zuo explained. “The process helps us to assimilate the two datasets so they can be used to train our deep learning model.”&nbsp;



After training the model through these methods, the scientists processed ten base monthly maps of the area, from January to October 2022. These maps allowed researchers to detect seasonal shifts across India, including changes to barren land, the way monsoons affected crop land, and the distribution of forests in mountainous regions.



The experts concluded that it is vital for ecologists to more comprehensively investigate the seasonal impact of monsoons on India’s forest cover. “As the average temperature of our Earth increases, natural hazards will become a lot more frequent, so having these maps at our disposal benefits everyone’s understanding of how this problem affects life on Earth,” Zuo said.



In future research, the scientists aim to expand the timespan of these base maps over several years instead of just a few months to study other annual changes around the world, such as the effects of floods on forests.



“The characteristics of local forests and their surrounding habitats might likely be different in other regions. But with the help of more detailed datasets, our work could easily be used in areas of the world where detecting and alerting the public to forest degradation and its side effects need to become a priority,” Zuo concluded.



The study was presented at the annual meeting of the <a href="https://www.agu.org/Fall-Meeting">American Geophysical Union</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



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.

Deep learning can help track changes in forest cover

India is one of the ten most forest-rich countries in...

Each year, nearly eight million <a href="https://www.earth.com/news/environmentally-friendly-christmas-tree/">Christmas trees</a> are sold in the United Kingdom, with an estimated seven million ending up in landfills after the holidays. Besides being costly, once in a landfill, each tree will release 16 kg of greenhouse gases as it decomposes, producing methane, which is 25 times more potent than carbon dioxide. 



However, a new study led by the <a href="https://www.sheffield.ac.uk/">University of Sheffield</a> and the <a href="https://universityofvalladolid.uva.es/">University of Valladolid</a> has found that pine needles from discarded Christmas trees could be turned into renewable fuels and other products that could be used as food preservatives or in agricultural and industrial manufacturing.



In previous studies, researchers have argued that pine needles could be processed with the aid of heat and solvents, breaking them down into a liquid product (bio-oil) - that could be used in the production of sweeteners, pain, adhesives and vinegar – and a solid by-product (bio-char), which could be used in other industrial processes.



Building upon this research, the new study showed that pine needles could also help producing formic acid, which could be used in hydrogen fuel cells, as well as a food preservative and a critical ingredient in agriculture and industry.



“One of the things that we do when reacting carbon dioxide to capture CO2 is to use a metal to promote the reaction. This can be inefficient and expensive, so we went back to some of the work we’ve done previously with pine needles, because we realized that we could potentially use these to promote turning the carbon dioxide into formic acid,” explained study co-author James McGregor, a senior lecturer in Chemical Engineering at Sheffield.



“We found that instead of the metal and the carbon dioxide reacting, we could react carbon dioxide with pine needles and water at high temperatures and a fraction of the pine needles would turn into the same product as the CO2,” added lead author María Andérez-Fernández, a doctoral student at the University of Valladolid.



“Carbon dioxide is introduced as sodium bicarbonate, commonly known as baking soda or bicarbonate of soda. This co-conversion with captured carbon dioxide, that we didn’t have before in the previous pine needles research, has found that the two things enhance the conversion of each other, making it more efficient and in this case, making more of the end product - formic acid.”



According to the scientists, formic acid has many applications. For instance, it can be used in fuel cells to store and transport hydrogen, which can then be employed as renewable energy source. In addition, it can also play an important role as a food preservative or antibacterial agent in livestock feed, or can be used in the manufacture of leather and rubble.



If pine needles were collected and processed in this way, the chemicals obtained would replace less sustainable industrial chemicals, leading to a decrease in the UK’s carbon footprint and amount of biomass waste ending up in landfills, and potentially saving up to 100,000 tons of greenhouse gases that are currently released every year by landfilled Christmas trees.



The study is published in the journal <a href="https://doi.org/10.1021/acssuschemeng.2c06218">ACS Sustainable Chemistry &amp; Engineering</a>.



—



By Andrei Ionescu, Earth.com Staff Writer



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

Old Christmas trees could be used to produce fuels

Each year, nearly eight million Christmas trees are sold in...

The benefits of regular physical exercise have long been recognized. According to the Centers for Disease Control and Prevention, physical activity can improve your&nbsp;brain health, help&nbsp;manage weight, reduce the&nbsp;risk of <a href="https://www.earth.com/news/links-between-climate-and-heart-disease-must-be-addressed/">disease</a>, strengthen&nbsp;bones and muscles, and improve your ability to do&nbsp;everyday activities. In addition, regular exercise reduces your overall risk of dying prematurely.&nbsp;



Physical activity is such an important aspect of keeping ourselves healthy that the US Department of Health and Human Services issued&nbsp;<a href="https://jamanetwork.com/journals/jama/article-abstract/2712935">Physical Activity Guidelines for Americans</a>&nbsp;in 2018. They recommended that adults engage in at least 150-300 minutes/week of moderate physical activity or 75-150 minutes/week of vigorous physical activity, or an equivalent combination of both intensities. The <a href="https://www.heart.org/">American Heart Association</a> followed suit, recommending at least 150 minutes per week of moderate-intensity aerobic exercise or at least 75 minutes per week or vigorous aerobic exercise, or a combination of both.



Previous studies have often used a single measurement of a person’s level of physical exercise on which to base statistical analyses and research outcomes. And despite the well-known advantages of regular exercise, it remains unclear whether it is beneficial or harmful to do more long-term moderate or vigorous exercise than is currently recommended. New research, published in the American Heart Association’s flagship, peer-reviewed journal&nbsp;<a href="https://www.ahajournals.org/journal/circ">Circulation</a>, has now investigated this question, making use of over 110,000 participants and a study that lasted 30 years.&nbsp;



Study lead author Dong Hoon Lee is a research associate in the Department of Nutrition at the Harvard T.H. Chan School of Public Health in Boston. &nbsp;



“The potential impact of physical activity on health is great, yet it remains unclear whether engaging in high levels of prolonged, vigorous or moderate intensity physical activity, above the recommended levels, provides any additional benefits or harmful effects on cardiovascular health,” said Lee. “Our study leveraged repeated measures of self-reported physical activity over decades to examine the association between long-term physical activity during middle and late adulthood, and mortality.”



The researchers analyzed medical data and mortality records from 116,221 people who had participated in two large prospective studies, the Nurses’ Health Study and the Health Professionals Follow-up Study. In the study, 63 percent of participants were female, and more than 96 percent were white adults. The individuals had an average age of 66 years and an average body mass index (BMI) of 26 kg/m2&nbsp;over the 30-year follow-up period. During this time, the researchers documented a total of 47,596 deaths.



Participants were asked to complete questionnaires at enrollment - and then every two years - on demographic, lifestyle, and medical history information. The questionnaires included questions about health, physician-diagnosed illnesses, family medical histories and personal habits such as cigarette and alcohol consumption and frequency of exercise. &nbsp;Exercise data was reported as the average time spent per week on various physical activities over the past year.&nbsp;



Moderate exercise included activities carried out at a less energetic level, such as walking, and lower-intensity swimming, weightlifting, calisthenics and working outdoors. Vigorous activities included more energetic aerobic exercises such as jogging, running, swimming, bicycling and even climbing stairs.



The results of the analysis supported the guidelines established by the CDC and followed by the Department of Health and Human Services. Adults who met the guidelines for weekly vigorous physical activity had a 19 percent lower risk of dying overall, and a 31 percent lower risk of dying from cardiovascular disease (CVD) in particular. Adults who met the guidelines for weekly moderate exercise levels had a 20–21 percent lower risk of death overall, and a 22–25 percent lower risk of dying from CVD in particular.&nbsp;



However, the most striking results pertain to those participants who performed more than double the currently recommended minimum levels of either vigorous or moderate exercise. They had the lowest long-term risk of premature death.&nbsp;&nbsp;



<ul><li>Participants who performed two to four times above the recommended amount of long-term vigorous physical activity (150-300 min/week) had an observed 27–33 percent lower risk of CVD mortality and an overall 21–23 percent lower risk of death from all causes.</li><li>Participants who performed two to four times above the recommended amount of moderate physical activity (300-600 min/week) had an observed 28–38 percent lower risk of CVD mortality and an overall 26–31 percent lower risk of mortality from all causes.</li></ul>



In addition, no harmful cardiovascular health effects were found among the adults who reported engaging in more than four times the recommended minimum activity levels.&nbsp; Previous studies have found evidence that long-term, high-intensity, endurance exercise, such as marathons, triathlons and long-distance bicycle races, may increase the risk of adverse cardiovascular events, including myocardial fibrosis, coronary artery calcification, atrial fibrillation and sudden cardiac death.



“This finding may reduce the concerns around the potential harmful effect of engaging in high levels of physical activity observed in several previous studies,” Lee noted. However, the study also found that engaging in long-term vigorous or moderate physical activity at more than four times the recommended weekly levels did not provide any additional reduction in the risk of death.



“Our study provides evidence to guide individuals to choose the right amount and intensity of physical activity over their lifetime to maintain their overall health,” said Lee. "Our findings support the current national physical activity guidelines and further suggest that the maximum benefits may be achieved by performing medium to high levels of either moderate or vigorous activity or a combination.”



The study highlighted that people who did less than 75 minutes of vigorous activity, or less than 150 minutes of moderate activity, every week over the long term had the greatest risk of premature death. Lee noted that this segment of the current population would benefit most from introducing 75–150 minutes of vigorous physical activity or 150–300 minutes of moderate activity (or an equivalent combination of both) into their weekly routines over the long term.&nbsp;&nbsp;



Donna K. Arnett is a past president of the American Heart Association (2012-2013) and the dean and a professor in the Department of Epidemiology at the University of Kentucky College of Public Health in Lexington, Kentucky. Arnett served as co-chair of the writing committee for&nbsp;the American Heart Association’s 2019 Guideline on the Primary Prevention of Cardiovascular Disease, but was not involved in the current study.&nbsp;



“We have known for a long time that moderate and intense levels of physical exercise can reduce a person’s risk of both atherosclerotic cardiovascular disease and mortality,” said Arnett.&nbsp;



“We have also seen that getting more than 300 minutes of moderate-intensity aerobic physical activity or more than 150 minutes of vigorous-intensity aerobic physical exercise each week may reduce a person’s risk of atherosclerotic cardiovascular disease even further, so it makes sense that getting those extra minutes of exercise may also decrease mortality.”



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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

How much exercise reduces the risk of premature death?

The benefits of regular physical exercise have long been recognized....

Tired,Man,Using,Laptop,At,The,Office,Or,Home

With the worries accompanying the Covid-19 pandemic, the war in Ukraine, the pressures of inflation and various other life stressors, many people worldwide are feeling at the end of their tether. For some, the cumulative effect of these prolonged periods of stress can result in <a href="https://www.earth.com/news/burnout-job-saliva/">burnout</a> – a more severe state than normal tiredness, characterized by constant exhaustion, emotional numbness and confusion at home and in the workplace.



While some conventional tools used to diagnose this phenomenon usually focus on work-related stress, the impact of burnout is much more extensive, according to Gordon Parker, a psychiatrist at the <a href="https://www.unsw.edu.au/">University of New South Wales</a> in Australia and founder of the <a href="https://www.blackdoginstitute.org.au/">Black Dog Institute</a>, an organization conducting research into mood disorders and aiming to remove the social stigmas surrounding mental illness.



“Most people think that burnout is a work problem. Actually, we found that stress experienced at work or at home can set the wheels of burnout in motion,” Parker explained. “Our&nbsp;analyses&nbsp;indicated that burnout may also develop as a result of predisposing personality traits, especially perfectionism. People with perfectionistic traits are usually excellent workers, as they’re extremely reliable and conscientious. However, they’re also prone to burnout as they set unrealistic and unrelenting standards for their own performance, which are ultimately impossible to live up to.”



In his recently published book <a href="https://www.amazon.com/Burnout-identifying-burnout-pathways-recovery-ebook/dp/B09195F4DP">Burnout: A Guide to Identifying Burnout and Pathways to Recovery</a> – written together with Gabriela Tavella and Kerrie Eyers - Parker identifies and explains sources and possible coping strategies to minimize the impact of stress. The book contains new evidence-based tools for readers to assess their psychological state and generate plans for recovery based on their personal situation. Each chapter helps readers recognize their own burnout patterns, while providing approaches to help them regain their passions and build their resilience against the myriad stressors from their daily lives.



—



By Andrei Ionescu, Earth.com Staff Writer



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

Perfectionists are more likely to develop burnout

With the worries accompanying the Covid-19 pandemic, the war in...

Water pollution caused by the rapid development of the chemical industry is currently a major problem worldwide, making scientists struggle to develop various <a href="https://www.earth.com/news/breakthrough-technology-uses-sunlight-to-purify-water/">water purification</a> technologies and materials. However, carbon-based porous materials using existing adsorption mechanisms have significant limitations, since the adsorption rate is slow and high thermal energy is needed for recycling. Although experts have developed a variety of materials to improve contaminant removal efficiency, it has been extremely difficult to construct materials that simultaneously satisfy excellent recyclability, high efficiency, economic efficiency of raw materials, and industrialization potential.



Now, a team of researchers led by the <a href="https://www.dgist.ac.kr/en/">Daegu Gyeongbuk Institute of Science and Technology</a> (DGIST) in South Korea has successfully developed an “atypical porous polymer material,” which can completely remove phenolic organic contaminants in water at extremely high speeds. This material can efficiently remove not only microplastics, but also small-sized volatile organic compounds (VOCs). Moreover, scientists expect it to be utilized as a high-efficiency adsorption material which can be commercialized widely due to the low costs of its raw materials and the fact that it uses solar power in the water purification process.



Several experiments confirmed that this polymer does not require high thermal energy for recycling and can be used multiple times without loss of performance. Since the material has the capacity to absorb light broadly and convert it into heat, the researchers were able to produce a water treatment membrane that can evaporate water using solar energy.



“The technology we developed here is an unrivaled water purification technology with the world’s highest purification efficiency, removing more than 99.9 percent of phenolic microplastics and VOC contaminants in water at ultra-high speeds,” said study senior author Chiyoung Park, an expert in Energy Science and Engineering at DGIST. “We expected that it will be a universal technology with high economic efficiency that can purify contaminated water and supply drinking water even in areas where there is no power supply.”



The study is published in the journal <a href="https://doi.org/10.1002/adma.202206982">Advanced Materials</a>.



—



By Andrei Ionescu, Earth.com Staff Writer



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

Scientists develop an eco-friendly material to purify water

Water pollution caused by the rapid development of the chemical...

On Friday, December 30, 2022, the Biden administration imposed a new rule expanding the definition of <a href="https://www.earth.com/news/quality-waterways-changes-season/">waterways</a> that the <a href="https://www.epa.gov/">U.S. Environmental Protection Agency</a> (EPA) has authority to regulate. This important move reverses a Trump-era change, while seeking to overcome almost a decade of challenges to EPA powers and to strike a balance aiming to protect both waterways and commerce.



In 2015, the Obama administration significantly and controversially widened the scope of the Clean Water Act – a landmark 1972 law aiming to gradually improve the health of polluted and degraded rivers and lakes – to cover even ephemeral streams and ponds. After four years, the Trump administration dramatically weakened EPA’s water pollution authority with a rule of its own that sparked major debates among environmentalists.



Now, in broadening once more EPA’s powers - by covering “traditional navigable waters,” including interstate waterways and upstream water sources which impact the health and quality of those waterways - the agency hopes “to deliver a durable definition of WOTUS [“Waters of the United States”] that safeguards our nation’s waters, strengthens economic opportunity, and protects people’s health while providing greater certainty for farmers, ranchers, and landowners,” as EPA administrator Michael Regan put it.



According to environmental scientists and activists, this change is central to restore the health of impaired waterways and fragile wildlife habitats, since it gives federal and state governments the authority to significantly limit the flow of water pollutants, including industrial effluents, livestock waste, and construction runoff.



“The rule’s clear and supportable definition of waters of the United States will allow for more efficient and effective implementation and provide the clarity long desired by farmers, industry, environmental organizations, and other stakeholders,” said Michael L. Connor, the U.S. Army’s assistant secretary for civil works.



However, the new rule has already drawn a significant amount of criticism too, particularly from the U.S. Chamber of Commerce – which argued that the rule would only add to regulatory uncertainty and unpredictability, and could hinder the planning and construction of major government-funded infrastructures – as well as by several Republican officials claiming that the rule will unfairly burden farmers, miners, ranchers, infrastructure builders, and landowners.



—



By Andrei Ionescu, Earth.com Staff Writer



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

Biden administration broadens protection for U.S. waterways

On Friday, December 30, 2022, the Biden administration imposed a...

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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

[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



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

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



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



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



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



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



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



Video/ Image Credit: European Space Agency&nbsp;



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



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

Kainji Lake in north central Nigeria

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



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



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



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



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



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



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



Video Credit: Amanda Nguyen/University of Illinois



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



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

Designing crops that can beat the heat

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



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



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



Video Credit: ACS Reactions



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



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

[sendtonews key="oL4FnPTGCV-2384527-12187" 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.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

[sendtonews key="f8fukm28Vz-2491833-12187" type="single"] Today's Video of the Day from NASA...

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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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Earth,Like,Exoplanet,3d,Render

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

[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...