For decades, astronomers have puzzled over the intense heat and persistence of the fiery hot gas surrounding the Milky Way.&nbsp;



New research by scientists from the <a href="https://www.rri.res.in/" target="_blank" rel="noreferrer noopener">Raman Research Institute</a> (RRI), <a href="https://iitpkd.ac.in/" target="_blank" rel="noreferrer noopener">IIT-Palakkad</a>, and <a href="https://www.osu.edu/" target="_blank" rel="noreferrer noopener">Ohio State University</a> sheds light on this mystery. The team has proposed a model to identify the sources responsible for heating and maintaining this extraordinary phenomenon.



<h2 class="wp-block-heading" id="h-the-milky-way-s-hidden-gas-reservoir">The Milky Way’s hidden gas reservoir</h2>



The <a href="https://www.earth.com/news/milky-way-like-galaxies-were-present-in-the-early-universe/" target="_blank" rel="noreferrer noopener">Milky Way</a> contains more <a href="https://www.earth.com/news/mechanism-discovered-that-creates-the-gas-disks-around-black-holes/" target="_blank" rel="noreferrer noopener">gas</a> than stars, and this gas plays a crucial role in sustaining star formation. This massive gas reserve has enabled the galaxy to continue forming stars over billions of years.&nbsp;



However, the gas is so tenuous that it has long eluded observation, making it difficult for astronomers to measure its true volume.



In the past few decades, scientists confirmed the existence of a vast sphere of hot gas enveloping the Milky Way. This gas extends up to 700,000 light-years and reaches temperatures of several million degrees Kelvin.&nbsp;



Researchers initially attributed its high temperature to the galaxy’s gravitational forces. The gas swirls constantly, preventing it from falling inward under the pull of gravity.



<h2 class="wp-block-heading" id="h-the-discovery-of-even-hotter-gas">The discovery of even hotter gas</h2>



Recent observations revealed something even more astonishing: a hotter layer of gas surrounding the Milky Way.&nbsp;



This gas, estimated to be around 10 million degrees Kelvin, was identified through faint X-ray emissions detected in all directions. The same gas also appeared as an absorbing medium in the spectra of three distant <a href="https://www.earth.com/news/early-quasars-defied-the-laws-of-physics-with-rapid-growth/" target="_blank" rel="noreferrer noopener">quasars</a>.



This discovery posed new questions: What was causing this gas to reach such extreme temperatures, and how was it being sustained? These findings sparked a surge of research aimed at identifying the mysterious heat sources.



<h2 class="wp-block-heading" id="h-supernovae-the-engines-heating-the-milky-way">Supernovae: The engines heating the Milky Way</h2>



The new model proposed by RRI and its collaborators provides a detailed explanation for the heating mechanism.&nbsp;



The research shows that the X-ray-emitting gas and the absorbing gas are not the same. Instead, the X-ray-emitting gas originates from a puffed-up region surrounding the Milky Way’s stellar disk.



This region is created by the ongoing star formation within the Milky Way. Massive stars in these star-forming regions eventually explode as <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernovae</a>, releasing vast amounts of energy. These explosions heat the surrounding gas to extreme temperatures.



“Explosions keep heating up the gas floating around the disk of the Milky Way, and they enrich the gaseous matter with elements synthesized within massive stars,” explained Mukesh Singh Bisht, a PhD student at RRI.



The turbulent gas, propelled by supernovae, either escapes into the surrounding medium or cools and falls back onto the disk. This process sustains the hot gas layer observed in X-rays.



<h2 class="wp-block-heading" id="h-clues-from-enriched-gas">Clues from enriched gas</h2>



The absorbing hot gas also provided critical insights into its origins. Researchers found that it was enriched with α-elements such as sulfur, magnesium, and neon.&nbsp;



These elements, whose nuclei are multiples of helium nuclei, are produced through nuclear reactions within massive stars. They are expelled into space during supernova explosions.



“This fiery gas, at least in a few directions, seems to be enriched with large quantities of α-elements. This is a vital clue of nuclear reactions occurring within the stellar core,” said Biman Nath, an RRI faculty member and co-author of the studies.



Runaway stars - stars ejected from the Milky Way’s disk - also play a role in this process. When these stars explode as supernovae above the disk, they create pockets of α-enriched gas.



<h2 class="wp-block-heading" id="h-explaining-the-observed-signals">Explaining the observed signals</h2>



The researchers found that the absorbing gas interacts with light from distant sources, such as quasars. When aligned with these light sources, the gas absorbs specific wavelengths, creating shadow signals that match observations.



Meanwhile, the X-ray-emitting gas forms a veil around the stellar disk, produced by the continuous star formation and supernova activity within the Milky Way.



“A veil of fiery hot gas keeps engulfing the Milky Way disk as a result of the star-forming activities in the stellar disk,” Bisht added .



This dual mechanism explains both the absorbing and emitting signals detected by astronomers, offering a comprehensive understanding of the dynamics within our galaxy.



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



The faint X-ray signals emitted by the hot gas offer valuable opportunities for further study. The research team plans to test their models at other frequencies, hoping to gather more clues about the composition and behavior of the gas.



Their work also raises questions about how these processes affect the larger-scale evolution of the Milky Way. Understanding the interplay between star formation, supernovae, and the surrounding gaseous envelope could provide insights into the life cycles of galaxies.



This research not only solves a long-standing mystery but also highlights the importance of gas dynamics in shaping the Milky Way. The interplay between supernovae and the surrounding gas regulates the galaxy’s star formation and energy distribution.



The enriched gas observed in the study also points to the ongoing recycling of materials within the galaxy, where elements created in stellar cores are redistributed through explosions, fueling new generations of stars.



<h2 class="wp-block-heading" id="h-sources-of-the-milky-way-s-fiery-gas">Sources of the Milky Way’s fiery gas</h2>



The new model proposed by RRI and its collaborators sheds light on the sources of the fiery hot gas surrounding the Milky Way, offering answers to a decades-old mystery.&nbsp;



By identifying supernovae as the primary heat engines, the study reveals the complex interplay between star formation, explosions, and gas dynamics that sustain the <a href="https://www.earth.com/news/massive-galactic-explosion-provides-clues-about-galaxy-evolution/" target="_blank" rel="noreferrer noopener">galaxy’s evolution</a>.



With future research planned to explore these phenomena further, scientists are poised to gain even deeper insights into the processes that shape our galaxy and others like it.



The findings are <a href="https://iopscience.iop.org/article/10.3847/1538-4357/ad77c0" target="_blank" rel="noreferrer noopener">published</a> in two studies in <a href="https://iopscience.iop.org/article/10.3847/1538-4357/ad77be" target="_blank" rel="noreferrer noopener">The Astrophysical Journal</a>.



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Fiery gas surrounds the Milky Way, but what is heating it?

For decades, astronomers have puzzled over the intense heat and persistence of the fiery hot gas surrounding the Milky Way.&nbsp; New research by scientists from the Raman Research Institute (RRI), IIT-Palakkad, and Ohio State University sheds light on this mystery. The team has proposed a model to identify the sources responsible for heating and maintaining this extraordinary phenomenon. The Milky Way’s hidden gas reservoir The Milky Way contains more gas than stars, and this gas plays a crucial role in sustaining star formation. This massive gas reserve...

Eating certain foods can help protect us from cognitive decline later in life, according to a new study from <a href="https://www.iastate.edu/">Iowa State University</a>. The researchers found that cheese is linked to the greatest long-term protection against age-related cognitive issues, while a daily dose of red wine is associated with improvements in cognitive function.

"I was pleasantly surprised that our results suggest that responsibly eating cheese and drinking red wine daily are not just good for helping us cope with our current COVID-19 pandemic, but perhaps also dealing with an increasingly complex world that never seems to slow down," said Professor Auriel Willette. 

"While we took into account whether this was just due to what well-off people eat and drink, randomized clinical trials are needed to determine if making easy changes in our diet could help our brains in significant ways."

The researchers analyzed data from the UK Biobank on 1,787 aging adults, who were between the ages of 46 and 77 by the conclusion of the study.

The participants were tested on three separate occasions across ten years from 2006 to 2016. The individuals completed the Fluid Intelligence Test (FIT), which provides a real-time overview of an individual's ability to "think on the fly."

The volunteers also answered questions about their food and alcohol consumption during all three assessments. The Food Frequency Questionnaire was used to document the participants' intake of a wide variety of foods including fruit, vegetables, fish, cheese, bread, tea, beer, wine, liquor, and various types of meat. 

The study revealed that cheese was, by far, the most protective food against age-related cognitive decline, even late in life. The daily consumption of alcohol, especially red wine, was related to improvements in cognitive skills. The weekly consumption of lamb - but not other red meats - was also shown to improve long-term cognitive ability. 

"Depending on the genetic factors you carry, some individuals seem to be more protected from the effects of Alzheimers, while other seem to be at greater risk. That said, I believe the right food choices can prevent the disease and cognitive decline altogether," noted study co-author Brandon Klinedinst.

"Perhaps the silver bullet we're looking for is upgrading how we eat. Knowing what that entails contributes to a better understanding of Alzheimer's and putting this disease in a reverse trajectory."

The study is published in the <a href="https://www.j-alz.com/">Journal of Alzheimer's Disease</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Red wine and cheese help prevent cognitive decline

Eating certain foods can help protect us from cognitive decline...

Since 1996, a transmissible cancer has been wiping out Tasmanian devils in alarming numbers. But now, a new study from <a href="https://wsu.edu/">Washington State University</a> offers hope that the infectious <a href="http://www.earth.com/news/substituting-plant-foods-for-red-meat-reduces-the-risk-of-heart-disease/">disease</a> will not push the animals to extinction, as was predicted about ten years ago.

While most cancers remain confined in the body, the cells of devil facial tumor 1 (DFT1) can be transferred to new hosts through biting. These tumor cells are able to resist the Tasmanian devil's immune defenses and establish a new tumor that is usually fatal. 

A research team led by WSU biologist Andrew Storfer has used genomic tools of phylodynamics, which are typically used to track viruses such as SARS-CoV-2, to trace DFT1.

The results of the groundbreaking analysis suggest that the spread of the Tasmanian devil facial tumor disease is slowing down to the point that each infected animal is infecting only one additional individual or less.

"It is cautiously optimistic good news," said Storfer. "I think we're going to see continued survival of devils at lower numbers and densities than original population sizes, but extinction seems really unlikely even though it was predicted a decade ago."

The disease is still very deadly to Tasmanian devils who contract it, which usually occurs through biting and scratching during fights with infected animals. The cancer has reduced populations by as much as 80 percent since it was first discovered.

However, DFT1 appears to be reaching an equilibrium, according to the current analysis as well as evidence from previous field studies. The researchers say that, armed with this new evidence, managers should re-consider the practice of releasing captive-bred devils into the wild.

"Active management may not be necessary and could actually be harmful," said Storfer. "It looks like the devil populations are naturally evolving to tolerate and possibly even resist the cancer. By introducing a whole bunch of genetically naïve individuals, they could breed with the wild individuals, basically mix up the gene pool and make it less well-adapted."

The captive-bred individuals who have developed no resistance to DFT1 could also increase transmission of the disease among different groups of devils.

The study is published in the journal <a href="https://www.sciencemag.org/">Science</a>.

 ---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Tasmanian devils are overcoming a deadly pandemic

Since 1996, a transmissible cancer has been wiping out Tasmanian...

By just four months of age, the cognitive abilities of ravens may be comparable to those of adult great <a href="http://www.earth.com/news/great-apes-understand/">apes</a>, according to a new study published in <a href="https://www.nature.com/srep">Scientific Reports</a>. 

Researchers have demonstrated that young ravens are intellectually advanced in how they interact with others, and also in how they execute tasks which test their understanding of the physical world.

A team of experts led by Simone Pika analyzed the cognitive skills of eight hand-raised ravens at four, eight, 12, and 16 months of age using a series of tests. 

The researchers were particularly focused on the following skills: spatial memory; object permanence - understanding that an object still exists when it is out of sight; relative numbers and addition; and the ability to communicate with and learn from a human.

The study revealed that the cognitive performance of ravens was relatively stable from four to 16 months of age. This finding indicates that the cognitive skills of the young birds have nearly or fully developed by four months of age. 

At four months, ravens become more and more independent from their parents and start to discover their ecological and social environments. 

While task performance varied among individuals, the birds generally had the highest scores in relative numbers and addition, and the lowest scores on spatial memory. 

In a previous study, 106 chimpanzees and 32 orangutans had completed similar tasks. The current investigation revealed that the cognitive performance of the ravens was very similar to that of both orangutans and chimpanzees.

The research provides evidence that ravens may have evolved general, sophisticated cognitive skills like great apes. The experts theorize that ravens developed these skills in response to living in a constantly changing environment where survival and reproduction are reliant on cooperation and alliances between ravens. 

The researchers emphasize, however, that the performance of the ravens observed for the study may not be representative of the species in general.

The study is published in the journal <a href="https://www.nature.com/srep">Scientific Reports</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Ravens have sophisticated cognitive skills at four months old

By just four months of age, the cognitive abilities of...

In a new study, experts report that COVID-19 worsens the symptoms of mental illness and increases substance abuse. Furthermore, social <a href="http://www.earth.com/news/isolation-may-lead-to-years-of-depression-among-children/">isolation</a> can cause many different adverse psychiatric effects that are known to be linked to loneliness.

The potential neurological complications of COVID-19 are alarmingly concerning, but many of the details remain unclear. To investigate, the <a href="https://acnp.org/">American College of Neuropsychopharmacology</a> supported three separate workshops to examine the psychiatric consequences of the pandemic.

A workshop led by Dr. Mark Weiser, Chief Psychiatrist at the Sheba Medical Center and Professor of Psychiatry at the Sackler School of Medicine at Tel Aviv University, was focused on efforts to improve the psychiatric outcomes of COVID-19. 

The experts reviewed early studies of neurological complications in COVID-19 patients across China. They also discussed strategies that have been developed in Israel and Spain to safely treat hospitalized patients with both psychiatric illness and COVID-19 infection.

"The COVID19 pandemic has posed major difficulties in the treatment of severely ill psychiatric patients, some of whom present with challenging combinations of behavioral and respiratory symptoms, with difficulties keeping social distancing, hygiene and wearing masks," said Dr. Weiser. "In non-psychiatric patients we are beginning to learn about the long-term psychiatric sequelae of COVID-19 infection."

Dr. Nora Volkow, Director of the National Institute on Drug Abuse (NIDA), led a group that discussed the specific vulnerabilities of individuals with substance abuse who contract COVID-19. For example, COVID-19 may interact with substance abuse to worsen the severity of illness. 

"The U.S. is now facing two intersecting health crises, the ongoing opioid overdose epidemic and the COVID-19 pandemic. Regrettably, each has the potential to exacerbate the effects of the other," said Dr. Volkow. 

"NIDA has swiftly responded to the COVID-19 crisis by supporting research in areas of basic science, prevention, treatment, epidemiology, and implementation, particularly at the intersection with SUD. I am hopeful that [this] will contribute to lessening the impact of the collision between the opioid and COVID-19 crises."

Dr. Dilip Jeste, the Senior Associate Dean for Healthy Aging and Senior Care at UC San Diego, led a team that examined the potential impact of social isolation on individuals with psychiatric illness, as well as the effects on the general population as a whole. 

Loneliness is known to cause physical health impacts that are similar to those caused by smoking and obesity. Loneliness is also associated with an increased risk of depression, substance abuse, suicide, and dementia."The Covid-19 pandemic has moved the already important need for research into neurobiology and interventions for loneliness and social isolation to the front burner," said Dr. Jeste.

The findings were presented at the 59th Virtual Annual Meeting of The American College of Neuropsychopharmacology.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

The psychiatric impacts of the COVID-19 pandemic are far-reaching

In a new study, experts report that COVID-19 worsens the...

The meaning of happiness depends on where you live. In a new study from <a href="https://www.ucr.edu/">UC Riverside</a>, researchers have analyzed how people define and measure happiness across 63 different countries. The experts found that the meaning of happiness varies depending on where you live.

Most happiness studies have been focused on the western world, but these concepts are not universal. According to the researchers, happiness is tied to independence in the West, while Eastern happiness is closely related to interdependence.

"Accordingly, the prevailing conceptualization of happiness is consistent with a historically Protestant, self-centered worldview that emphasizes personal worthiness and hard work to obtain positive outcomes, and sees happiness as a personal achievement," wrote  the study authors.

"The East Asian world view has been described as one in which the self is more entwined with others, such that personal happiness depends on position connections in social relationships," explained study lead author Dr. Gwen Gardiner. 

"The Eastern ideologies of Buddhism, Taoism, and Confucianism emphasize the interconnectedness of everyone and everything, prioritizing harmony and balance over individual achievement."

For example, Koreans talk about "happiness" and "family" in the same breath. Furthermore, past research has shown that even a smile - the most obvious measure of happiness - takes on a different meaning in the East than it does in the West.

To investigate, the UC Riverside researchers set out to determine which tests of happiness would be most effective among 15,368 participants from 63 countries all over the world, including North and Central America, Canada, Africa, Southeast Asia, and the Middle East. 

The study was focused on the Subjective Happiness Scale developed in the United States and the Interdependent Happiness scale developed in Japan. The volunteers were surveyed online in 42 different languages.

The Western measure proved to be the most reliable scale for measuring happiness among people in Western European countries including Belgium, Denmark, and the United Kingdom. On the other hand, the Western scale was not as effective at determining happiness in Eastern countries such as China, Japan, and Vietnam. This subjective measure of happiness also performed poorly in African countries.

The Eastern measure, which was focused on interdependence, was found to be most reliable in Asian countries including Japan and South Korea. The study showed that this interdependent measure of happiness did not vary nearly as much across countries as the independent measure. 

Both measures were highly reliable in the United States and Japan, which was particularly interesting to the researchers. "For us, this result was particularly interesting and surprising because, typically, the U.S. and Japan are the prototypical countries used to highlight cross-cultural differences in cultural psychology," said Dr. Gardiner. "But in this case, they were much more similar to each other."

The study is published in the journal <a href="https://journals.plos.org/plosone/">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

The meaning of happiness depends on where you live

The meaning of happiness depends on where you live. In...

Asian honey bees collect animal feces and place it near the entrances of their nest to deter giant hornets, according to research from the <a href="https://www.uoguelph.ca/">University of Guelph</a>. Hornets were found to be less likely to land on nest entrances with large amounts of dung, and those that did land spent 94 percent less time chewing at the entrance to reach their prey.

While honey bees have evolved a collection of strategies to ward off predators, including synchronized visual displays, the current study is the first of its kind to document their use of tools.

One single sting from an Asian giant hornet contains about seven times as much venom as that of an ordinary honeybee. In 2019, "murder" hornets were first discovered in North America, appearing in British Columbia and Washington. 

"Giant hornets are the biggest wasps that threaten honeybees. They are one of their most significant predators," said study co-author Professor Gard Otis, who conducted the research in Vietnam. He said the hornets could ultimately carry out similar honeybee hive raids in North America as well. 

Professor Otis explained that the hornets recruit nestmates to participate in organized attacks on honey bee nests. They kill the bees and carry away larvae and pupae to feed their own developing brood.

Beekeepers in Vietnam normally attempt to control hornets by standing guard and swatting away individuals to prevent them from escalating their attacks. "If you allow them, a group of hornets assembles, attacks the colony and takes over," said Professor Otis. "The beekeepers control them every day by moving among their hives and whacking hornets."

The researchers discovered that honey bees are not only aware of the impending danger, but also proactively prepare for the raids by collecting animal dung and applying it to hive entrances.

"This study demonstrates a fairly remarkable trait these bees have to defend themselves against a really awful predator," said study lead author Heather Mattila, who is currently a Biology professor at Wellesley College.

Unlike their Asian counterparts, honeybees in Canada lack similar defenses, said Professor Mattila. This means that beekeepers in North America will have to rely on destroying the hornet nests, or hope that the climate will limit the spread of the hornets. Matilla noted that honey bees commonly found in Canada have not yet had the opportunity to evolve defenses. "It's like going into a war cold."

Professor Otis initiated the research after asking Vietnamese beekeepers about dark spots at the hive entrances of Asian honeybees. One of the beekeepers explained that the substance was buffalo dung, and all of the beekeepers linked these hive spots with hornets. 

"Dung collection is a behavior never previously reported for honeybees, and no one had studied the phenomenon," said Professor Otis.

With funding from the National Geographic Society, the researchers gathered dung from water buffalo, chickens, pigs, and cows, and placed it in mounds near a collection of beehives. By the end of the day, about 150 bees had visited the piles, showing a preference for the stronger smelling manure of pigs and chickens.

Individual bees were marked so that they could be identified once they were back at their hives. Moments after collecting the manure, the bees were seen applying it at hive entrances.

The study revealed that hornets spent less than half as much time at nest entrances with moderate to heavy dung spotting. They were also less likely to launch mass attacks on the more heavily spotted hives.

It is not yet clear what deters the hornets. They may simply be repelled by the odor, or the smell of the dung may mask the signature scents emitted by honey bees.

In one experiment, the researchers extracted the chemical pheromone applied by hornets when marking their target hive and applied it to honey bee nest entrances. The honey bees quickly responded by distributing dung throughout the hive.

"The use of animal feces by Asian honey bees showcases the impressive suite of weapons they have evolved to defend their colonies against one of their most dangerous predators," wrote the study authors. "It also highlights the reasons why European honey bees, which don't have these defenses, succumb to giant hornets so easily when they are introduced into each other's range."

The study is published in the journal <a href="https://journals.plos.org/plosone/">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

Honey bees use animal poop to deflect deadly hornet attacks

Asian honey bees collect animal feces and place it near...

Current conservation practices that are aimed at restoring nature to its historical state will not be enough to resist climate change. In a new report, leading ecologists and <a href="http://www.earth.com/news/urgent-climate-action-could-save-and-improve-millions-of-lives/">climate</a> scientists propose a more flexible and dynamic approach to nature conservation.

According to the experts, allowing species to migrate naturally, or even be moved to more suitable habitats, could help to reduce the negative impacts of climate change. The study authors also noted that genetic material could be preserved from species that are at the greatest risk of extinction so that the plants could eventually be re-established under more suitable conditions.

The study draws from previously published research which found that the home ranges of many plants and animals are shifting away from the equator and toward the poles as temperatures rise. 

Professor Bob Scholes is an ecologist in the Global Change Institute at the University of the Witwatersrand. He explained that the question of whether to intervene to protect species or not is a heated debate in conservation circles. 

"Interestingly, the animal people are much happier in moving things around than the plant people, who are rather conservative, so to speak. This paper, in a way, was intended to shock the conservationists out of the state of just continuing doing things as they have always done," said Professor Scholes.

The researchers argue that nature conservation strategies need to become more flexible and dynamic in how they address the impact of climate change on natural habitats, genetic resources of plants, the composition of species, and the functioning of ecosystems. Otherwise, any apparent short-term biodiversity gains could be lost in the decades to follow as a result of climate change.

Currently, none of the 2020 Aichi Biodiversity Targets of the Convention on Biodiversity Diversity explicitly address the urgency of climate change mitigation as a critical component of biodiversity conservation. 

For example, the study authors refer to Aichi Target 12, which aims to prevent the extinction of all known threatened species and improve their conservation status. A traditional approach to conservation seems to be unrealistic considering that climate change has already significantly altered the home ranges of many species. "Even very low levels of future climate change are projected to reduce the range size of a substantial fraction of species and put many species at high risk of extinction," wrote the researchers.

Professor Guy Midgley is an experts on global change and biodiversity in the Department of Botany and Zoology at Stellenbosch University. He noted that several prominent measures to slow the rate of rising CO2, such as planting more trees, can conflict directly with the aims of biodiversity conservation in Africa.

"Large-scale afforestation of rich grassland ecosystems in Africa will not only threaten their unique shade-averse biodiversity, but also limit livelihoods options and reduce vital ecosystem services, like the delivery of freshwater, from these ecosystems," said Professor Midgley.

There are complex interactions between ecosystem processes, atmospheric composition, and climate which we do not yet understand, explained the study authors. When this uncertainty is combined with human population growth, greater consumption, over-exploitation, and pollution, it becomes clear that there is cause for serious concern.

"Nature is clearly resilient to shocks like climate change, given enough time, and the earth's biological diversity has shifted and changed in response to global crises in the deep geological past, like meteorite strikes," said Professor Midgley. "It is therefore crucial for us to work with the natural forces that provide resilience rather than limiting conservation thinking to achieving fixed ideals based on our limited historical perspectives of natural ecosystems."

The study is published in the journal <a href="https://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Nature conservation must become more dynamic

Current conservation practices that are aimed at restoring nature to...

A new study from <a href="https://www.monash.edu/">Monash University</a> has revealed that nearly half of all insects that are native to the Southern Ocean Islands have become flightless over time. On some of these remote islands, almost all of the insects have lost the ability to <a href="http://www.earth.com/news/bats-have-superior-acoustic-perception-but-still-fly-into-walls/">fly.</a>

When the researchers investigated the potential factors driving this flightlessness, they confirmed a 160-year-old theory by Charles Darwin that flightlessness evolved in response to wind. 

"Of course, Charles Darwin knew about this wing loss habit of island insects," said study lead author and PhD candidate Rachel Leihy.

"He and the famous botanist Joseph Hooker had a substantial argument about why this happens. Darwin's position was deceptively simple. If you fly, you get blown out to sea. Those left on land to produce the next generation are those most reluctant to fly, and eventually evolution does the rest. Voilà."

Many scientists, including Hooker, questioned Darwin's theory on flightlessness and simply believed that he got it wrong. However, most of these debates have overlooked the sub-Antarctic islands where flightlessness is evolving the most rapidly, and these are some of the windiest places on Earth.

"If Darwin really got it wrong, then wind would not in any way explain why so many insects have lost their ability to fly on these islands," said Leihy. The researchers set out to analyze every idea that has been proposed to explain flight loss among insects.

"Terrestrial species on islands often show reduced dispersal abilities. For insects, the generality of explanations for island flight loss remains contentious. Although habitat stability is considered the most plausible explanation, others are frequently highlighted," wrote the study authors.  "Adopting a strong inference approach, we examined the hypotheses proposed to account for the prevalence of flightlessness in island insect assemblages, for a region long suspected to be globally unusual in this regard - the Southern Ocean Islands (SOIs)." 

"Combining comprehensive faunal inventories, species' morphological information, and environmental variables from 28 SOIs, we provide the first quantitative evidence that flightlessness is exceptionally prevalent among indigenous SOI insect species."

The study showed that no other ideas besides Darwin's wind theory could explain the extent of flight loss in sub-Antarctic insects. 

"The outcomes redirect attention to Darwin's wind hypothesis. They suggest, however, that wind selects for flightlessness through an energy trade-off between flight and reproduction, instead of by displacement from suitable habitats," explained the researchers.

Their findings suggest that windy conditions make insect flight more difficult and energetically costly. As a result, insects stop investing in flight and invest more in resources for survival and reproduction.

"It's remarkable that after 160 years, Darwin's ideas continue to bring insight to ecology," said Leihy. 

Study co-author Professor Steven Chown concluded that the Antarctic region is an extraordinary laboratory in which to resolve some of the world's most enduring mysteries and test some of its most important ideas.

The study is published in the journal <a href="https://royalsocietypublishing.org/journal/rspb">Proceedings of the Royal Society B</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Darwin knew why insects would give up their ability to fly

A new study from Monash University has revealed that nearly...

As a result of conflict with hornets, some honey <a href="http://www.earth.com/news/measuring-pesticides-in-honey-may-help-protect-bees/">bees</a> have evolved a powerful defense mechanism that is contagious throughout the colony. Guard bees use an intimidating visual approach, known as an "I see you" (ISY) warning signal, to discourage hornets from launching an attack. 

The ISY signal involves guard bees shaking their abdomens sideways, and the movement speeds up as the threat intensifies. The alarm also alerts the bee colony to an urgent need for reinforcements.

Even the so-called murder hornets, or Asian giant hornets, recognize the ISY signal as a warning to back off. The hornets are aware that ISY can lead to a violent counter attack by a mass of honey bees that form a "heat ball," trapping the victims inside of a deadly combination of heat, carbon dioxide, and stinging.

A team of biologists at the <a href="https://ucsd.edu/">University of California San Diego</a> has investigated interactions between Asian honey bees and hornets. The study shows, for the first time, that the ISY signal is visually driven and contagious across the bee colony. 

"The beauty of the ISY signal is that hornets are only deterred if enough defending bees quickly gather to synchronously produce the signal, thereby showing the hornet that further attack is futile," said study senior author Professor James Nieh. He explained that the ISY signal is contagious and attracts other defenders who immediately copy the signal and rush towards the signaler, even if they cannot detect any danger. 

"Hornets give off smell and sound but we found that the visual of a hornet alone can elicit the signal, which was not known," said Nieh. Previously, experts had speculated that guard bees may produce a pheromone to alert the colony to an approaching predator. 

"Using just a contagious visual signal is better because guards who are too far away to smell or hear the hornet can immediately head towards the threat. In some ways, it's like a fast chain reaction," said Professor Nieh.

Since animal communication often contains errors, and a false ISY alarm could rapidly spread within the colony, Professor Nieh compares the concept of ISY to "fake news." Unlike many people, the honey bees are extremely selective about what they consider a true threat. Using an iPad to display videos, the researchers found that the visual appearance and motion of the hornet alone could trigger ISY signals. However, the honey bees did not respond to visual displays of a butterfly.

The bees turned out to be even more particular about what they considered to be a real ISY signal. "We played back videos of bees performing ISY signals at different speeds, but only the correct bee image at the right speed caused other bees to respond. This helps keep the signal spread honest," said Professor Nieh. He thinks that evolution has limited errors in communication among the honey bees because of how very costly such errors could become, and believes that the findings provide a cautionary tale about fake news.

"Individuals in a honey bee colony are completely interdependent. They can't go out and make it on their own. Cooperation is paramount, especially when faced with a large, heavily armored predator like hornets," said Professor Nieh. "A couple of hornets can kill thousands of bees in a single day. Yet through teamwork that correctly produces synchronized, massed ISY signals, they can get the hornet to back off without harming a single bee. Maybe that's a lesson for us all."

The study is published in the <a href="https://besjournals.onlinelibrary.wiley.com/journal/13652656">Journal of Animal Ecology</a>.

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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

Honey bees use a contagious warning signal to scare off hornets

As a result of conflict with hornets, some honey bees...

Arctic ground squirrels recycle their own nutrients . To survive the extremes of a long winter hibernation, Arctic ground squirrels recycle nutrients within their own bodies, according to a study from the <a href="https://www.uaf.edu/">University of Alaska Fairbanks</a>. The researchers examined ground squirrels in the lab for two years, and discovered a flow of <a href="http://www.earth.com/news/nutrients-in-seabird-poop-transformed-the-falkland-islands/">nutrients</a> during hibernation that is almost completely undetectable.

The muscles of the ground squirrels slowly break down in temperatures just above freezing. During this process, the animals manage to convert the nitrogen that is released into amino acids. The squirrels use these amino acids to produce protein in tissues such as lungs, kidneys, and skeletal muscle. Arctic ground squirrels recycle their own nutrients 

The findings may ultimately help to unravel some of the biggest mysteries of hibernation, providing new insights in human medicine. Scientists have long been intrigued by the body chemistry of 

Arctic ground squirrels take hibernation to the extreme. They slow their metabolism and cool their bodies down to subfreezing temperatures for up to eight months out of the year. During this time, the squirrels breathe just once per minute.

Yet despite going so long without food or water and barely even breathing, hibernating ground squirrels are uniquely resilient to muscle loss and long-term cellular damage. This makes the animals very intriguing to scientists.

"They're just this extreme hibernator, and during the time they hibernate they don't eat, they don't drink, and they don't have any underlying injuries to their bodies," said study lead author Sarah Rice, who is a PhD student at UAF's Institute of Arctic Biology.

Experts had previously found evidence that hibernators recycle urea, a waste product that is excreted in urine. Researchers had also speculated that hibernating animals recycle nitrogen to retain their body tissue during extreme fasting. The new study has confirmed this theory for the first time. 

Understanding more about the body chemistry of hibernating animals could contribute to a variety of potential medicines for humans, including treatments that could help heal traumatic injuries or those that would prevent muscle loss in cancer patients and the elderly. 

Rice said that by analyzing how hibernators keep themselves healthy, the approach offers a different perspective than therapies that often focus on overcoming and treating injuries. "It's fun to kind of turn that idea on its head. Instead of studying what goes wrong in the world, it's important to study what goes right."

The study is published in the journal <a href="https://www.nature.com/natmetab">Nature Metabolism</a>.

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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

Arctic ground squirrels recycle their own nutrients

Arctic ground squirrels recycle their own nutrients . To survive...

Scientists at the <a href="http://www.izw-berlin.de/">Leibniz Institute for Zoo and Wildlife Research</a> have found the key to solving a cheetah-farmer conflict in central Namibia. In collaboration with local <a href="http://www.earth.com/news/farmers-can-help-make-crops-more-resilient/">farmers</a>, the researchers found that moving cattle herds out of cheetah hotspots reduced losses of livestock by more than 80 percent.

One of the most important refuges for the declining global cheetah population is in rural central Namibia, where the large African cats live on privately owned farmland rather than in protected areas. The proximity causes conflict with cattle farmers because the cheetahs prey on their calves.

"This conflict is an important reason for the decline of the Namibian cheetah population, thus solutions to this conflict that are viable for both farmers and cheetahs needed to be developed," said study co-author Dr. Jörg Melzheimer, who is a spatial ecologist involved with the Leibniz-IZW Cheetah Research Project (CRP) in Namibia.

"Supported by the farmers we caught more than 250 cheetahs and equipped many of them with high resolution GPS collars to thoroughly analyze their spatial behavior," explained study co-author Dr. Bettina Wachter.

Overall, the collars recorded several million individual locations. The researchers analyzed this massive dataset, and identified two distinct spatial tactics of male cheetahs. They found that about one-third of the males own small territories where they mark 20 to 40 prominent landmarks such as trees or rocks with their scent. The other males, called floaters, do not own a territory but roam over vast areas. 

"The territories are not contiguous, but spread evenly across the landscape with a lot of open space between them," said Dr. Melzheimer. "Floaters visit the core areas of the territories frequently to gather information on the current territory holders and to consider their chances of queueing for territory ownership or winning a fight for the territory. At the same time, the females regularly visit these areas in search of mating partners." 

As a result, the core areas of the territories serve as communication hubs for the local cheetah population and are hotspots of cheetah activity. The communication hubs represent areas with a high local predation risk for livestock. On the other hand, the remaining land in between the hotspots, which makes up 90 percent of the total area,  has only a low predation risk. 

The experts mapped out the hotspots and determined that 30 percent of the cattle farmers are affected to varying degrees by cheetah activity, even though these communication hubs cover only a small part of the study area.

Based on the findings, the Leibniz-IZW scientists collaborated with the farmers to design an experiment. Breeding herds with young calves that were located within the newly discovered communication hubs were moved to areas with much less cheetah activity. 

"These experiments were highly successful and reduced the livestock losses of farmers by more than 80 percent," said the researchers. "We demonstrated that cheetahs did not follow the breeding herds, but maintained their spatial system of communication hubs and instead preyed on wildlife occurring naturally on the farms in the hotspot locations. This implies that there are no problem cheetahs, but problem areas with high predation risk."

The collaboration between the scientists and farmers was based on the concept of a "real-world laboratory," where they worked together to formulate research questions and to determine potential solutions to the conflict. 

"This allowed us to work as partners on a real-world problem and to find solutions together, as well as to communicate them in the relevant communities, thereby helping to spread the successful application of the solutions," said Dr. Melzheimer. "The future of the cheetah does not lie in the hand of scientists or conservationists, it depends on all stakeholders working together on viable solutions."

The study is published in the journal <a href="https://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.

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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

Using a real-world laboratory to resolve cheetah-farmer conflict

Scientists at the Leibniz Institute for Zoo and Wildlife Research...

A team of experts has developed a device that imitates the hearing capabilities of mosquitoes to identify their <a href="http://www.earth.com/news/rare-species-discovered-in-the-deep-sea-near-japan/">species</a> and sex. The researchers, led by Tim Ziemer of the Bremen Spatial Cognition Center at the <a href="https://www.uni-bremen.de/en/">University of Bremen</a>, hope the bioinspired detector will someday be used in the field to save lives.

The team created an imitation "ear" which mimics the organs that mosquitoes use to hear. The detector allowed the experts to identify a mosquito's species and sex based on sound, just like these insects do themselves.

Mosquitoes use tiny hairs on their antennae, which feed information to 15,000 nerve fibers, to help them hear. Their remarkable sense of hearing also helps the insects to monitor their own position and speed.

To identify other individuals, mosquitoes emit sounds that even they cannot hear. They listen to how those sounds distort and combine with the wing beats of others in unique ways that are dependent on the individual's sex and species.

The new detector uses the same approach by imitating the lower part of a mosquito's antenna, which is responsible for transforming the emitted sound into something that can be heard. After the detector transforms the sound, a combination of machine learning and speech recognition tools help differentiate between species and sex.

The detector may ultimately be used to identify mosquitoes in the field, where they would be selectively targeted with pesticides. Beyond reducing pesticide use, the device could revolutionize the way that mosquitoes are controlled and help stop the spread of viruses that cause malaria, dengue fever, and other deadly diseases.

Furthermore, the detector could inform individuals of when potentially disease-carrying mosquitoes are nearby. According to the World Health Organization, mosquito bites cause more than one million deaths every year.

Ziemer will present the research at the 179th Meeting of the <a href="https://acousticalsociety.org/">Acoustical Society of America</a>.

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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

New device identifies mosquitoes using only sound

A team of experts has developed a device that imitates...

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



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



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Flu viruses are more flexible than expected

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



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



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



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



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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Detecting mercury contamination with the tap of a finger

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



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



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



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



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



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



Video/ Image Credit: European Space Agency&nbsp;



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



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

Kainji Lake in north central Nigeria

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



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



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



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



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



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



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



Video Credit: Amanda Nguyen/University of Illinois



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



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

Designing crops that can beat the heat

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



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



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



Video Credit: ACS Reactions



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



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How does salt makes things taste better?

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



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



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



Video/ Image Credit: ESA



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



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Santiago, Chile in South America

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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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



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Remote sensing will revolutionize the way we monitor trees

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



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



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



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



Video Credit: ESA&nbsp;



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



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The city of Dublin on Ireland's east coast

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



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



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



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



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"] Today's Video of the Day from the...

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



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



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



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



Video Credit: NASA Goddard



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



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

Wetlands are a major source of methane emissions

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

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



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



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



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



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



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



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



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



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



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



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

The rapid retreat of the Columbia Glacier

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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

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



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



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



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



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



Video Credit: Stowers Institute for Medical Research&nbsp;



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



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

How the immune system responds to injury

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

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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

2022 illustrated the consequences of a warming climate

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Earth,Like,Exoplanet,3d,Render

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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



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

Tiger sharks are shifting poleward as temperatures rise

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