Exercise is well known for its broad health benefits, from strengthening muscles and bones to supporting heart and immune health. Now, a team of engineers from MIT has uncovered a new benefit: exercise can directly promote neuron growth.



Led by <a href="https://www.mit.edu/" target="_blank" rel="noreferrer noopener">MIT</a>’s Ritu Raman, a recent study shows that contracting <a href="https://www.earth.com/news/muscles-defy-aging-with-remarkable-resilience/" target="_blank" rel="noreferrer noopener">muscles</a> release biochemical signals, or myokines, which significantly enhance neuron growth.&nbsp;



When neurons were exposed to these muscle-generated signals, they grew four times farther than those without exposure. This discovery could pave the way for new therapies focused on nerve repair and regeneration.



<h2 class="wp-block-heading" id="h-muscle-nerve-communication">Muscle-nerve communication</h2>



This study provides the first evidence that physical activity itself can stimulate <a href="https://www.earth.com/news/scientists-find-a-way-to-regenerate-old-neurons/" target="_blank" rel="noreferrer noopener">neuron growth</a> as effectively as biochemical signals from muscles.&nbsp;



While prior research hinted at a connection between muscles and nerve growth, MIT’s study goes further, revealing the powerful role both biochemical and physical effects play.&nbsp;



The research, published in <a href="https://doi.org/10.1002/adhm.202403712" target="_blank" rel="noreferrer noopener">Advanced Healthcare Materials</a>, highlights the essential link between muscle and nerve health and could have applications for therapies aimed at restoring nerve function.



“Now that we know this muscle-nerve crosstalk exists, it can be useful for treating things like nerve injury, where communication between nerve and muscle is cut off,” said Raman, an assistant professor of mechanical engineering at MIT.&nbsp;



“Maybe if we stimulate the muscle, we could encourage the nerve to heal, and restore mobility to those who have lost it due to traumatic injury or neurodegenerative diseases.”



<h2 class="wp-block-heading" id="h-muscles-influence-nerve-growth">Muscles influence nerve growth</h2>



In previous work, Raman’s team helped restore mobility in mice with traumatic muscle injuries by implanting new muscle tissue at the site of the injury and then stimulating it with light.&nbsp;



Over time, this exercised muscle tissue produced certain biochemicals that promoted blood vessel and nerve growth, restoring function in injured areas. 



This finding suggested muscles could influence nerve growth, and it led Raman’s team to explore whether muscle-generated signals might directly support nerve growth.



To isolate muscle responses, they engineered mouse muscle tissue that would contract when exposed to light. 



Using a special gel mat that supports muscle tissue without detachment, the team stimulated muscle contractions, allowing the tissue to release a blend of myokines - biochemical messengers including proteins and RNA.



“Muscles are pretty much always secreting myokines, but when you exercise them, they make more,” Raman explained. After collecting this solution, the team introduced it to motor neurons to observe how they might respond.



<h2 class="wp-block-heading" id="h-biochemical-signals-and-neuron-growth">Biochemical signals and neuron growth</h2>



The team applied the myokine solution to motor neurons derived from mouse stem cells. 



Observing their behavior, the experts found that the neurons quickly extended, growing four times faster and farther than those not exposed to myokines.



“They grow much farther and faster, and the effect is pretty immediate,” Raman said.



A closer genetic analysis of the neurons showed that the myokines stimulated genes not only related to growth but also to neuronal maturation and function.



“We saw that many of the genes up-regulated in the exercise-stimulated neurons were not only related to neuron growth, but also neuron maturation, how well they talk to muscles and other nerves, and how mature the axons are,” Raman explained.&nbsp;



“Exercise seems to impact not just neuron growth but also how mature and well-functioning they are.”



<h2 class="wp-block-heading" id="h-physical-movement-alone-promotes-growth">Physical movement alone promotes growth</h2>



The researchers next wondered if neurons could respond similarly to exercise’s mechanical impacts without biochemical cues.&nbsp;



“Neurons are physically attached to muscles, so they are also stretching and moving with the muscle,” Raman said.&nbsp;



Using a gel mat embedded with tiny magnets, the team simulated mechanical stretching on a different set of neurons, “exercising” them by gently moving the mat back and forth.



Remarkably, this mechanical stimulation resulted in neuron growth similar to that induced by myokines. The findings suggest that exercise’s <a href="https://www.earth.com/news/exercise-in-a-pill-is-now-closer-to-reality/" target="_blank" rel="noreferrer noopener">physical impacts</a> may directly encourage neuron growth. 



“That’s a good sign because it tells us both biochemical and physical effects of exercise are equally important,” Raman said.



<h2 class="wp-block-heading" id="h-implications-for-restoring-mobility">Implications for restoring mobility</h2>



This breakthrough in understanding how muscles influence neurons opens new therapeutic possibilities for nerve repair and <a href="https://www.earth.com/news/coffee-grounds-could-help-prevent-neurodegenerative-diseases/" target="_blank" rel="noreferrer noopener">neurodegenerative conditions</a>.&nbsp;



By using targeted muscle stimulation, researchers hope to develop treatments for conditions such as ALS and other neurodegenerative diseases that affect nerve function. 



“This is just our first step toward understanding and controlling exercise as medicine,” Raman said.



With growing evidence that exercise supports nerve health on multiple levels, researchers are now focused on exploring the potential for exercise-based therapies to restore function and mobility for those affected by nerve damage or degeneration.&nbsp;



These findings highlight the powerful role exercise could play in future neurotherapeutic approaches.



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Exercise fuels neuron growth through muscle signals

Exercise is well known for its broad health benefits, from strengthening muscles and bones to supporting heart and immune health. Now, a team of engineers from MIT has uncovered a new benefit: exercise can directly promote neuron growth. Led by MIT’s Ritu Raman, a recent study shows that contracting muscles release biochemical signals, or myokines, which significantly enhance neuron growth.&nbsp; When neurons were exposed to these muscle-generated signals, they grew four times farther than those without exposure. This discovery could pave the way for new therapies focused...

Almost half of the world’s population lives in areas at risk for dengue fever – a mosquito-borne infectious disease caused by the dengue virus. Currently, dengue is considered a major public health problem in Sri Lanka. Since it is difficult to develop safe and effective vaccines against this virus, controlling mosquito populations is considered the most effective strategy for preventing the spread of the <a href="https://www.earth.com/news/soil-pollution-has-been-linked-to-heart-disease/">disease</a>. 



An international team of scientists has now found that increases in three climate factors – rainfall, temperatures, and ocean warming – can reliably predict mosquito population growth in Sri Lanka, and thus provide opportunities to issue early warnings on the prevalence of the insects for the entire dengue season.



In Sri Lanka, dengue transmission patterns closely follow the country’s monsoonal rainfalls, with a peak in July following the southwest monsoon, and another one in December-January, after the northeast monsoon. While scientists have long known that there is a relationship between climate variables and the abundance, feeding patterns, and lifespan of Aedes mosquitoes – the primary vector that transmits the disease – the precise relation between the climate and insect activity is still poorly understood.



“Dengue transmission is expected to intensify due to climate change. If we can use climate and weather data to predict seasonal patterns of mosquitos, this timely information would allow public health authorities to proactively manage mosquito control operations,” said study co-author Yesim Tozan, an assistant professor of Global Health at <a href="https://www.nyu.edu/">New York University</a> (NYU).



In order to quantify the effects of climate on Aedes mosquitoes in Kalutara, a district in Sri Lanka with a high prevalence of dengue, the scientists measured three monthly weather variables – rainfall, temperatures, and Oceanic Niño Index (which shows the degree of ocean warming) - from 2010 to 2018, and compared them with surveillance data of mosquito prevalence in Kalutara. They found that all three climate variables predicted mosquito activity, but with different time lags.



While an increase in rainfall - which frequently leads to outdoor containers filling with water and creating breeding sites - predicted a greater prevalence of mosquitoes within the same month, warmer temperatures were associated with increases in populations of these insects one or two months later. In addition, higher ocean temperatures caused by El Niño&nbsp;predicted increases in mosquito abundance with a five to six months delay.



“These climate factors have the potential to serve as predictors of mosquito activity at different times and may enable us to quantify the risk and implement effective mosquito control interventions before a dengue epidemic emerges,” said study lead author Prasad Liyanage, who conducted the research during his doctoral studies in Epidemiology and Global Health at <a href="https://www.umu.se/en/">Umeå University</a>.



“Tracking El Niño events has the added advantage of predicting the seasonal prevalence of&nbsp;Aedes&nbsp;mosquitoes with a lead time of six months, which could provide opportunities to issue early warnings on mosquito prevalence for the entire dengue season,” concluded Professor Tozan.



The study is published in the journal <a href="https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(22)00143-7/fulltext#%20">The Lancet Planetary Health</a>.&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&nbsp;&nbsp;

Climate variables can predict future mosquito activity

Almost half of the world’s population lives in areas at...

Whether <a href="https://www.earth.com/news/scientists-have-found-a-terrifying-decline-in-flying-insects/">insects</a> feel pain or not has been a matter of heated scientific debate for decades. According to a new study led by <a href="https://www.qmul.ac.uk/">Queen Mary University</a> in London, insects most likely have central nervous system control of nociception (the ability to detect potentially or actually damaging stimuli), which would make it plausible that they can experience pain. These findings suggest that insects should be included in animal welfare protection lists, particularly as insect farming ramps up.



Nociception is the detection of painful stimuli and is often accompanied by subjective feelings of pain which allows animals to adapt their behavior in a variety of potentially dangerous contexts. In mammals, the modulation of nociception is executed by neurons in the brain – a phenomenon known as “the descending control of nociception.”



“For example, if an animal is injured during a fight, the dampening of their nociceptive processing may increase the animal’s fighting performance by ensuring they do not waste time or energy on responding to the injury,” the study authors explained. “Likewise, when the animal has returned to safety, the descending controls can facilitate nociceptive processing, encouraging the animal to protect the injured location so that its healing is promoted.”



Until recently, few studies have investigated whether this descending control is present in insect species too. By analyzing previous molecular, behavioral, and anatomical evidence in the case of various types of insects, the scientists discovered that, similarly to mammals, they also have evolved descending controls for nociception.&nbsp;



“Behaviorally, changes to the insect brain can change their nocifensive behavior, whether this change is physical manipulation or the processing of motivational stimuli,” the researchers wrote. “Anatomically, insects have descending neuronal projections from the brain to the ventral nerve cord, where nocifensive behavior is executed.”



Although there is no direct way to measure the subjective experience of pain in any animal species, the discovery of brain controls for nociception in insects makes it plausible that they have in fact painful experiences. “Descending control of nociception in humans can also affect pain perception, so it could be argued that pain is also affected in non-verbal animals,” said study senior author Lars Chittka, a zoologist at the Queen Mary University.



“This is certainly the accepted argument for mammals such as mice, where a reduction in nociceptive behavior is accepted as equaling a reduction in pain. This is important in terms of ethics, as insects are subjected to potentially-painful stimuli in research and farming,” he concluded.



The study is published in the journal <a href="https://royalsocietypublishing.org/doi/10.1098/rspb.2022.0599">Proceedings of the Royal Society B: Biological Sciences</a>.&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&nbsp;&nbsp;&nbsp;

Insects may be able to experience pain

Whether insects feel pain or not has been a matter...

Alaska, also known as America's final frontier, attracts many visitors. Some come for the wolves, and others for the grizzlies. According to a new study published in <a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0268594">PLoS ONE</a>, nearly 300,000 birdwatchers flock to Alaska each year for a chance to get a glimpse of rare birds.&nbsp;



Regardless of any economic benefits, birds deserve our protection. At the same time, however, the fact that birdwatching boosted Alaska's economy by about $378 million in 2016 could certainly motivate conservation efforts.&nbsp;



The researchers found that In 2016, birdwatching created 4,300 jobs in Alaska. Although those working in the birding industry did not make as much money, the number of jobs created is comparable to those in the mining and telecommunications industries.&nbsp;



"Once you have visitors who are coming to Alaska spending money on viewing rare species that our surroundings provide the critical habitat for on a global scale, it becomes an incentive to keep that habitat high quality for birds," explained study lead author Tobias Schwoerer of the UAF <a href="https://uaf-iarc.org/">International Arctic Research Center</a>.



Also, since birders are more likely to visit remote places, the money gets spread further than in other money-making industries; rural areas, in particular, seem to benefit.&nbsp;



"Independent travelers are more likely to take a flight out to the Pribilofs, or go to the Aleutians to see an exotic species they can't find elsewhere, or book a trip with a small operator who drives Sprinter vans from Fairbanks to Prudhoe Bay," said Schwoerer.



The study used visitor exit surveys to determine how many birders visited the state. Schwoerer incorporated the visitor statistics into a computer model to show how birdwatchers' spending spreads through the economy.



"This study gives us a glimpse of how diverse our state's tourism is and can be in the future, as well as how intertwined our communities are with visitors in the shared experience of marveling at the wonders of birds," said Natalie Dawson.



"Sustainable and well-managed birdwatching is a growth sector. Birdwatching in Alaska is a type of tourism where Alaskans can capitalize on the region's intact lands and waters," said David Krause of Audubon Alaska. "It's an exciting place of opportunity that protects irreplaceable and fragile ecosystems while supporting jobs."



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

Birdwatching boosts Alaska's economy by hundreds of millions

Alaska, also known as America's final frontier, attracts many visitors....

Geckos are known for their grippy feet which allow them to scale vertical surfaces. This superpower comes from millions of microscopic, hairlike structures on their toes. Scientists already understood gecko adhesion, but now have a clearer picture of the molecular structures that give the <a href="https://www.earth.com/news/pipeline-installation-boosts-diversity-of-seafloor-animals/">animal</a> its grip.&nbsp;



In a study from the <a href="https://www.nist.gov/">National Institute of Standards and Technology</a> (NIST), researchers analyzed the setae by zooming in using X-rays called a synchrotron. The experts discovered that the structures are coated in an ultra-thin film of water-repelling lipid molecules.



Setae are flexible and assume the microscopic contours of any surface the gecko is climbing. To release its foot, the gecko changes the angle of the setae, interrupting those forces and allowing the animal to take its next step.&nbsp;



These lipids are hydrophobic, meaning they repel water. “The lipids might function to push away any water beneath the spatulae, allowing them to make closer contact with the surface,” said study co-author Tobias Weidner of Aarhus University in Denmark. “This would help geckos maintain their grip on wet surfaces.”



The setae are made of a keratin protein similar to that found in human hair and fingernails which are extremely delicate. These keratin fibers are aligned in the direction of the setae, which might help them resist abrasion.



“You can imagine gecko boots that don’t slip on wet surfaces, or gecko gloves for holding tools that are wet,” said NIST physicist and study co-author Dan Fischer. “Or a vehicle that can run up walls, or a robot that can run along power lines and inspect them.”



The NIST synchrotron microscope can uniquely identify molecules on the surface of a three-dimensional object, measure their orientation and map their position. It is located at the U.S. Department of Energy’s Brookhaven National Laboratory, where the National Synchrotron Light Source II provides a source of high-energy X-rays for illumination.&nbsp;



This microscope is typically used on advanced industrial materials, including batteries, semiconductors, solar panels and medical devices. “But it is fascinating to figure out how gecko feet work, and we can learn a lot from nature when it comes to improving our own technology," said Fischer.&nbsp;



“A lot was already known about how setae work mechanically,” said study co-author Cherno Jaye. “Now we have a better understanding of how they work in terms of their molecular structure.”&nbsp;



Geckos have inspired many products like adhesive tapes. Understanding the molecular features of setae could further inspire inventors to mimic nature in design, a concept called biomimicry.



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

What gives gecko feet their grip?

Geckos are known for their grippy feet which allow them...

The word "hangry"’ is one of the most recent additions to the Oxford English Dictionary. It is defined as being irritable or bad tempered as a result of feeling <a href="https://www.earth.com/news/overfishing-is-wiping-out-large-bodied-fish-in-the-amazon/">hungry</a>, and has come into popular use in everyday language in the past few years. Despite this, the phenomenon has not been explored scientifically outside of laboratory conditions.



A new study published in the journal&nbsp;<a href="https://journals.plos.org/plosone/">PLOS ONE</a> is the first to investigate how hunger affects people’s emotions in their daily lives. The research, led by academics from <a href="https://aru.ac.uk/">Anglia Ruskin University</a> (ARU) in the UK and the Karl Landsteiner University of Health Sciences in Austria, involved 64 adult participants from central Europe who recorded their feelings and levels of hunger on a smartphone app, five times a day for 21 days. This meant that data collection took place in the participants’ homes and workplaces and reflected the link between hunger and emotional wellbeing in a natural environment.



“Many of us are aware that being hungry can influence our emotions, but surprisingly little scientific research has focused on being ‘hangry.' Ours is the first study to examine being ‘hangry’ outside of a lab. By following people in their day-to-day lives, we found that hunger was related to levels of anger, irritability, and pleasure," explained study lead author Professor <a href="https://aru.ac.uk/people/viren-swami">Viren Swami</a>.



The results of the research show that people who are hungry are more likely to feel angry and irritable, and also to experience less pleasure from their daily lives. The effects of hunger were substantial, even after the researchers took into account demographic factors such as age and sex, body mass index, dietary behavior and individual personality traits.&nbsp;



Being hungry explained 37 percent of the variance in irritability, 34 percent of the variance in anger and 38 percent of the variance in pleasure recorded by the participants. The research also found that the negative emotions – irritability, anger, and unpleasantness – are related to both day-to-day fluctuations in hunger, and to residual levels of hunger, measured using averages over the three-week period.



“Although our study doesn’t present ways to mitigate negative hunger-induced emotions, research suggests that being able to label an emotion can help people to regulate it, such as by recognizing that we feel angry simply because we are hungry,” explained Swami. “Therefore, greater awareness of being ‘hangry’ could reduce the likelihood that hunger results in negative emotions and behaviors in individuals.”



The field work for the study was carried out by Stefan Stieger, Professor of Psychology at Karl Landsteiner University of Health Sciences. Professor Stieger said: “This ‘hangry’ effect hasn’t been analyzed in detail, so we chose a field-based approach where participants were invited to respond to prompts to complete brief surveys on an app. They were sent these prompts five times a day at semi-random occasions over a three-week period.”



“This allowed us to generate intensive longitudinal data in a manner not possible with traditional laboratory-based research,” he added. “Although this approach requires a great deal of effort – not only for participants but also for researchers in designing such studies – the results provide a high degree of generalizability compared to laboratory studies, giving us a much more complete picture of how people experience the emotional outcomes of hunger in their everyday lives.”



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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

People become "hangry" when their blood sugar is low

The word "hangry"’ is one of the most recent additions...

Wolves are iconic symbols of the wild; perhaps that is why some people love them while others despise them. A new study published in <a href="https://www.frontiersin.org/articles/10.3389/fcosc.2022.881483/full">Frontiers in Conservation Science</a> demonstrates that the common reason for hating these animals is baseless and that loving them for utilitarian reasons is also unfounded.&nbsp;



“Based on the currently available evidence (not just from the United States) large predators, despite their ability to kill ungulates and livestock, will not eliminate deer, threaten people or lead to intolerable losses of livestock – the myths," explained the researchers. "On the other hand, large predators are unlikely to right all wrongs humans have inflicted on ecosystems – the wishful thinking.”



“I was as fooled like everybody else by the lovely stories that came out of Yellowstone saying, you bring wolves back, and you restore the rivers, and everything’s hunky-dory," said study co-author Professor Bernd Blossey of <a href="https://www.cornell.edu/">Cornell University</a>. "Once I started digging like an archaeologist into the literature, I found things that were not supportive of what I thought I knew.”



Professor Blossey explained that predators still have a place on the land, “The hopes and fears that we have on both sides of the debate – neither are realized. That doesn’t mean we shouldn’t allow the wolves, the mountain lions, to return to their traditional landscapes – they’re a part of it.”



When the United States took wolves off the endangered species list, many individuals, organizations, and even state governments claimed that wolves needed to die to safeguard hunting and ranching operations. The study authors note that wolves and other predators do not threaten the most commonly hunted ungulates.&nbsp;



“What we do to landscapes, whether that’s forestry, agriculture or gardening, provide deer with a perfect landscape for them to live in. Hunters don’t remove enough deer, cars don’t remove enough," said Blossey. "Their populations exploded, because the living conditions were just absolutely wonderful.”



As far as ranching is concerned, several factors lead to the loss of livestock, including lighting strikes, extreme temperatures, disease, inadequate husbandry, and poor foraging options. Moreover, there are simple steps that ranchers can take to safeguard livestock from wild predators like wolves.



The researchers want us to stop placing wolves into shallow categories and appreciate them for what they are, beneficial members of the ecological community. “As long as people learn to live with and tolerate the new (old) neighbors, a careful but not fully conflict-free existence appears possible.”



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

Wolves may not be heroes, but they're not villains either

Wolves are iconic symbols of the wild; perhaps that is...

A team of scientists led by the <a href="https://www.nrel.gov/">National Renewable Energy Laboratory</a> (NREL) has recently assessed two promising new technologies for removing carbon dioxide from the atmosphere. Although they are still in the early stages of development, direct air <a href="https://www.earth.com/news/carbon-capture-technology-could-greatly-reduce-emissions/">carbon capture</a> and sequestration (DAC) are considered essential to achieving a net-zero emissions economy by mid-century, and limiting global warming to less than 1.5 degrees Celsius by 2100.



“We will not hit our carbon-neutral targets by midcentury or our climate targets by the end of the century if we don’t push heavily for additional removal of carbon dioxide out of the atmosphere,” said study corresponding author Patrick Lamers, a senior researcher at NREL.



The first DAC technology is solvent-based, relying upon a chemical solution that reacts with the carbon dioxide and forms potassium carbonate, which further reacts with calcium hydroxide to generate calcium carbonate. This substance is then collected, dried, and exposed to very high temperatures (about 900 degrees Celsius) to release the carbon dioxide, which is collected for further storage. The second technology is sorbent-based, employing a process that binds carbon dioxide to a silica part of an air contactor, which is heated with steam at approximately 100 degrees Celsius to release carbon dioxide that is afterwards cooled and dried.&nbsp;



In both cases, the carbon dioxide is compressed and transported through a pipeline to a geological reservoir through wells 1.8 miles deep. Pilot plants in Canada (the solvent method) and Iceland (the sorbent method) are already testing the processes. Due to the energy intensity of DAC, its environmental trade-offs are directly influenced by the energy inputs of the DAC plants. However, the large-scale deployment of these technologies will change the energy system load and create a feedback effect in which the economy-wide decarbonization will balance an offsetting technology (DAC) and sectoral mitigation efforts.



“The large-scale deployment of new technologies is likely going to create feedback effects within the system, and we need to preemptively assess these to avoid potential future, unintended consequences,” Dr. Lamers explained. “Our analysis shows the net carbon dioxide removal benefits of different direct air capture technologies and highlights environmental performance improvements for metrics such as human toxicity in a changing energy system.”



While the scientists do not specifically endorse a specific DAC technology, they stress the fact that their large-scale deployment is insufficient for mitigating climate change, if decarbonization targets will be relaxed. A simultaneous decarbonization of the electricity sector and improvements in DAC technology “are indispensable to avoid environmental problem-shifting” that may involve human toxicity or eutrophication impacts.&nbsp;



“Thus, if you look closely, our work really stresses the importance of the circular economy of energy materials and how it is a precursor to a truly sustainable future energy system heavily dependent on clean, renewable energy sources,” Dr. Lamar concluded.



The study is published in the journal <a href="https://www.nature.com/articles/s41467-022-31146-1">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&nbsp;&nbsp;

New tech can capture carbon dioxide from the atmosphere

A team of scientists led by the National Renewable Energy...

The Colorado River has been a source of contention for many years, with many states wanting a piece of this precious water source. Now, Lake Mead, the largest <a href="https://www.earth.com/news/european-farmland-is-a-huge-reservoir-of-microplastics/">reservoir</a> in the United States, is draining - and fast.&nbsp;



Considering that there has been a rise in temperatures and a decrease in rainfall, researchers at <a href="https://www.tamu.edu/">Texas A&amp;M University</a> set out to investigate the amount of water evaporating off the surface of artificial and natural lakes. This knowledge of evaporation loss may provide water managers with more insight and encourage more effective management.



Although water evaporation has been explored as something to consider when talking about climate change, there is not much information on its long-term trends and spatial distribution. The researchers created the global lake evaporation volume (GLEV) dataset to fill these gaps. This dataset utilizes modeling and remote sensing to measure evaporation in 1.42 million lakes and reservoirs worldwide.&nbsp;



The findings, published in <a href="https://www.nature.com/articles/s41467-022-31125-6">Nature Communications</a>, were not encouraging. The experts determined that from 1985 to 2018 evaporation rate increased by 3.12 cubic kilometers per year.&nbsp;



Study first author Dr. Gang Zhao, a postdoctoral fellow in the Department of Global Ecology at the Carnegie Institute for Science, further explained the results and their importance.&nbsp;



"We found that the long-term lake evaporation is 1,500 plus or minus 150 cubic kilometers per year, which is 15.4% larger than previous estimates. This suggests that lake evaporation plays a larger role in the hydrological cycle than previously thought."



According to GLEV, reservoirs account for only 5% of the storage capacity and 10% of the surface area of lakes. Despite this, they account for 16% of total evaporation volume, meaning that the water lost to evaporation in reservoirs is equivalent to 20% of worldwide water consumption.&nbsp;



Dr. Huilin Gao, who led the study, pointed out that having this data to make projections is valuable. "This dataset helps the science community better understand the role that these water bodies play in Earth systems, from global weather forecasting, flood and drought modeling to Earth system modeling under climate change."



Texas A&amp;M researchers, along with the Desert Research Institute and the U.S. Bureau of Reclamation, will be working on a NASA project to continue monitoring reservoir evaporation in the western U.S. In addition, they will expand their work with Texas reservoirs.



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

Water evaporation from lakes is far greater than expected

The Colorado River has been a source of contention for...

Plastic <a href="https://www.earth.com/news/soil-pollution-has-been-linked-to-heart-disease/">pollution</a> in the world’s oceans has increased exponentially in the past few decades and has become one of the most serious threats to marine organisms. Because plastics don’t decompose naturally, they can persist for long time periods and accumulate in marine environments. It is estimated that between 4.8 and 12.7 million tons of plastic waste enters the oceans each year, and either sinks to the bottom or remains suspended in the water column. Currents carry the plastics along and distribute them far and wide.&nbsp;



Just how widely dispersed these plastics are, was brought home by researchers from the Centre Scientifique de Monaco and the International Coral Reef Center, Republic of Palau, in a recent study published in the journal <a href="https://journals.plos.org/plosone/">PLOS ONE</a>. The researchers wondered whether microplastics were present on and around the islands of the Palau Archipelago, a series of about 340 islands in the northwestern Pacific Ocean. This archipelago is remote and far from most urban locations and pollution sources, and it boasts some of the most pristine coral reefs in the world.&nbsp;



Coral reefs are biodiverse habitats that act as nursery, breeding and feeding grounds for a variety of marine organisms. They also support human activities, such as food provision and tourism. However, coral reefs are already under threat from global climate change that has brought ocean warming and acidification. Plastic contamination would certainly be an additional stressor to these fragile ecosystems.



The researchers chose five study sites at different locations around the archipelago. Their aim was to investigate pollution by microplastics and microfibers in the beaches, reef sediments and seawater of the major islands of Palau. They used simple sampling methods to demonstrate that such research can be carried out without complicated or sophisticated technology.&nbsp;



Microplastics are particles of plastic less than 5mm in size and they pollute the marine environment either as primary microplastics (microfibers from clothing, microbeads or plastic pellets), or as secondary microplastics that have formed from the degradation of larger pieces of plastic by physical abrasion or photochemical oxidation. Microplastics can be ingested by marine organisms that may suffer injury, gut blockage, starvation and mortality as a consequence.&nbsp;



In addition, microplastics often contain toxic additives, absorb persistent pollutants and heavy metals from seawater, and are colonized by a variety of microorganisms, including pathogens. Ingesting microplastics can thus transfer chemical pollutants and pathogens to the marine organisms. Furthermore, microplastics can break down into even smaller fragments, known as nanoplastics (&lt; 1µm).



The researchers used zooplankton trawl nets with a very fine mesh size to drag through the water at a depth of 10cm at each site. The nets were washed carefully while on board and the samples transferred to bottles. Once back at the laboratory the samples were passed through filter paper and dried before being weighed.&nbsp;



Subsurface sediment samples from the coral reefs were collected by SCUBA divers who scraped up the top 5cm of sediment from sample sites at a depth of around 13 meters. Similarly, the top 5cm of sand was scraped up from sample sites at the beaches. The samples were filtered and treated with chemicals to separate the plastics from the sediment. The microplastics were then dyed with an orange dye and counted using a microscope.&nbsp;



The researchers found that microplastics and microfibers were present in all the samples they analyzed. Far from being protected by their relative isolation, the Palau islands harbored plastic pollution in their reefs, beaches and surrounding seawater. In seawater, the abundance of microplastics ranged from 0.01–0.09 particles per liter, while in beach sand there were 0.17–0.34 particles per gram. Analysis of the reef sediments revealed the presence of between 6 and 12 plastic particles per gram, which was greater than the microplastic abundance in the other two habitats.&nbsp;



The researchers were also surprised to find the presence of nanoplastic particles in all their samples. The nanoplastics were more abundant than the microplastics, representing between 54.9 and 96.1 percent of each sample analyzed. This was despite the fact that the equipment used was not designed to trap nanoplastic particles and so their abundance would have been greatly underestimated.&nbsp;



These findings indicate that pollution from microplastics and microfibers is ubiquitous in marine environments and that pristine reefs in remote areas are not protected from this phenomenon. The researchers state that microplastic pollution of ecosystems depends more upon the movement of water currents than on proximity to anthropogenic activities. They expect that microplastics are likely to affect the health of sediment-dwelling organisms as well as filter feeders such as corals.



“Plastic pollution in the reef waters and sediments of Palau, which is not a hotspot of human activity, needs to be considered in future studies, especially during heat waves which, in combination with plastic pollution, can particularly affect coral reef organisms," wrote the researchers.



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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

Pristine coral reefs have been invaded by microplastics

Plastic pollution in the world’s oceans has increased exponentially in...

Paleontologists have recently discovered that hundreds of fossil frogs died in a swamp 45 million years ago while <a href="https://www.earth.com/news/gut-molecule-makes-animals-switch-from-eating-to-mating/">mating</a>. In central Germany, this watery death trap led to the death of over 50,000 ancient birds, horses, bats, fish and frogs.&nbsp;



The Geisltal area was a coalfield with unique geological features housing thousands of fossils. Considered a scientific treasure trove, the area provides a unique window of how plants and animals have evolved over millions of years.&nbsp;



During the middle Eocene 50 million years ago, Earth was much warmer. The Geiseltal area was a swampy, subtropical forest inhabited by ancestors of the horse, crocodiles, giant snakes, lizards, birds and plenty of frogs and toads.



Previous research determined that Geiseltal frogs could have died from oxygen depletion in the water. However, the exact cause of death has long been a mystery - until now.&nbsp;



The team from <a href="https://www.ucc.ie/">University College Cork</a> (UCC) studied the bones of the fossil frogs and were able to narrow down causes of death.&nbsp;



“As far as we can tell, the fossil frogs were healthy when they died, and the bones don’t show any signs of predators or scavengers – there’s also no evidence that they were washed in during floods, or died because the swamp dried up.” said lead researcher Daniel Falk.&nbsp;



Most of the Geiseltal fossil frogs spend their lives on land, returning to the water only to breed. “By process of elimination, the only explanation that makes sense is that they died during mating.”



This phenomenon is common in frogs today. “Female frogs are at higher risk of drowning as they are often submerged by one or more males – this often happens in species that engage in mating congregations during the short explosive breeding season,” said study senior author Professor Maria McNamara.&nbsp;



“What’s really interesting is that fossil frogs from other sites also show these features, suggesting that the mating behaviours of modern frogs are really quite ancient and have been in place for at least 45 million years."



These findings are the first of new discoveries after the reopening of the famous Geiseltal fossil collections of the “Zentralmagazin Naturwissenschaftlicher Sammlungen (ZNS)” in Germany.&nbsp;



The study is published today in the journal <a href="https://onlinelibrary.wiley.com/journal/20562802">Papers in Palaeontology</a>.&nbsp;&nbsp;



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

Hundreds of frogs died while mating in ancient swamp

Paleontologists have recently discovered that hundreds of fossil frogs died...

Two new studies led by the&nbsp;<a href="https://carnegiescience.edu/">Carnegie Institution for Science</a> have detailed the origins and diversity of every known mineral on Earth by clustering kindred species of <a href="https://www.earth.com/news/sunscreen-ingredients-make-sunlight-toxic-for-corals/">minerals</a> together or splitting off new species based on when and how they originated. This 15-year-long effort can help reconstruct the history of life on Earth, guide the search for new minerals and ore deposits, predict possible features of future forms of life, and aid the search for other habitable planets and extraterrestrial life.



While the <a href="http://mineralogy-ima.org/">International Mineralogical Association</a> (IMA) has identified about 6,000 mineral species on the basis of their crystal structure and chemical composition, the new studies – which take into account mineral genesis too – have expanded this list considerably, reaching a total of 10,556 “mineral kinds.” According to the experts, water played a fundamental role in the process of mineral creation and diversification.



“For example, more than 80 percent of Earth’s minerals were mediated by water, which is, therefore, fundamentally important to mineral diversity on this planet.&nbsp;By extension, this explains one of the key reasons why the Moon and Mercury and even Mars have far fewer mineral species than Earth,” said study lead author Robert Hazen, a mineralogist and astrobiologist at the Carnegie Institution of Science.



Dr. Hazen and his colleagues have found that life has also played a direct or indirect role in the formation of nearly half of known mineral species, while more than 1,900 mineral species formed exclusively as a consequence of biological activities. Surprisingly, the studies revealed that 40 percent of the Earth’s mineral species were created in more than one way, and in several cases, more than 15 different “recipes” were used to create the same type of mineral. For instance, pyrite – commonly known as the “Fool’s Gold” – forms at both high and low temperatures, with or without water, with the help of various microbes, or in extremely harsh environments in which life plays no role whatsoever.



To complement the IMA-approved mineral list, the scientists proposed new categorizations and groupings on the basis of each mineral’s genesis as well as the time period in which they were formed. About 4.45 billion years ago, when water first appeared, the interactions between water and rocks may have produced over 350 minerals in near-surface marine and terrestrial environments. Moreover, hundreds of different minerals may have formed prior to the massive impact which vaporized most of our planet’s crust and mantle and led to the Moon’s formation about 4.5 billion years ago. Although immediately after, these minerals were obliterated, they formed again as the Earth cooled down and solidified.&nbsp;



According to the researchers, humans have created a variety of minerals too, including semiconductors, laser crystals, plastic debris, or specialty alloys, which are “likely to persist for millions of years in the geologic record, thus providing a clear sedimentary horizon that marks the so-called ‘Anthropocene Epoch.’”&nbsp;Better understanding how the vast diversity of naturally-occurring minerals have been created and what are their effects on various ecosystems could help scientists design more sustainable materials that will not have negative impacts on our planet and its inhabitants.



Finally, this new comprehensive classification of the Earth’s mineral world could have an impact on our understanding of extraterrestrial mineralogy: “What mineral-forming environments occur on the Moon, Mars, and other terrestrial worlds? Enumerating paragenetic modes, and placing each mineral species into one or more of those categories, offers an opportunity to evaluate extraterrestrial mineralogy with a new perspective,” concluded Dr. Hazen.



Both studies – “<a href="https://doi.org/10.2138/am-2022-8099">On the paragenetic modes of minerals: A mineral evolution perspective</a>” and “<a href="https://doi.org/10.2138/am-2022-8105">Lumping and splitting: Toward a classification of mineral natural kinds</a>” - have recently been published in the journal American Minerologist.&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&nbsp;&nbsp;&nbsp;

Thousands of new minerals have now been classified

Two new studies led by the&nbsp;Carnegie Institution for Science have...

As <a href="https://www.earth.com/news/climate-change-increases-the-risk-of-armed-conflict/">climate change</a> advances, many animal species are shifting the timing of major life events, such as reproduction. For instance, with earlier spring thaws, many types of flowers bloom earlier. However, it is not yet clear whether such significant changes in life history will ultimately help various species adapt and survive, or lead to larger problems instead.&nbsp;



A team of researchers led by the <a href="https://www.washington.edu/">University of Washington</a> (UW) has investigated for the first time the effect of life history changes driven by climate change on a species of large carnivore – the African wild dog (Lycaon pictus), a species distantly related to wolves which raise their young cooperatively in packs.



By analyzing field observations and demographic data from 1989 to 2020 on African wild dog populations, the scientists found that, over a three-decade period, the animals shifted their average birthing dates later by 22 days – an adaptation which allows them to match the birth of new offspring with the coolest temperatures in early winter.&nbsp;



“Although most animal species are advancing their life history events earlier in the year with climate change, this finding represents a rare instance of a species delaying its life history, and at a rate twice as high as the average rate of change observed across animal species”, said Jeremy Cohen, a macroecologist at <a href="https://www.yale.edu/">Yale University</a>, who was not involved in the study.



However, this significant shift leads to fewer pups surviving their most vulnerable, post-birth “denning period,” due to rapid temperature increases. Thus, this species – which is already threatened by habitat loss, disease, and conflicts with humans - seems to be caught in a “phenological trap,” in which changes in the timing of major life events ultimately proves maladaptive due to unprecedented environmental conditions such as climate change.



&nbsp;“Large predators play extraordinarily important roles in ecosystems, but we still have a lot to learn about the implications of climate change for these animals,” said study lead author Briana Abrahms, an assistant professor of Biology at UW. “Big climate-driven shifts like the one we found may be more widespread in top predators than originally thought, so we hope our findings will spur new climate-change research on other predator populations around the planet.”



The study is published in the journal <a href="https://dx.doi.org/10.1073/pnas.2121667119">Proceedings of the National Academy of 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&nbsp;&nbsp;

Top predators trapped by trying to adapt to climate change

As climate change advances, many animal species are shifting the...

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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

[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

[sendtonews key="iuA5mpp3jv-1641775-12187" 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.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?

[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"] Today’s Video of the Day from the...

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



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



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



Video/ Image Credit: ESA



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



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

Santiago, Chile in South America

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

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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



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



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



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



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



Video Credit: Stowers Institute for Medical Research&nbsp;



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



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

How the immune system responds to injury

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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

2022 illustrated the consequences of a warming climate

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Earth,Like,Exoplanet,3d,Render

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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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...