Most people have heard that black holes slowly lose mass through cosmic decay, radiating tiny amounts of energy. This idea has circulated for decades and suggests that nothing is truly permanent.



Experts now propose that other extremely dense <a href="https://www.earth.com/news/magnetar-flares-create-gold-platinum-uranium-in-seconds/" target="_blank" rel="noreferrer noopener">objects</a> might follow a related path. Their findings reveal a shorter timeline for everything, though not short on any human timescale.



Heino Falcke, a black hole researcher at <a href="https://www.ru.nl/en" target="_blank" rel="noreferrer noopener">Radboud University</a>, stands at the forefront of this investigation. He collaborated with quantum physicist Michael Wondrak and mathematician Walter van Suijlekom to figure out how quickly these processes might happen.



<h2 class="wp-block-heading" id="h-new-view-on-cosmic-decay">New view on cosmic decay</h2>



Scientists have long known about ideas related to black hole evaporation through a process first outlined by <a href="https://projecteuclid.org/journals/communications-in-mathematical-physics/volume-43/issue-3/Particle-creation-by-black-holes/cmp/1103899181.full" target="_blank" rel="noreferrer noopener">Stephen Hawking</a>. The classic picture involves a black hole shedding mass over an incredibly long interval, eventually leaving no trace. 



Recent <a href="https://arxiv.org/abs/2410.14734" target="_blank" rel="noreferrer noopener">work</a> suggests that dense objects like neutron stars and white dwarfs might follow similar decay patterns, though at a snail’s pace.



Researchers wondered how these timelines compare to old predictions. They took the mathematics behind black hole evaporation and applied it to other <a href="https://www.earth.com/news/deep-space-cosmic-rays-from-supernova-sparked-rapid-earth-evolution/" target="_blank" rel="noreferrer noopener">celestial bodies</a>. The ultimate result? Those bodies still vanish, just more rapidly than many figured before.



<h2 class="wp-block-heading" id="h-faster-fade-for-dense-objects">Faster fade for dense objects</h2>



“So the ultimate end of the <a href="https://www.earth.com/news/monster-in-the-shadows-giant-black-hole-emerges-from-cosmic-dust/" target="_blank" rel="noreferrer noopener">universe</a> comes much sooner than expected, but fortunately it still takes a very long time,” said Heino Falcke. 



That statement might sound contradictory at first, but it sums up the team’s surprising takeaway. Ultimately, for everyday life, these timescales are beyond huge.



There is even a calculation for the disappearance of the Moon. The process would drag on for around 10^90 years. The details rest on <a href="https://www.colorado.edu/physics/research/gravitational-physics" target="_blank" rel="noreferrer noopener">gravitational physics</a> equations and the idea that curving spacetime might gradually convert mass into particles that eventually slip away.



<h2 class="wp-block-heading" id="h-what-neutron-stars-and-white-dwarfs-reveal">What neutron stars and white dwarfs reveal</h2>



Neutron stars have densities so immense that a teaspoon of their material on Earth would outweigh a mountain. Given their density, cosmic decay could affect these stellar remnants, causing them to evaporate too.



The group uncovered that neutron stars might take about the same time to fade as <a href="https://science.nasa.gov/universe/black-holes/types/" target="_blank" rel="noreferrer noopener">stellar black holes</a> in the same mass range.



These results highlight a fresh perspective on gravitational physics. They show that events at a star’s surface could mirror those at the fringes of a black hole’s boundary, with subtle differences in how each body might reabsorb part of its own radiation.



<h2 class="wp-block-heading" id="h-why-denser-objects-lose-mass-faster">Why denser objects lose mass faster</h2>



Dense <a href="https://www.earth.com/news/blazar-cosmic-objects-defy-classification-can-rapidly-change-its-identity/" target="_blank" rel="noreferrer noopener">objects</a> lose mass through minute particle streams. More density means an object’s gravitational pull is stronger, which changes how energy flows away. 



Draining that stored energy requires creative math, plus insights from quantum mechanics and general relativity.



A white dwarf, much less dense than a neutron star, might hold out for around 1078 years. That timeline sounds wildly big, yet it is significantly shorter than earlier guesses in the range of 101100 years.



<h2 class="wp-block-heading" id="h-cosmic-decay-physics-and-math">Cosmic decay: Physics and math</h2>



“By asking these kinds of questions and looking at extreme cases, we want to better understand the theory, and perhaps one day, we unravel the mystery of <a href="https://www.earth.com/news/black-hole-radiation-may-actually-be-a-catalyst-for-life/" target="_blank" rel="noreferrer noopener">Hawking radiation</a>,” said Walter van Suijlekom, professor of mathematics at Radboud University.



That blend of math, astrophysics, and quantum ideas drives this line of work.



Probing new models can spur lively debates. Some wonder if there are hidden factors that might stretch these rates. 



Others note that experimental tests in labs are tricky at best because these processes are far too slow to detect directly.



Any attempt to grasp cosmic timescales boggles the mind. Changes in star systems usually unfold in billions of years. 



These calculations push things far beyond that, highlighting a universe that still has an expiration, even if it is unimaginably distant.



Better knowledge of exotic decay can guide how we interpret ancient remnants. If these estimates hold, the universe’s inventory of black holes, <a href="https://www.earth.com/news/when-two-neutron-stars-collide-kilonova-explosion-very-bad-things-happen/" target="_blank" rel="noreferrer noopener">neutron stars</a>, and other dense bodies eventually runs out far earlier than some old predictions claimed.



<h2 class="wp-block-heading" id="h-revising-cosmic-timelines">Revising cosmic timelines</h2>



Revising cosmic timelines does not upend everyday astronomy, since these events are so far off. Yet it refines how scientists tally the lifetime of matter. 



Anyone who assumes that a star corpse lasts forever might have to rethink that stance now.



It also raises a question about the deep structure of spacetime. If space itself nudges these bodies toward decay, the nature of gravity might be more flexible than once supposed. 



Each object’s density appears to determine how quickly it joins the dust bin of cosmic history.



The study is published in the <a href="https://arxiv.org/abs/2410.14734" target="_blank" rel="noreferrer noopener">Journal of Cosmology and Astroparticle Physics</a>.



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Cosmic decay: The universe will end sooner than we thought

Most people have heard that black holes slowly lose mass through cosmic decay, radiating tiny amounts of energy. This idea has circulated for decades and suggests that nothing is truly permanent. Experts now propose that other extremely dense objects might follow a related path. Their findings reveal a shorter timeline for everything, though not short on any human timescale. Heino Falcke, a black hole researcher at Radboud University, stands at the forefront of this investigation. He collaborated with quantum physicist Michael Wondrak and mathematician Walter van Suijlekom...

Socialization makes a big difference in the life expectancy of adult female giraffes, according to a new study from the <a href="https://www.uzh.ch/en.html">University of Zurich</a>. The experts have found that female giraffes who spend more time with other females have a higher chance of survival than those who are less sociable.

For over five years, a research team led by Monica Bond has been conducting the largest study to date of a giraffe population. The site of the investigation, which is in the Tarangire region of Tanzania, spans more than 1,000 square kilometers and includes multiple social communities with hundreds of adult female members.

The researchers determined that the benefits of socializing outweigh the effects of environmental factors or human presence on the survival of female giraffes.

While group formations change throughout the day, adult females were found to maintain many special friendships over the long term.

"Grouping with more females, called gregariousness, is correlated with better survival of female giraffes, even as group membership is frequently changing," said Bond. "This aspect of giraffe sociability is even more important than attributes of their non-social environment such as vegetation and nearness to human settlements."

Beyond the threats of poaching and wildlife trafficking, adult female giraffe mortality is primarily caused by disease, stress, and malnutrition. 

"Social relationships can improve foraging efficiency, and help manage intraspecific competition, predation, disease risk and psychosocial stress," said study senior author Professor Barbara König. 

For example, female giraffes may team up with other females to obtain information about the best places to find food. Socializing in larger groups may also lower stress levels, reduce harassment from males, and provide help in caring for young.

The team analyzed the social behaviors of the wild giraffes using network algorithms. The analysis showed that giraffes are surprisingly similar to humans and other primates in their social habits.

"It seems to be beneficial for female giraffes to connect with a greater number of others and develop a sense of larger community, but without a strong sense of exclusive subgroup affiliation," said Bond.

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

Female giraffes live longer when they stick together

Socialization makes a big difference in the life expectancy of...

Tourists may be carelessly spreading COVID-19 to wild mountain gorillas by taking selfies with them. A team of researchers at <a href="https://www.brookes.ac.uk/">Oxford Brookes University</a> analyzed nearly 1,000 Instagram posts containing photos taken with mountain gorillas in East <a href="https://www.earth.com/news/shipwrecked-ivory-sheds-new-light-on-african-forest-elephants/">Africa</a>.

The study revealed that most of the tourists were close enough to the animals to transmit a virus or infection, and they were not wearing face masks. 

"The risk of disease transmission between visitors and gorillas is very concerning. It is vital that we strengthen and enforce tour regulations to ensure gorilla trekking practices do not further threaten these already imperiled great apes," said study lead author Gaspard Van Hamme.

In January 2021, captive gorillas at San Diego Zoo tested positive for SARS-CoV-2, providing new evidence that the COVID-19 pandemic can affect great apes. 

"In the photos we analyzed, we found that face masks were rarely worn by tourists visiting gorillas and that brings potential for disease transmission between people and the gorillas they visit," said study co-author Dr. Magdalena Svensson. "With people all over the world getting more used to wearing face masks we have hope that in the future wearing face masks will become common practice in gorilla trekking."

Mountain gorillas are native to East Africa, and can currently be found in the Democratic Republic of Congo, Uganda, and Rwanda. After decades of threats from human activities, gorilla numbers have started to bounce back in recent years. There are now an estimated 1,063 individuals.

"This research provides a valuable perspective on how much tourists are willing to share their too close encounters with mountain gorillas through Instagram, which creates expectations for future tourists," explained Dr. Gladys Kalema-Zikusoka.

"It highlights a great need for responsible tourism to provide adequate protection while minimizing disease transmission, especially now during the COVID-19 pandemic."

Trekking is a valuable way to generate income to support mountain gorilla conservation. At the same time, large numbers of visitors can negatively impact the wildlife and their environment.

One of the main guidelines for visitors is to maintain a minimum distance of seven meters away from the gorillas, but the new research shows that such guidelines are not adequately followed or enforced.

Russell A. Mittermeier is the Chair of the IUCN/SSC Primate Specialist Group, who was not involved in the study.

"It has become apparent in the past few years that studies of anthroponotic and zoonotic disease spread are crucial to the field of primate conservation. With that in mind, it is very exciting to see the new research on this topic coming out of the Primate Conservation Group at Oxford Brookes University," said Mittermeier.

"While this study focused on one species, the mountain gorilla, the lessons learned are also applicable to many other primate species that are increasingly coming into contact with people. This line of research will certainly become more important in the future."

The study is published in the journal <a href="https://besjournals.onlinelibrary.wiley.com/journal/25758314">People and Nature</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Tourists taking selfies with mountain gorillas put them at risk of disease

Tourists may be carelessly spreading COVID-19 to wild mountain gorillas...

Potato beans have the potential to support healthier, more sustainable diets in the UK, according to a study from the <a href="https://www.abdn.ac.uk/rowett/">University of Aberdeen Rowett Institute</a>. The American plant contains about three times as much <a href="https://www.earth.com/news/proteins-identified-that-allowed-vertebrates-to-evolve/">protein</a> as a normal potato, along with fiber, calcium, zinc and potassium.

"We studied the Apios American, or potato bean, as part of our research into novel and sustainable sources of protein and fiber in a bid to find alternatives and to diversify our dietary choices," said study lead author Dr. Madalina Neacsu.

"The majority of people's protein intake in the UK currently comes from animal sources, however if we could diversify our recommended dietary intake of protein from plant-based sources, such as the potato bean, this could contribute towards meeting climate targets as well as improving health."

"The potato bean has shown previously that it can adapt to a wide geographical range and has a high tolerance to a wide range of conditions, so it is able to grow in environments away from America."

The potato bean, also known as cinnamon vine and American groundnut, is commonly found in Florida, Texas, and Colorado. The wild plant is a perennial vine that bears edible beans and large edible tubers. Previous studies have shown that rats fed potato beans exhibited a decrease in blood pressure, as well as a reduction in cholesterol and triglycerides

The researchers analyzed samples of the potato bean grown in two sites in the northern and southern regions of the UK. The analysis revealed the legume crops could become a valuable component of healthier diets. 

"Going forward, there seems to be definite potential in the implementation of new crops and foods being grown here in the UK that could help people maintain a more balanced diet," said Dr. Robin Walker.  

"Further trials are now needed to gain more insight into the best way to grow and utilize Apios on a broader scale, taking into account its perennial growth habit and the potential to use its foliage and seeds as well as the tubers."

Beyond the potential benefits to human health, high-protein plant alternatives can help reduce the greenhouse gas emissions associated with meat sources of protein.

"The potato bean is one example of the potential of wild plants to diversify our diet and build resilience in agriculture," said Dr. Max Coleman. "There are an estimated 30,000 edible plants available to us and yet widespread consumption only involves about 150 of them. Just 12 crops provide 80% of our calories, meaning we rely on less than 1% of the food plants available to us. There is considerable exciting work ahead."

Dr. Neacsu said the potential benefits of the potato bean are promising. "It is a rich source of protein and fiber, representing a good way to boost fiber consumption with can be a struggle for many people."

"We also found in Apios samples that it contained all the essential amino acids that we need to make proteins in the body. The peel and leaves are also a rich source of the bioactives which are normally found in superfruits such as berries."

The study is published in the <a href="https://www.journals.elsevier.com/journal-of-food-composition-and-analysis">Journal of Food Composition and Analysis</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Potato beans could become the next big superfood in the UK

Potato beans have the potential to support healthier, more sustainable...

<a href="https://www.earth.com/news/songbirds-rely-on-an-autism-gene-for-memorization/">Birds</a> grow thicker down feathers to survive the cold conditions in high elevations, according to a new study. The researchers examined feathers across 249 species of Himalayan songbirds using a collection of bird specimens at the <a href="http://naturalhistory.si.edu/">Smithsonian National Museum of Natural History</a>.

To regulate their body temperature, birds grow a layer of fluffy down insulation between their bodies and their outermost feathers.

The study revealed that birds living at higher elevations have more down feathers than birds living at lower elevations. The experts also found that smaller birds, which lose heat faster than large birds, grow longer down feathers in proportion to their body size.

The research highlights the importance of feathers in helping birds adapt to their environment, and suggests that adding down may be a common strategy among songbirds. The findings may ultimately help researchers predict which birds are most vulnerable to climate change by simply studying their feathers.

"The Himalayas are seeing some of the fastest rates of warming on Earth," said study lead author Sahas Barve. "At the same time, climate change is driving an increase in the frequency and intensity of extremely cold events like snowstorms. Being able to accurately predict the temperatures a bird can withstand could give us a new tool to predict how certain species might respond to climate change."

During a frigid morning of field work in the Sho-kharkh forest of the Himalayas, Barve observed a tiny goldcrest dashing across the treetops. He wondered how this little bird, which weighed about as much as a teaspoon of sugar, was able to thrive in frigid conditions. Barve set out to investigate whether Himalayan birds wear their own version of down jackets.

While previous studies suggested that birds from colder habitats had extra down feathers, Barve said this is the first study to analyze this pattern for such a large number of species in cold environments and across 15,000 feet of elevation.

The researchers used a microscope to image the chest feathers of 1,715 specimens from the high-altitude Himalayan Mountains. The team analyzed the photos to determine how long each feather's downy section was relative to its total length. 

The analysis revealed that the birds from the highest elevations, as well as the smallest birds, tended to have the highest proportion of down on their body feathers. Small birds had down feathers that were three times as long as the largest birds, while high-elevation birds had up to 25 percent more down.

"Seeing this correlation across so many species makes our findings more general and lets us say these results suggest all passerine birds may show this pattern," said Barve. "And we never would have been able to look at so many different species and get at this more general pattern of evolution without the Smithsonian's collections."

Study co-author Carla Dove said she was excited to work together with Barve to use the Smithsonian's collections in a new way. 

"Sahas looked at more than 1,700 specimens. Having them all in one place in downtown Washington, D.C., as opposed to having to go to the Himalayas and study these birds in the wild, obviously makes a big difference. It allowed him to gather the data he needed quickly before the COVID lockdowns swept the globe, and then work on the analysis remotely."

According to Dove, the potential to use these results to predict how some birds will cope with climate change demonstrates the value of museum collections. 

"We have more than 620,000 bird specimens collected over the past 200 years waiting for studies like this. We don't know what our specimens will be used for down the line; that's why we have to maintain them and keep enhancing them. These specimens from the past can be used to predict the future."

The study is published in the journal <a href="https://onlinelibrary.wiley.com/journal/16000587">Ecography</a>. 

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Birds grow more down feathers in higher elevations

Birds grow thicker down feathers to survive the cold conditions...

Around 10,000 years ago, the largest mammals in North America completely vanished. Megafauna including mammoths, ground sloths, and giant beavers were widely believed to have fallen victim to overhunting by rapidly expanding human populations, with climate change playing a significant role in the extinctions as well. 

But now, experts at the <a href="https://www.ice.mpg.de/">Max Planck Institute for Chemical Ecology</a> have found that climate change actually played a leading role in the disappearance of North American megafauna. 

Based on a new statistical modeling approach, the study shows that a drastic decrease in temperatures around 13,000 years ago likely initiated the decline of <a href="https://www.earth.com/news/vanishing-giants-study-reveals-shocking-decline-of-large-mammals-in-africa/" target="_blank" rel="noopener">giant mammal populations</a>. 

For the last six decades, the prevailing theory was that the arrival of specialized "big-game" hunters in North America about 14,000 years ago led to the rapid decline of large mammals. 

It has also been debated that there is not enough archaeological evidence that overhunting was persistent or widespread enough to cause extinctions. Instead, dramatic climate and ecological changes may have been responsible for megafauna extinctions.

Around the time of the extinction event, there were two major climate changes, beginning with a period of abrupt warming that began around 14,700 years ago. This climate warming was followed by a cold snap around 12,900 years ago during which the Northern Hemisphere returned to near-glacial conditions. 

"A common approach has been to try to determine the timing of megafauna extinctions and to see how they align with human arrival in the Americas or some climatic event," said study co-lead author Mathew Stewart. 

"However, extinction is a process - meaning that it unfolds over some span of time - and so to understand what caused the demise of North America's megafauna, it's crucial that we understand how their populations fluctuated in the lead up to extinction. Without those long-term patterns, all we can see are rough coincidences."

Traditionally, experts have used the radiocarbon record to estimate past population sizes, but there is a level of uncertainty associated with radiocarbon dates.

"As a result, you can end up seeing trends in the data that don't really exist, making this method rather unsuitable for capturing changes in past population levels," explained study co-lead author W. Christopher Carleton.

"Using simulation studies where we know what the real patterns in the data are, we have been able to show that the new method does not have the same problems. As a result, our method is able to do a much better job capturing through-time changes in population levels using the radiocarbon record."

To investigate, the researchers applied a new statistical approach that was developed by Carleton. The results show that megafauna populations fluctuated in response to climate change.

"Megafauna populations appear to have been increasing as North American began to warm around 14,700 years ago," said Stewart. "But we then see a shift in this trend around 12,900 years ago as North America began to drastically cool, and shortly after this we begin to see the extinctions of megafauna occur."

While the findings suggest that the return to near glacial conditions was the direct cause for megafauna extinctions, human activities such as overhunting and habitat modification likely played an indirect role. 

"We must consider the ecological changes associated with these climate changes at both a continental and regional scale if we want to have a proper understanding of what drove these extinctions," explained study senior author Huw Groucutt. 

"Humans also aren't completely off the hook, as it remains possible that they played a more nuanced role in the megafauna extinctions than simple overkill models suggest."

The study is published in the journal <a href="https://www.nature.com/ncomms">Nature Communications</a>.

---

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

North America's largest mammals were a casualty of climate change

Around 10,000 years ago, the largest mammals in North America...

A major shift in atmospheric <a href="https://www.earth.com/news/active-travel-can-greatly-reduce-co2-emissions-in-the-city/">CO2</a> levels may have helped dinosaurs make a 6,500-mile journey from South America to Greenland, according to a new study from the <a href="https://www.earth.columbia.edu/">Earth Institute at Columbia University</a>.

A group of long-necked, herbivorous dinosaurs known as sauropodomorphs arrived in Greenland sometime between 225 and 205 million years ago. 

The new study has matched ancient magnetism patterns in rock layers at fossil sites across South America, Arizona, New Jersey, Europe, and Greenland, to determine that the dinosaurs completed this migration around 214 million years ago. At this time, all of the continents were still connected as part of the supercontinent Pangea.

Fossil records show that sauropodomorphs first appeared in Argentina and Brazil about 230 million years ago, which raises the question of why it took them so long to expand into the Northern Hemisphere.

"In principle, the dinosaurs could have walked from almost one pole to the other," explained study co-author Dennis Kent. "There was no ocean in between. There were no big mountains. And yet it took 15 million years. It's as if snails could have done it faster."

Kent estimated that if a dinosaur herd walked only one mile per day, it would take less than 20 years to make the journey between South America and Greenland.

Up until about 215 million years ago, the Triassic period had experienced extremely high levels of CO2 at around 4,000 parts per million. Between 215 and 212 million years ago, the CO2 concentration dropped by half. This would have been the same time that sauropodomorphs set out on their long journey to Greenland.

The researchers theorize that the plummeting CO2 levels and the sauropodomorph migration are linked. They suggest that the milder levels of CO2 may have helped to remove climatic barriers that had limited the sauropodomorphs to South America.

The study authors explained that on a planet supercharged with CO2, there were likely climate extremes that would have prevented the dinosaurs from migrating. "We know that with higher CO2, the dry gets drier and the wet gets wetter," said Kent.

When the CO2 levels dipped 215 to 212 million years ago, the tropical regions may have become more mild, and the arid regions could have become less dry. Certain passageways may have developed, such as along rivers or lakes, that would have helped sustain the herbivores along the way to Greenland.

"Once they arrived in Greenland, it looked like they settled in. They hung around as a long fossil record after that." 

Kent said the idea that a dip in CO2 could have helped these dinosaurs to overcome a climatic barrier is speculative but plausible, and it seems to be supported by the fossil record.

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

Dinosaur migration was made possible by a major climate shift

A major shift in atmospheric CO2 levels may have helped...

An invasive fly from Asia that is known for attacking fruit <a href="https://www.earth.com/news/some-cereal-crops-have-a-secret-weapon-for-deeper-roots/">crops</a> is very particular about where it chooses to lay its eggs. The spotted wing drosophila fly, D. suzukii, prefers to lay its eggs in places that have not been visited by other flies, according to a new study from <a href="https://www.ncsu.edu/">North Carolina State University</a>.

The discovery raises new questions about how the flies can tell which pieces of fruit are untarnished, and about what this could mean for pest control.

Although Drosophila suzukii is native to east Asia, the fruit fly has spread rapidly across Africa, Europe, and both North and South America over the past 10 to 15 years. 

These invasive flies lay their eggs in ripe fruit, which poses problems for farmers.

"Ultimately, we're talking about hundreds of millions of dollars in potential crop losses and increases in pest-management costs each year in the United States," said study co-author Professor Hannah Burrack. "These costs have driven some small growers out of business.

"The first step toward addressing an invasive pest species is understanding it. And two fundamental questions that we had are: Which plants will this species attack? And why does it pick those plants?"

While observing Drosophila invasions on farms, the experts noticed that the flies' egg-laying behavior varied according to the size of the infestation. If they were part of a smaller population, the flies laid only a few eggs in each piece of fruit, and only when the fruit was ripe. 

On the other hand, if the flies were part of a large population, more eggs were laid in each piece of fruit. To investigate, the researchers conducted a series of experiments. 

The surprising results revealed that, when given a choice, D. suzukii preferred to lay its eggs in fruit that other flies had never visited.

"It doesn't matter if the other flies lay eggs," said Professor Burrack. "It doesn't even matter if the other flies are male or female. It only matters if other flies have touched a piece of fruit. If untouched fruit is available, D. suzukii will reject fruit that other flies have visited."

"We're not sure if the flies leave behind a chemical or bacterial marker, or something else entirely - but the flies can tell where other flies have been."

The researchers said that the next step is to determine what, exactly, the Drosophila suzukii flies are detecting as they scope out the fruit.

"If we can get a better understanding of what drives the behavior of this species, that could inform the development of new pest-control techniques," said Professor Burrack. "We're not making any promises, but this is a significant crop pest - and the more we know, the better."

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

Drosophila flies prefer to lay their eggs in untouched fruit

An invasive fly from Asia that is known for attacking...

Researchers at the <a href="https://www.umass.edu/">University of Massachusetts Amherst</a> have used remote sensing to investigate farmland erosion in the Corn Belt region of the Midwestern United States. The study revealed that out of nearly 100 million acres of land that make up the Corn Belt, more than one third has completely lost its carbon-rich <a href="https://www.earth.com/news/lost-topsoil-farmers-switchgrass/">topsoil</a>. 

The findings indicate that the extent of farmland erosion in the Midwest haa been substantially underestimated by the U.S. Department of Agriculture.

The A-horizon is the upper portion of the soil that is rich in organic matter, which is critical for plant growth because of its water and nutrient retention properties. 

Led by graduate student Evan Thaler, the UMass Amherst team analyzed satellite imagery to map areas in agricultural fields in the Corn Belt that have no remaining A-horizon soil. 

By combining the satellite measurements across the Corn Belt with high-resolution elevation data, the experts could reveal the true magnitude of erosion.

Productive agricultural soils are critically needed to produce food for a growing global population. However, farmland erosion diminishes soil quality and reduces crop yields. 

Thaler and his colleagues estimate that erosion of the A-horizon has reduced corn and soybean yields by about 6 percent. This equates tip nearly $3 billion in annual economic losses for farmers across the Midwest.

The analysis showed that A-horizon has been lost primarily on hilltops and ridgelines. This indicates that tillage erosion, or the downslope movement of soil by repeated plowing, is a major driver of soil loss in the Midwest. 

According to the researchers, the study highlights an urgent need to include tillage erosion in the soil erosion models that are used in the Unites States, as well as the need to incentivize adoption of no-till farming methods.

The research also suggests that erosion has removed nearly 1.5 petagrams of carbon from hillslopes. The experts said that switching from intensive conventional agricultural practices to soil-regenerative practices has potential to sequester carbon dioxide from the atmosphere while restoring soil productivity.

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

More than one-third of the Corn Belt impacted by farmland erosion

Researchers at the University of Massachusetts Amherst have used remote...

Ross Ice Shelf

Scientists have discovered some strange and unexpected <a href="https://www.earth.com/news/sponges-dna-sea-creatures/">creatures</a> living far beneath the Antarctic ice shelf, according to a new study published by <a href="https://www.frontiersin.org/">Frontiers</a>. 

This is the first time a hard substrate community has been found deep beneath an ice shelf, and the discovery contradicts previous theories of what types of life could survive there.

During an expedition to the Filchner-Ronne Ice Shelf, which is located in the southeastern Weddell Sea, researchers drilled through 900 meters of ice. At a distance of 260 kilometers from the ice front, the site was under complete darkness with temperatures of -2.2 degree Celsius. 

While very few animals have ever been observed in such conditions, scientists found that a large boulder on the seafloor was covered with sponge-like stationary animals. 

"This discovery is one of those fortunate accidents that pushes ideas in a different direction and shows us that Antarctic marine life is incredibly special and amazingly adapted to a frozen world," said study lead author Dr. Huw Griffiths of the British Antarctic Survey.

"Our discovery raises so many more questions than it answers, such as how did they get there? What are they eating? How long have they been there? How common are these boulders covered in life? Are these the same species as we see outside the ice shelf or are they new species? And what would happen to these communities if the ice shelf collapsed?"

Floating ice shelves cover more that 1.5 million square kilometers of the Antarctic continental ice shelf, yet only a total area similar in size to a tennis court has been explored. 

"Prior to this study, our knowledge of these habitats and the life they support was restricted to what has been observed from eight boreholes drilled for geological and glaciological studies," wrote the researchers.

It has been widely assumed that whatever life forms could survive beneath ice shelves become less abundant as you move farther away from open water and sunlight. In the past, some small mobile scavengers and predators like fish and worms have been spotted in these habitats. 

The researchers said that the local currents suggest this community is somewhere between 625 and 1500 kilometers in the direction of water flow from the nearest region of photosynthesis. 

There are some organisms that depend on nutrients from glacial melts or chemicals from methane seeps to survive in such extremities, but little is known about the new creatures until the researchers have an opportunity to study them further.

"To answer our questions we will have to find a way of getting up close with these animals and their environment - and that's under 900 meters of ice, 260km away from the ships where our labs are," said Dr. Griffiths. "This means that as polar scientists, we are going to have to find new and innovative ways to study them and answer all the new questions we have."

The experts noted that with the climate crisis and the collapse of these ice shelves, time is running out to study and protect these ecosystems.

"This new evidence requires us to rethink our ideas with regard to the diversity of community types found under ice shelves, the key factors which control their distribution and their vulnerability to environmental change and ice shelf collapse."

The study is published in the journal <a href="https://www.frontiersin.org/journals/marine-science">Frontiers in Marine Science</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

Strange creatures found beneath the Antarctic ice shelf

Scientists have discovered some strange and unexpected creatures living far...

A new study led by the <a href="https://www.bristol.ac.uk/">University of Bristol</a> has revealed that tropical paper wasps help out neighboring <a href="https://www.earth.com/news/bumblebees-change-their-lifestyle-after-establishing-a-nest/">nests</a> by babysitting when there are extra workers available. The findings suggest that when their closest kin are less in need, the wasps seek to help more distant relatives.

"These wasps can act like rich family members lending a hand to their second cousins. If there's not much more you can do to help your immediate family, you can turn your attention to the extended family," explained study lead author Dr. Patrick Kennedy.

Around the Panama Canal, the researchers observed 20,000 baby wasps and their caregivers to investigate the usefulness of workers in colonies of different sizes. The study showed that as the number of colony members rises, the worker bees become less useful due to a surplus of help.

"By helping more distant relatives who are more in need - those living next door with fewer carers - workers can pass on more copies of their genes overall," said study co-author Professor Andy Radford. "We believe that similar principles of diminishing returns might explain seemingly paradoxical acts of altruism in many other social animals."

Dr. Kennedy said the fact that these paper wasps help at other colonies is really bizarre when you consider that most wasps, ants, and bees are extremely hostile to outsiders. 'To solve this puzzling behavior, we combined mathematical modelling with our detailed field observations."

"We ended up being stung a lot. But it was worth it, because our results show that worker wasps can become redundant at home. A wasp on a colony with few larvae but lots of other workers becomes almost useless: the best thing to do is to babysit the larvae of other relatives."

The evolution of "altruism" in animals had remained a mystery for many decades since the time of Charles Darwin.

"In 1964, the legendary biologist W. D. Hamilton figured out the cardinal rule of animal altruism. Lavish help on your family because they share many of your genes. Copies of your genes will triumph in the population," said Professor Radford.

However, the behavior of tropical paper wasps baffled Hamilton back in 1964. He was surprised to notice that Polistes wasps were leaving their close family in their home nests and flying off to help the neighbors, who are less closely related.

Previously, study co-author Professor Seirian Sumner reported that over half the workers in a Panamanian population of paper wasps were helping on multiple nests. This comes as a surprise considering that wasps usually viciously attack outsiders, and suggests that something unusual is going on.

"Wasps offer amazing windows into the evolution of selflessness," said Professor Sumner. "There is so much going on in a wasp nest: power struggles, self-sacrifice, groups battling against the odds to survive... If we want to understand how societies evolve, we should look more deeply at wasps."

The study is published in the journal <a href="https://www.nature.com/natecolevol/">Nature Ecology and Evolution</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

Paper wasps offer clues about the evolution of selflessness

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

Experts at <a href="https://www.harvard.edu/">Harvard University</a> have proposed a theory that could explain the origin of the comet or asteroid that crashed into Earth about 66 million years ago, ultimately killing the dinosaurs.

Buried underneath the Yucatán Peninsula in Mexico, the Chicxulub crater is 93 miles wilde and 12 miles deep. The impact wiped out nearly three-quarters of the plant and animal species living on Earth.

The new Harvard study by Professor Avi Loeb and PhD student Amir Siraj may finally reveal the identity of the space object and how it ended up on a collision course with Earth. 

The researchers analyzed long-period comets from the Oort cloud, an icy sphere of debris at the edge of the solar system. They determined that a significant portion of these comets can be bumped off course by Jupiter's gravitational field.

"The solar system acts as a kind of pinball machine," said Siraj. "Jupiter, the most massive planet, kicks incoming long-period comets into orbits that bring them very close to the sun."

These so-called "sungrazers" can get broken apart into pieces of the rock and produce cometary shrapnel.

"In a sungrazing event, the portion of the comet closer to the sun feels a stronger gravitational pull than the part that is further, resulting in a tidal force across the object," explained Siraj. 

"You can get what's called a tidal disruption event, in which a large comet breaks up into many smaller pieces. And crucially, on the journey back to the Oort cloud, there's an enhanced probability that one of these fragments hit the Earth."

The findings increase the chances of long-period comets impacting Earth by a factor of 10, and show that about 20 percent of long-period comets become sungrazers. According to the researchers, their new rate of impact is consistent with the age of Chicxulub, providing a satisfactory explanation for its origin and other impactors like it.

"Our paper provides a basis for explaining the occurrence of this event," said Professor Loeb. "We are suggesting that, in fact, if you break up an object as it comes close to the sun, it could give rise to the appropriate event rate and also the kind of impact that killed the dinosaurs."

The new theory may also explain why the Chicxulub crater had rock that was composed of carbonaceous chondrite. It is widely believed that the Chicxulub impactor originated from the main belt, which is an asteroid population between the orbit of Jupiter and Mars. 

However, carbonaceous chondrites are rare among main-belt asteroids, but may be widespread among long-period comets, which provides additional support for the new calculations.

The new Vera Rubin Observatory in Chile may be able to observe tidal disruption of long-period comets after it becomes operational next year.

"We should see smaller fragments coming to Earth more frequently from the Oort cloud," said Professor Loeb. "I hope that we can test the theory by having more data on long-period comets, get better statistics, and perhaps see evidence for some fragments."

Professor Loeb said that understanding this is not just crucial to solving a mystery of Earth's history, but could prove pivotal if such an event were to threaten the planet. "It must have been an amazing sight, but we don't want to see that again."

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

Sungrazing comet may have caused dinosaur extinction event

Experts at Harvard University have proposed a theory that could...

In a new study from the <a href="https://www.vims.edu/">Virginia Institute of Marine Science</a>, experts have found that it is important to measure biodiversity across regional landscapes over decades, rather than just across a small site in the short-term. The research will ultimately guide conservation planning and support efforts to make ecosystems more resilient.

Biodiversity is traditionally examined using short-term plot experiments in which ecologists monitor the health of a single meadow, forest grove, or pond. The new study emphasizes the importance of conducting biodiversity studies that provide insight on a larger scale. 

"Having low biodiversity is like putting all your eggs in one basket and puts us at greater risk of something catastrophic happening," said study lead author Dr. Christopher Patrick. "We've known this for a long time, but never before have we shown this to be true for entire regions and landscapes."

The team compiled, analyzed, and modeled data collected over decades across both aquatic and terrestrial ecosystems. The investigation was focused on the abundance and diversity of 50 families of terrestrial beetles in the Sonoran Desert, 25 species of submerged aquatic vegetation (SAV) in the Chesapeake Bay, and 56 species of fish from small streams in Maryland.

A recent drop in SAV coverage within the Chesapeake Bay, as recorded by VIMS' long-term monitoring program, demonstrates the threats posed by low biodiversity.

"For the past few years, our gains in seagrass coverage were mostly due to the expansion of one species, widgeon grass," said Dr. Patrick. "That made us vulnerable. When widgeon grass had a bad year in 2019, we saw the single biggest drop in Chesapeake Bay SAV in the history of the VIMS monitoring program. The lesson here is that promoting biodiversity will increase ecosystem resilience." 

Climate change is increasing the risk for local extinctions, promoting outbreaks of pests and diseases, and diminishing yields from human fisheries and agriculture. This means that conservation efforts are even more urgently needed. 

"Understanding the interplay between regional and local controls of ecosystem variability may aid in the design of more effective conservation actions, management practices, and monitoring networks worldwide," said Dr. Patrick.

"Our results, bolster the argument for conserving biodiversity by showing that it is needed at both local and regional scales to maintain stable delivery of ecosystem services across entire landscapes."

"We should not only avoid putting all our eggs in one basket, but ensure that we have lots of different kinds of eggs in lots of different kinds of baskets."

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>.

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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

Promoting biodiversity increases ecosystem resilience

In a new study from the Virginia Institute of Marine...

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



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Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

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



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



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



Video/ Image Credit: ESA



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

Nushagak Bay in southwest Alaska

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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



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



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

Flu viruses are more flexible than expected

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



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



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



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



Video/Image Credit: ESA&nbsp;



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

Lake Trasimeno in Central Italy

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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

Detecting mercury contamination with the tap of a finger

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



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



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



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



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



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



Video/ Image Credit: European Space Agency&nbsp;



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



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

Kainji Lake in north central Nigeria

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



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



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



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



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



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



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



Video Credit: Amanda Nguyen/University of Illinois



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



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

Designing crops that can beat the heat

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



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



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



Video Credit: ACS Reactions



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



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

How does salt makes things taste better?

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



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



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



Video/ Image Credit: ESA



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



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

Santiago, Chile in South America

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

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



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



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



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



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



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



Video Credit: Johns Hopkins&nbsp;



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



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

Interactive map of the universe includes 200,000 galaxies

[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"] Astronomers at Johns Hopkins University have created...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



Video Credit: NASA Goddard&nbsp;



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



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Remote sensing will revolutionize the way we monitor trees

[sendtonews key="EjmSP20gQK-2593093-12187" type="single"] Today's Video of the Day from NASA...

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



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



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



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



Video Credit: ESA&nbsp;



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



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

The city of Dublin on Ireland's east coast

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



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



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



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



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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



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



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



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



Video Credit: NASA Goddard



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



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

Wetlands are a major source of methane emissions

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



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



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



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



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



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



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



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



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



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



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

The rapid retreat of the Columbia Glacier

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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



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



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



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



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



Video Credit: Stowers Institute for Medical Research&nbsp;



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



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

How the immune system responds to injury

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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

2022 illustrated the consequences of a warming climate

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Earth,Like,Exoplanet,3d,Render

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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