A couple of months from now, the world will witness the launch of a satellite that promises to change the way we understand our planet. This isn't just any satellite - it's NISAR, a marvel of scientific innovation that will map our planet in breathtaking detail, all thanks to a special technique.



Designed to provide unparalleled insights into Earth's dynamic processes, NISAR will monitor changes - from the shifting of tectonic plates to the melting of polar ice caps - with remarkable precision.



Its exceptional capabilities will empower scientists and policymakers to better address pressing global challenges such as climate change, natural disasters, and resource management.



As anticipation builds, the mission stands as a remarkable example of international collaboration, with NASA and ISRO (the Indian Space Research Organization) joining forces to bring this revolutionary technology to life.



<h2 class="wp-block-heading" id="h-the-promise-of-nisar-s-technology">The promise of NISAR's technology</h2>



Taking its name and function from Synthetic Aperture Radar (SAR), this <a href="https://www.earth.com/news/sentinel-2c-satellite-delivers-first-breathtaking-images-of-earth/" target="_blank" rel="noreferrer noopener">satellite</a> will produce a detailed view of Earth's surface. 



The objective? To track the slightest movements on our planet, right down to the scale of an inch (2.5 centimeters).



From the growth of a forest to the motion of glaciers and the flex of Earth's crust - nothing will escape the watchful eye of NISAR.



Unlike conventional radar, SAR steps up its genius by capturing multiple measurements as it hovers above, thereby refining the scene below.



Think of it as looking at <a href="https://www.earth.com/news/study-earth-had-planetary-rings-like-saturn-466-million-years-ago/" target="_blank" rel="noreferrer noopener">Earth</a> with a super-powered magnifying glass. The beauty of SAR is that it doesn't need massive antennae to function.



NISAR's radar antenna reflector, for instance, is 39 feet wide (around 12 meters) - as long as a city bus. Yet, without SAR, it would have to be a staggering 12 miles in diameter to achieve this level of precision.



<h2 class="wp-block-heading" id="h-the-journey-of-sar">The journey of SAR</h2>



SAR isn't a new technology. In the early 1970s, a team of engineers at NASA's Jet Propulsion Laboratory - including Caltech graduate Charles Elachi - developed SAR to study the surface of <a href="https://www.earth.com/news/nasa-sends-missy-elliotts-hip-hop-music-to-venus/" target="_blank" rel="noreferrer noopener">Venus</a>.



The experts realized the technology's potential to reveal intricate details of <a href="https://www.earth.com/news/earth-day-2023-20-reasons-to-cherish-our-planet/" target="_blank" rel="noreferrer noopener">our planet</a> and made it their mission to harness its power.



"The NISAR mission will open a whole new realm to learn about our planet as a dynamic system," said Elachi. 



The advantage of radar lies in its ability to collect data both day and night, undeterred by clouds, which makes it a perfect tool for studying a distant planet.



The JPL venture led to many successful NASA space shuttle radar missions, with each one refining the use of SAR.



<h2 class="wp-block-heading" id="h-sar-a-high-resolution-solution">SAR: A high-resolution solution</h2>



"It’s a technique to create high-resolution images from a low-resolution system," noted Paul Rosen, NISAR’s project scientist.



SAR works by constantly transmitting microwaves and receiving echoes from Earth's surface. As the satellite moves, these return signals exhibit slight changes in frequency.



This is where the magic happens. Akin to a camera lens focusing light to produce a photograph, SAR’s processing adjusts for these "shifts" to generate a sharp, focused image.



<h2 class="wp-block-heading" id="h-nisar-will-transform-earth-observation">NISAR will transform Earth observation</h2>



Wondering how SAR will revolutionize our understanding of Earth? Imagine a composite of two images that reveals the slightest differences by measuring changes in echo delays - an interferogram.



Picture it as modern art, with each multicolor band signifying the motion of land surfaces. Or envision polarimetry, another SAR technique, which measures the orientation of return waves relative to <a href="https://www.earth.com/news/new-details-on-wow-signal-transmitted-from-deep-space/" target="_blank" rel="noreferrer noopener">transmitted signals</a>.



It's an insightful tool for identifying an area’s land cover and tracking changes such as deforestation and flooding. This will create exceptional opportunities for researchers across the globe.



"This mission packs in a wide range of science toward a common goal of studying our changing planet and the impacts of natural hazards," said Deepak Putrevu, co-lead of the Space Applications Centre in India.



Developed in partnership with NASA and the <a href="https://www.isro.gov.in/" target="_blank" rel="noreferrer noopener">Indian Space Research Organisation</a>, NISAR is set to take off from India in March 2025.



The mission will provide us with an unprecedented understanding of changes taking place on Earth's solid surfaces, including the Antarctic ice sheet.



The anticipation is building as we get ready to see our planet through SAR vision - revealing, insightful, and awe-inspiring.



Information for this article came from a JPL <a href="https://www.jpl.nasa.gov/news/how-new-nasa-india-earth-satellite-nisar-will-see-earth/">press release</a>.



Image Credit: Credit: ESA/NASA/JPL-Caltech<a href="https://d2pn8kiwq2w21t.cloudfront.net/original_images/2-Aleutians-16.jpg"></a>



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NISAR: The satellite that will change how we see Earth

A couple of months from now, the world will witness the launch of a satellite that promises to change the way we understand our planet. This isn't just any satellite - it's NISAR, a marvel of scientific innovation that will map our planet in breathtaking detail, all thanks to a special technique. Designed to provide unparalleled insights into Earth's dynamic processes, NISAR will monitor changes - from the shifting of tectonic plates to the melting of polar ice caps - with remarkable precision. Its exceptional capabilities will...

According to new research from the <a href="https://umich.edu/">University of Michigan</a>, eating a hot dog might take 36 minutes of healthy life away from you. The researchers found that by exchanging only 10 percent of daily calories from beef or processed meat for those from sustainable foods like fruits, <a href="https://www.earth.com/news/nuts-lowers-risk-obesity/">nuts</a> and veggies, a significant impact could be made. 

With this 10 percent switch, a dietary carbon footprint can be reduced by one third, and a person may gain 48 minutes of healthy life per day. 

The researchers examined 5,800 foods, which were evaluated on both their health impact and their environmental impact. Katerina Stylianou, who conducted the study as part of her doctoral candidacy, explained what sets her research apart from others.

"Generally, dietary recommendations lack specific and actionable direction to motivate people to change their behavior, and rarely do dietary recommendations address environmental impacts."

The healthy minutes calculation for each food was made by adapting previous research that looked at 15 dietary risk factors and estimates of disease burden and nutrition profiles of commonly consumed foods in the U.S.. 

To evaluate the environmental impact of foods, the experts looked at the life cycle of food from production to disposal, taking into account factors such as water usage and human health impacts from production-related air pollution. The researchers developed scores for 18 environmental indicators.

The study ultimately classified foods into three categories - green, yellow and red. The green foods are sustainable foods that have a positive impact on both health and the environment. Green foods include fruits, nuts and other plants, as well as a few select seafoods. 

On the other end of the spectrum, red foods have a high negative impact on health or the environment. The red foods include mainly beef, pork, lamb and processed meats.

The research suggests that legumes, nuts and outside grown vegetables should be increased in one’s diet, while beef, shrimp, pork, lamb and greenhouse grown vegetables should be limited. Small changes can have a positive impact. At the same time, however, the scientists emphasize that the best foods for the environment are not always the best for ones health and visa versa.    

The study is published in the journal <a href="https://www.nature.com/natfood/">Nature Food</a>.

---

By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Eat sustainable foods, gain more healthy minutes of life

According to new research from the University of Michigan, eating...

<a href="https://ok.ubc.ca/">UBC Okanagan</a>, a university in Canada, is home to a Building Academic Retention through K-9s (BARK) program. While this program has long shown an increase in student well-being from interactions with dogs, the specifics have remained unknown. 

To investigate, Dr. John-Tyler Binfet recently led a team in the assessment of 284 interactions between students and dogs. 

"There have been a number of studies that have found canine-assisted interventions significantly improve participants’ wellbeing, but there has been little research into what interactions provide the greatest benefits," explained Dr. Binfet. "We know that spending time with therapy dogs is beneficial but we didn’t know why.”

To take a closer look at what type of interactions with dogs are most beneficial to students, the researchers recruited volunteers. 

The participants were assigned one of three different interactions: with a dog without touching, with a dog with touching, or with a dog handler without a dog. Before and after each interaction, the students answered questions to assess their well-being.

The study revealed that students showed improvement from interactions with dogs regardless of their initial level of well-being. Unsurprisingly, the students who interacted with the dogs by touching them had a greater increase in their perceived well-being than those who did not touch dogs. 

Dr. Binfet explains why his research is very timely. “As students potentially return to in-person class on their college campuses this fall and seek ways to keep their stress in check, I’d encourage them to take advantage of the therapy dog visitation program offered." 

"And once there - be sure to make time for a canine cuddle...That’s a surefire way to reduce stress.”

Dr. Binfet points out that his research shows how best to use therapy dogs, and that a proper ratio of dogs to people is essential to allow dog cuddling.

---

By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Cuddling with dogs can improve your well-being

UBC Okanagan, a university in Canada, is home to a...

Humans are the only <a href="https://www.earth.com/news/newborn-mammals-can-see-the-world-before-they-open-their-eyes/">mammals</a> to be habitually bipedal, and the evolution of bipedalism over the past seven million years has led to many changes in our skeletal structure and gait. A new study has revealed that rotating hips are not an advantage in human locomotion.

Until recently, it was believed that the relatively long legs of humans gave them an advantage in terms of a longer stride that made walking locomotion more efficient. 

However, in the results of a study published by <a href="https://www.biologists.com/">The Company of Biologists</a>, Nathan Thompson of <a href="https://www.nyit.edu/">NYIT</a> finds that chimpanzees have a 25 percent longer stride length than humans, when height is taken into consideration.

"Standardized by size, humans really don’t have long strides," says Thompson, after investigating the strides of humans and chimpanzees as they walked at different speeds.

Thompson and colleagues Brigitte Demes, Susan Larson (both at Stony Brook University, USA) and Matthew O’Neill (Midwestern University, USA) habituated chimpanzees to walking upright on their back legs while they filmed the animals in 3-D. 

When they scaled the humans and chimpanzees to have matching heights, they found that although the humans’ legs were 112 percent longer than the legs of chimpanzees, their strides were 26,7 percent shorter.

Upon closer investigation, Thompson observed that chimpanzees lift their hips considerably on the side that takes the stride. This is known as a pelvic step or pelvic rotation. 

While chimpanzees rotate their hips between 28 and 61 degrees, humans show a paltry 8-degree rotation while striding. A human keeps his or her pelvis relatively stable while walking, although as walking speed increases, the pelvic step contributes more to the total step length.

When the researchers analyzed how much rotating hips increased the stride length of a chimpanzee, they found that it extended the length by 5.4 times more, taking into account a chimp’s height. 

"I think that chimpanzees use pelvic rotations to try to squeeze every bit of stride length out, otherwise their strides would be - absolutely - very small,’ says Thompson, explaining that apes and monkeys tend to walk on bent legs that naturally shorten their stride; 

"I don’t think there are a lot of options other than rotating the pelvis, given their anatomical constraints."

Humans have always been considered to be very efficient walkers and to have the longest possible stride. However, now that their stride size has been shown to be relatively shorter than that of their nearest living relatives, the researchers consider that other factors must have been important in the evolution of the human gait. 

Thompson suggests that walking with an exaggerated pelvic rotation may increase stride length but could also disrupt the natural swing of our arms and legs, which helps to balance us. Ditching the rotating hips may have also helped to stabilize a human’s center of mass, which would mean that fewer muscles are active while walking and so the energetic costs are reduced. 

"Humans have had about seven million years of selective pressure for economical bipedalism; this means that there has been a lot of time to experiment with the costs and benefits, so it might be worth it to walk with slightly shorter strides, because whatever energy we lose, we might make up elsewhere," concludes Thompson.

The study is published in the <a href="https://journals.biologists.com/jeb">Journal of Experimental Biology</a>.

---

By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Humans gave up rotating hips for a smoother stride

Humans are the only mammals to be habitually bipedal, and...

Research on speech development stresses the challenges children face in gaining control over their vocal articulators, including the tongue, lips, and jaw, in order to be able to produce coherent speech sounds. An increasing number of scientists argue that this control is gradually gained during babbling, when infants start producing their first utterances which resemble typical speech sounds. 

Babbling appears to be a universal form of human behavior, characterizing child development in all languages and cultures. 

Language use is considered one of the trademarks of humanity. Yet, its origins and development are far from being completely understood. Much knowledge about language evolution is gathered in the field of biolinguistics through comparing vocal ontogenetic processes in humans with similar processes in non-human animals. 

Babbling behavior seems to be quite rare in the animal kingdom. Until recently, this phenomenon had only been analyzed in songbirds. Due to significant differences in both brain organization and anatomy (birds have a syrinx instead of a larynx like humans), it has been very difficult to apply research findings about songbird babbling to humans. 

Recently though, a study conducted by a team of scientists from the <a href="https://www.museumfuernaturkunde.berlin/en">Museum für Naturkunde Berlin</a> discussed babbling behavior in a mammal species that, at first sight, seem to be highly different from humans: the greater sac-winged bat Saccopteryx bilineata. 

Researchers investigated this behavior of 20 bat pups in their natural habitats in Costa Rica and Panama, and discovered that these bats spend around seven weeks engaging in daily babbling behavior during their ontogeny, and employ long multisyllabic vocal sequences that include parts similar to the vocal repertoire of adult bats. 

“Pup babbling is a very conspicuous vocal behavior, it is audible at considerable distance from the roost and babbling bouts have a duration of up to 43 minutes,” researcher Martina Nagy said. While babbling, pups learn the songs of the adult males. 

Even more surprisingly, bat babbling is characterized by the same features as that of human infants, including reduplication of syllables and the use of rhythmic patterns. And whereas in the case of songbirds only young males babble, bat babbling behavior occurs in both male and female pups.

More studies of this fascinating bat species could give us new keys for unlocking the mysterious evolutionary origins of human language. 

The study is published in the journal <a href="https://www.sciencemag.org/">Science</a>.

---

By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Baby bats and human infants engage in similar babbling behavior

Research on speech development stresses the challenges children face in...

As the entire world desperately struggles to contain the <a href="https://www.earth.com/news/second-dose-of-the-covid-19-vaccine-is-far-more-powerful/">COVID-19</a> pandemic, a newly established <a href="https://www.hsph.harvard.edu/c-change/news/preventing-pandemics-task-force/">International Scientific Task Force</a> has released a <a href="https://www.hsph.harvard.edu/c-change/news/PreventingPandemicsResearch/">report</a> that provides recommendations for avoiding future pandemics. 

The international team of experts from the United States, Latin America, South Asia, and Africa says that more sustained investments in nature, such as protecting forests and changing agricultural practices. are essential for preventing future spillovers of pathogens from animals to humans. These conservation actions should be combined with a global effort of strengthening healthcare systems.

Some of the main causes of the emergence of zoonotic diseases with pandemic potential include livestock operations, wildlife hunting and trade, the destruction of tropical forests, the expansion of agricultural lands, rapid urbanization, and climate change. An integrated approach investigating ways to control these risk factors is urgently needed, argued scientists such as Dr. Aaron Bernstein, the leader of the new task force and interim director of the Center for Climate, Health, and the Global Environment at <a href="https://www.hsph.harvard.edu/">Harvard T.C. Chan School of Public Health</a>. 

“COVID-19 was a warning shot from the whole of nature to our species,” said Dr. Bernstein. “We need more precise and affective interventions to prevent spillover, and to get there, we need greater investment in science and actions that prevent disease emergence. What we’ve learned is that our salvation comes cheap. The costs of these actions are a fraction of the cost of managing a pandemic once it emerges.”

Previous <a href="https://science.sciencemag.org/content/369/6502/379">research</a> conducted by Dr. Bernstein and colleagues estimated the annual costs of preventing future pandemics by reducing deforestation and regulating wildlife hunting and trade to be as little as $22 billion a year, which is less than two percent of the costs of responding to the COVID-19 pandemic. 

Beyond increasing control of these potential causes, the task force also asked for more in-depth research about where pandemics are more likely to emerge due to factors such as governance, travel patterns, or population density, and for more sustained investigations of the diversity of wildlife pathogens that could cause zoonotic diseases.

The findings from the task force’s inaugural report will soon be translated into international policy recommendations at the G20 summit from October 2021 and the 26th United Nations Climate Change Conference (COP26) from November 2021.  

---

By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Investing in nature is needed to avoid the next pandemic

As the entire world desperately struggles to contain the COVID-19...

Rattlesnakes are native to the Americas and are famous for the rattling noise they make by vibrating the tail tip segments when danger approaches. Previous research has shown that the frequency of this acoustic signal changes abruptly as a threat gets closer, but the significance of this change was not explained.

In a new study published in the journal <a href="https://www.cell.com/current-biology/home">Current Biology</a>, researchers propose that the sudden change to a higher frequency has the effect of making approaching predators (and humans) think that they are closer to the snake than they really are.

Study senior author Boris Chagnaud of Karl-Franzens-University Graz visited an animal facility where rattlesnakes were housed. He noticed that the characteristic rattling increased in frequency as he walked towards a snake but decreased again when he walked away. Chagnaud and his colleagues designed some ingenious experiments to test the function of this frequency change.

Initially, the researchers used objects that appeared to move closer to a snake by increasing in size. One of the objects looked like a human torso, while another was a large, black disk. As these potential threats appeared to come closer to the snake, the rattling rate increased gradually to approximately 40 Hz and then suddenly jumped to an even higher frequency of between 60 and 100 Hz.

Subsequent experiments showed that rattlesnakes modulate their rattling rate in response to the speed at which an object is approaching, rather than its apparent size. “In real life, rattlesnakes make use of additional vibrational and infrared signals to detect approaching mammals, so we would expect the rattling responses to be even more robust,” says Chagnaud.

To test the effect of this abrupt change in rattling frequency on human listeners, the researchers enlisted the help of 11 participants who moved through a virtual grassland environment where a virtual snake lay concealed. They were asked to estimate their distance from the hidden snake as its rattling gradually increased in frequency. 

When the individuals were at a virtual distance of four meters from the sound, its frequency abruptly jumped to 70 Hz. This sudden change in frequency caused the participants to perceive that they were much closer to the virtual snake than they actually were. 

“Our data show that the acoustic display of rattlesnakes, which has been interpreted for decades as a simple acoustic warning signal about the presence of the snake, is in fact a far more intricate interspecies communication signal,” explains Chagnaud.

“The sudden switch to the high-frequency mode acts as a smart signal fooling the listener about its actual distance to the sound source. The misinterpretation of distance by the listener thereby creates a distance safety margin.”

“Snakes do not just rattle to advertise their presence, but they evolved an innovative solution: a sonic distance warning device similar to the one included in cars while driving backwards."

“Evolution is a random process, and what we might interpret from today’s perspective as elegant design is in fact the outcome of thousands of trials of snakes encountering large mammals. The snake rattling co-evolved with mammalian auditory perception by trial and error, leaving those snakes that were best able to avoid being stepped on.”

---

By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Rattlesnakes rattle to warn and deceive us

Rattlesnakes are native to the Americas and are famous for...

A new study claims that leaking pipes from Baltimore’s aging infrastructure is <a href="https://www.earth.com/news/drug-pollution-becomes-addictive-for-fish/">polluting</a> the Chesapeake Bay with thousands of human doses of pharmaceuticals per year. Study lead author Megan Fork is a postdoctoral research associate at <a href="https://www.caryinstitute.org/">Cary Institute of Ecosystem Studies</a>.

“Pharmaceuticals enter freshwaters through multiple pathways, including effluent from wastewater treatment and septic systems, as well as agricultural runoff," said Fork. "An important, but often overlooked contributor is aging and faulty wastewater infrastructure, which is common in many older cities.”

To understand the amount of pharmaceuticals entering the environment from leaking pipes alone, the scientists chose to research the Gwynns Falls watershed, a location where no wastewater is discharged. The researchers monitored six sites in the watershed, taking samples every week for a year and screening for 92 pharmaceutical compounds. 

Across all of the sites, 37 compounds were found. Pain relievers and antibiotics were commonly detected in the water samples. “Establishing the loads of contaminants such as pharmaceuticals is important since low concentrations may mislead regulators and managers into thinking that they are insignificant," explained Fork.

"In Baltimore we are already seeing that stream-dwelling bacteria are resistant to common antibiotics, suggesting that low chronic exposures can result in significant effects on stream life.”

Study senior co-author Emma Rosi noted that this study can be scaled up to look at an entire region.

“We estimate that nearly 1 percent of raw sewage originating in the Gwynns Falls watershed flows into the environment via leaking infrastructure. If we extrapolate our calculations to the entire Chesapeake Bay watershed, we estimate that approximately 11.7 billion liters of raw sewage may enter the Bay via leaks every year - carrying a range of pharmaceutical compounds that can affect aquatic organisms and disrupt ecosystem processes," said Rosi.

The scientists point out that the research is important because it highlights the threat of uncommon "pollution pathways" rather than just the usual suspects. We must look at everything if we are aiming to maintain healthy environments. 

The study is published in the journal <a href="https://pubs.acs.org/journal/esthag">Environmental Science &amp; Technology</a>

---

By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Leaking pipes in Baltimore polluting the Chesapeake Bay

A new study claims that leaking pipes from Baltimore’s aging...

If ozone depleting substances - such as the notorious chlorofluorocarbons (CFCs) - had been left unchecked several decades ago, their continued and increased use would have had a catastrophic effect on the <a href="https://www.earth.com/news/exceeding-tipping-points-could-triple-the-costs-of-climate-change/">climate</a>, according to a new study led by Dr. Paul Young from <a href="https://www.lancaster.ac.uk/">Lancaster University</a>.

The <a href="https://www.unep.org/ozonaction/who-we-are/about-montreal-protocol">Montreal Protocol</a>, a landmark multilateral environmental agreement regulating the production and consumption of nearly 100 man-made ozone depleting substances, was adopted in 1987 in order to stop the destruction of the ozone layer. This is Earth’s protective shield against harmful ultraviolet radiation from the sun (UV). 

Using a new modeling framework that integrated data on ozone depletion, the carbon cycle, vegetation damage by increased UV, and climate change, the researchers estimated that if CFCs had not been banned by the Montreal Protocol, we would have witnessed a worldwide collapse of the ozone layer by the 2040s. 

“Our new modeling tools, have allowed us to investigate the scorched Earth that would have resulted without the Montreal Protocol’s ban on ozone depleting substances," said Dr. Young.

In such a bleak scenario, which the team calls the "World Avoided," the strength of the sun’s UV in mid-latitudes (including large parts of Europe, the United States and Central Asia) would significantly surpass that from present day’s tropics by 2050, and by 2100 the ozone above the tropics would be diminished by 60 percent. 

“A world where these chemicals increased and continued to strip away at our protective ozone layer would have been catastrophic for human health, but also for vegetation. The increased UV would have massively stunted the ability of plants to soak up carbon from the atmosphere, meaning higher CO2 levels and more global warming,” stated Dr. Young. 

Without the Montreal Protocol’s ban on CFCs, there would have been 580 billion tons less carbon stored in vegetation and soils, and an additional 40 to 50 percent of CO2  in the atmosphere. This would have contributed to a 2.5°C rise in global air temperatures by the end of the 21st century. 

“With our research, we can see that the Montreal Protocol successes extend beyond protecting humanity from increased UV to protecting the ability of plants and trees to absorb CO2,” concluded Dr. Young. 

This should be a reminder for all of us that, although it is too late to avoid global warming, collective action can help avoiding some of climate change’s most catastrophic effects.

The study is published in the journal <a href="https://www.nature.com/">Nature</a>.

---

By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Ban on ozone depleting substances prevented catastrophic consequences

If ozone depleting substances - such as the notorious chlorofluorocarbons...

When it comes to popular <a href="https://www.earth.com/news/outdoor-cats-tourism/">outdoor</a> activities in the United States, recreational fishing is nearly at the top of the list - second only to jogging. More than 44 million Americans describe themselves as recreational anglers.

Last spring, researchers at <a href="https://www.lsu.edu/">LSU</a>, the U.S. Geological Survey, and Clemson University set out to investigate how the pandemic was affecting recreational fishing. 

The team distributed an online survey in July and August of 2020, and received thousands of responses across 10 states. Recreational anglers were asked 20 questions, including whether they fished more or less often during the pandemic and what their motivations were.

Study lead author Stephen Midway is an assistant professor in the Department of Oceanography &amp; Coastal Sciences at LSU. “What we found is people still fished and in fact, they fished a little bit more during the pandemic,” said Professor Midway.

Overall, 80 percent of the survey respondents said they fished as much during the pandemic as they did before, while 20 percent said they fished more.

The individuals who fished more during the pandemic took about one additional trip in the spring. The researchers explained that while this increase may seem small, it had a positive ripple effect on the economy.

“When you go fishing, you are spending money. You may have bought your fishing rod and reel 10 years ago, but when you go fishing, you buy bait, put gas in your car or boat, buy ice, buy a fishing license and possibly pay for a boat slip," said Professor Midway.

"There’s a significant amount of money that gets distributed throughout the economy through the travel cost of fishing including that one extra fishing trip."

In addition, money from state fishing licenses is often used to support wildlife management agencies and fisheries.

“For most states, a large amount of their fisheries management budget is generated by fishing license sales. That helps increase the revenues to help them do their jobs,” said Professor Midway.

Most of the survey respondents expressed the belief that fishing was a very low risk activity during the pandemic. 

Many of the individuals had experienced reduced work hours and less income as a result of COVID-19 shutdowns. They said that they turned to recreational fishing as a relatively low-cost outdoor activity.

As for what motivated people to go fishing during the pandemic, the most popular responses were: social and family bonding, stress relief, and being in nature.

“This study was very valuable to state fisheries agencies, because it helped to identify what the broad motivations were for people to increase their fishing activity," said Jeff Kopaska, who is a fisheries research biometrician with the Iowa Department of Natural Resources.

"State agencies were well aware that many more fishing licenses were being sold during the pandemic, and everyone had some opinion ‘why.’ This work identified that fishing was perceived as a safe, stress-relieving activity, which will now help agencies to fine-tune messaging to try to keep people fishing in the future."

“The willingness of anglers to keep fishing during a public health crisis suggests the importance of the activity," said Professor Midway. "A better understanding of anglers’ motivation and behaviors is important for any type of resource management."

The study is published in the journal <a href="https://plos.org/">PLOS ONE</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Recreational fishing got a boost during the pandemic

When it comes to popular outdoor activities in the United...

A new study by ecologists at the <a href="https://www.umass.edu/">University of Massachusetts Amherst</a> has revealed that 1,330 garden centers and online retailers are still selling invasive species as garden plants. Out of the hundreds of invasive plants that the team found available for sale, 20 species are illegal to grow or sell nationwide.

“Once we’ve recognized that an ornamental plant can be invasive, we would hope that commercial sales of that species would stop,” said study lead author Evelyn M. Beaury.

“But our findings show that our current framework for removing invasive plants from plant trade isn’t working. States are generally doing a good job limiting sales of their own regulated plants, but we found major inconsistencies in what’s being regulated across state borders. Nearly all states had at least one of their regulated plants sold in a neighboring state.”

The researchers found that 61 percent of 1,285 plant species identified as invasive in the U.S. remain available through the plant trade. This includes 50 percent of state-regulated species and 20 percent of federal noxious weeds.  

According to the study authors, the most concerning case of federally designated noxious weed sales is the availability of cogongrass (Imperata cylindrica), which they found to be offered by 33 vendors in 17 states. This aggressive species, which is native to Southeast Asia, has spread rapidly across the South in the last few decades and is classified as one of the world’s most invasive plants.

“This is a tricky case, because plant breeders are marketing a sterile cultivar. But research shows these plants are not completely sterile and can still become invasive," explained Beaury.

Some of the vendors are large online marketplaces like eBay and Amazon,  where invasive plants can be shipped across state borders.

“While patchy state regulations definitely contribute to the widespread availability of invasive plants in the U.S., it’s clear we as a public also lack awareness about which plants are invasive and how they spread to new areas," said Beaury.

"We’ve already heard from state regulators that have used our results to follow up with growers selling invasive species. This is great news, and if we want to continue to protect native ecosystems, regulators and managers need more resources to do so.”

The researchers suggest that regional regulation, as well as outreach to growers and consumers, is needed to reduce the ongoing propagation of garden plants that are known to be invasive in the United States. 

"We’ve known for decades that many gardening and landscaping plants are invasive, but we’ve done little to stop propagating them. We can do better," said study senior author Professor Bethany Bradley. 

The study is published in the journal <a href="https://www.esa.org/frontiers-in-ecology-and-the-environment/">Frontiers in Ecology and the Environment</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Hundreds of invasive species are for sale as garden plants in the U.S.

A new study by ecologists at the University of Massachusetts...

As most know, bees are important <a href="https://www.earth.com/news/green-spaces-provide-a-refuge-for-urban-pollinators/">pollinators</a> for both crops and wild plants. It’s unknown exactly how climate change may impact bees. Now, researchers from <a href="https://www.imperial.ac.uk/">Imperial College London</a> have examined the relationship between bee flight and temperature. 

The researchers measured bumblebee motivation to fly and flight endurance under different temperatures. The research was carried out by attaching the insects to ‘flight mills’ where they could fly in controlled circles with speed and distance being recorded. 

Starting with a low temperature limit of 12°C, the scientists found that bee flight performance initially increased, peaking between 25-27°C, but then started to decline with even warmer temperatures. 

This suggests that climate change could actually be good news for bumblebees living in cooler areas. According to study first author Daniel Kenna, the impacts of warming climate on bees is complicated.

“Climate change is often thought of as being negative for bumblebee species, but depending on where in the world they are, our work suggests it is possible bumblebees will see benefits to aspects of an important behavior," explained Kenna.

"However, more extreme weather events, such as cold snaps and the unprecedented heatwaves experienced in recent years, could consistently push temperatures beyond the comfortable flight range for certain species of bumblebees."

"These risks are particularly pertinent for ‘fixed colony’ pollinators like bumblebees, which cannot shift their position within a season if conditions become unfavorable, and potentially provide a further explanation as to why losses have been observed at species’ southern range limits.”

The study found that at optimal temperatures, bees may fly as far as 3 km to forage, while under hot temperatures they only flew about 1 km, and even less and colder temperatures. 

The research indicates that an increase in temperature could mean an increase in pollination in cooler areas, but could cause severe harm to bees in areas that are already warm. The full picture of what the future holds for bees remains to be seen.   

The study is published in the journal <a href="https://besjournals.onlinelibrary.wiley.com/journal/13652435">Functional Ecology</a>. 

---

By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Bee flight performance drops under extreme heat

As most know, bees are important pollinators for both crops...

The Colorado River is a major source of water in the arid western United States. To support higher populations of people and development on such a finite resource, the Colorado River has been dammed and <a href="https://www.earth.com/news/water-reservoirs-generate-much-higher-emissions-than-expected/">reservoirs</a> have been created. One of the more famous reservoirs, Lake Mead, created by the Hoover Dam, is drying out. The reservoir is now only 35 percent full, the lowest it's been since it was first filled in the 30’s.

This low point for the reservoir is part of a long-standing drought that is now in its 22nd year. Similar dry conditions may be the norm with climate change in the foreseeable future. Growing human populations and wasteful water practices have only thrown gasoline on the fire. 

While water shortages in the American West are a surprise to no one, the drop in Lake Mead has caught the region unprepared and triggered water allotment cuts, causing ten state governors to ask President Biden to declare an emergency. Such a declaration would allow some farmers and ranchers access to federal assistance. 

Arizona will have its access to the Colorado River water reduced by 18 percent and Nevada will be reduced by 7 percent. Water released into Mexico under a treaty signed in 1944 will be reduced by 5 percent. 

Recently, small surges of Colorado River water have been able to reach the Gulf of California and wild habitats that have been under severe stress due to damming and water usage upstream. With water levels slated to drop even further in the coming years, it seems likely that these estuaries will suffer even more. 

Humans will also be forced to deal with the realities of this catastrophe of their own making. The first tier water cuts, set to impact Arizona, Nevada and Mexico, will possibly become more restrictive in the next phase, with more restrictions expected as soon as 2023.

It seems that in the West we may be coming to terms with a long legacy of water misuse and the new threat of a changing climate.         

---

By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Running dry: water shortages in the Colorado River

The Colorado River is a major source of water in...

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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;



---



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



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

Flu viruses are more flexible than expected

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



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



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



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



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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

Detecting mercury contamination with the tap of a finger

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

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



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



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



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



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



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



Video/ Image Credit: European Space Agency&nbsp;



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



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

Kainji Lake in north central Nigeria

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



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



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



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



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



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



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



Video Credit: Amanda Nguyen/University of Illinois



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



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

Designing crops that can beat the heat

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

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



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



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



Video Credit: ACS Reactions



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



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

How does salt makes things taste better?

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



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



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



Video/ Image Credit: ESA



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



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

Santiago, Chile in South America

[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

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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

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Dublin, the capital and largest city of Ireland. Beyond its pub culture, Dublin is known as a modern culinary destination and a UNESCO City of Literature.



"Dublin is located near the midpoint of Ireland’s east coast in the province of Leinster. The city, which covers an area of around 115 square kilometers, is bordered by the Dublin Mountains, a low mountain range to the south, and is surrounded by flat farmland to the north and west," says ESA.



"The city straddles the River Liffey, which rises in the Wicklow Mountains and flows around 80 kilometers eastwards through the city of Dublin, in which it is canalised and bordered with quays. It then empties into Dublin Bay, an arm of the Irish Sea."



Dublin has an abundance of green spaces, including one of the largest enclosed public parks in any European capital city. Phoenix Park, which was originally formed as a royal hunting park in the 1660s, includes 707 hectares of green space.



Video Credit: ESA&nbsp;



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



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

The city of Dublin on Ireland's east coast

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



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



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



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



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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



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



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



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



Video Credit: NASA Goddard



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



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

Wetlands are a major source of methane emissions

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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



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

The rapid retreat of the Columbia Glacier

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

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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

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



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



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



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



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



Video Credit: Stowers Institute for Medical Research&nbsp;



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



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

How the immune system responds to injury

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

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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

2022 illustrated the consequences of a warming climate

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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

[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...