Invasive species pose a significant challenge to ecosystems and agriculture, often spreading unnoticed until they have caused considerable damage. Conservationists and growers now have an unusual new ally in the fight against the invasive spotted lanternfly - trained dogs.



A recent study published in the journal Ecosphere highlights how these detection dogs outperform humans in identifying lanternfly egg masses in challenging environments, offering a novel strategy to curb the pest’s spread.



"Preventing the introduction of invasive species is championed as the most cost-effective and efficient strategy for avoiding negative impacts on systems," noted the researchers.



"However, once a species has been introduced, the next best option is to detect the population and eliminate it before it becomes established and spreads more widely across the landscape."



<h2 class="wp-block-heading" id="h-spotted-lanternfly-infestations">Spotted lanternfly infestations </h2>



First detected in Pennsylvania in 2014, the spotted lanternfly has now infested 19 states, including New York. This invasive insect feeds on woody plants like grapes, apples, hops, and various trees, causing <a href="https://www.earth.com/news/growing-threat-of-invasive-species-requires-immediate-action/" target="_blank" rel="noreferrer noopener">widespread destruction</a>.



“A spotted lanternfly infestation in a vineyard can cause 80% to 100% mortality of the vines in one growing season,” said study co-author Angela Fuller, a professor in Cornell’s Department of <a href="https://cals.cornell.edu/natural-resources-environment" target="_blank" rel="noreferrer noopener">Natural Resources and the Environment</a>.



Fuller also noted the financial burden of infestations. “Infestations also increase the amount of insecticide that growers need to use, which can increase costs by up to 170% in a growing season.” 



<h2 class="wp-block-heading" id="h-training-dogs-for-invasive-species-detection">Training dogs for invasive species detection</h2>



In collaboration with the <a href="https://www.nynjtc.org" target="_blank" rel="noreferrer noopener">New York-New Jersey Trail Conference</a> and <a href="https://wd4c.org" target="_blank" rel="noreferrer noopener">Working Dogs for Conservation</a>, researchers trained a Labrador retriever and a Belgian malinois to sniff out the lanternfly’s egg masses.



These organizations have previously trained dogs to detect invasive <a href="https://www.earth.com/news/cats-have-become-one-of-the-worlds-most-invasive-predators/" target="_blank" rel="noreferrer noopener">species</a> and pathogens, making them well-equipped for this task.



The study compared the efficiency of human and canine detection in 20 vineyards across Pennsylvania and New Jersey. 



The researchers mapped transects in vineyard rows and adjacent forests, where egg masses are likely to overwinter. Humans and dogs surveyed the areas on separate days to prevent cross-contamination of scents.



<h2 class="wp-block-heading" id="h-dogs-outperform-humans-in-forests">Dogs outperform humans in forests</h2>



While humans excelled in detecting invasive egg masses in vineyards, dogs proved superior in forested areas. In vineyards, humans detected 1.8 times more egg masses than dogs, finding 31 egg masses per hour compared to the dogs’ 24. 



Fuller attributed this to humans’ ability to systematically search vines and poles, whereas dogs relied on scent and conducted more random searches. In forests, however, dogs excelled, finding 3.4 times more egg masses than humans. 



“The dogs find egg masses by smell,” Fuller explained. “In a very <a href="https://www.earth.com/news/unseen-crisis-37000-alien-species-have-been-introduced-by-human-activities/" target="_blank" rel="noreferrer noopener">complex environment</a>, it’s easier for a dog to smell something than it is for a human to see something that is small and cryptic.” 



Dogs located 7.6 egg masses per hour in forests compared to humans’ 6.7 per hour.



<h2 class="wp-block-heading" id="h-importance-of-invasive-species-detection">Importance of invasive species detection</h2>



The study emphasizes the importance of early detection in managing the lanternfly’s spread. Dogs performed exceptionally well in areas with low egg mass densities, making them invaluable for rapid response efforts. 



Fuller noted that while dogs take more time to search than humans, the added time is worth it. 



“The extra time that dogs take to find them is not as important as it is to find them in the first place, because you need to detect the egg masses in order to eradicate them,” she said.



<h2 class="wp-block-heading" id="h-insights-into-lanternfly-behavior">Insights into lanternfly behavior</h2>



Using computer modeling, the researchers identified patterns in lanternfly egg mass distribution. They found higher occupancy rates in vineyards than forests, particularly on metal poles. 



Vineyards near forests had higher lanternfly populations, likely because the insects don’t disperse far and often migrate from nearby trees.



“If you’re searching in a vineyard close to the forest, that’s more likely where they’re going to be,” Fuller said.



<h2 class="wp-block-heading" id="h-combating-invasive-species-with-dogs">Combating invasive species with dogs </h2>



This innovative approach offers hope for combating invasive species like the spotted lanternfly. 



By combining human surveys with trained detection dogs, growers and conservationists can strengthen their defense against this destructive pest.



The integration of canine detection into pest management strategies represents a significant step forward in protecting vital ecosystems and <a href="https://www.earth.com/news/non-native-species-are-spreading-at-an-exponential-rate/" target="_blank" rel="noreferrer noopener">agricultural resources</a>.



The study is published in the journal <a href="https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecs2.70113" target="_blank" rel="noreferrer noopener">Ecosphere</a>.



-----



Like what you read? <a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;



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



-----

Trained dogs can sniff out invasive pests in forests

Invasive species pose a significant challenge to ecosystems and agriculture, often spreading unnoticed until they have caused considerable damage. Conservationists and growers now have an unusual new ally in the fight against the invasive spotted lanternfly - trained dogs. A recent study published in the journal Ecosphere highlights how these detection dogs outperform humans in identifying lanternfly egg masses in challenging environments, offering a novel strategy to curb the pest’s spread. "Preventing the introduction of invasive species is championed as the most cost-effective and efficient strategy for avoiding...

We all know that plastic waste is a widespread problem, especially in our water systems. Plastic pollution directly threatens aquatic habitats and the plants and animals that live there.&nbsp;



A study led by the <a href="https://www.cam.ac.uk/">University of Cambridge</a> has given us another perspective. After studying 29 European lakes, scientists found that naturally occurring <a href="https://www.earth.com/news/dogs-fed-raw-meat-may-spread-antibiotic-resistant-bacteria/">bacteria</a> in these water bodies grew more quickly and efficiently on a plastic diet than their natural diet, which includes leaves and branches.



"It's almost like the plastic pollution is getting the bacteria's appetite going. The bacteria use the plastic as food first, because it's easy to break down, and then they're more able to break down some of the more difficult food – the natural organic matter in the lake," explained study senior author Dr. Andrew Tanentzap.



"This suggests that plastic pollution is stimulating the whole food web in lakes, because more bacteria means more food for the bigger organisms like ducks and fish."



However, it is essential to note that this process does not affect every lake the same way. The microbial diversity&nbsp; in the lake plays a role, with more bacterial diversity leading to more plastic consumption.&nbsp;



Furthermore, bacteria removed more plastic waste in lakes with fewer natural sources of carbon because there were fewer available food sources. With this knowledge, researchers can prioritize lake remediation using this method. For example, lakes with high plastic pollution but low bacterial diversity and low levels of natural organic compounds will be more susceptible to damage.



"Unfortunately, plastics will pollute our environment for decades. On the positive side, our study helps to identify microbes that could be harnessed to help break down plastic waste and better manage environmental pollution," said Professor David Aldridge.



The researchers emphasize that the research does not imply that plastic is not a problem for our waterways - only that the impact of plastic waste can be unpredictable.&nbsp;



"Our study shows that when carrier bags enter lakes and rivers they can have dramatic and unexpected impacts on the entire ecosystem," said study first author Eleanor Sheridan. "Hopefully our results will encourage people to be even more careful about how they dispose of plastic waste."



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



---



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

Bacteria can remove plastic waste from lakes

We all know that plastic waste is a widespread problem,...

A team of scientists from <a href="https://plus.cnu.ac.kr/html/en/">Chungnam National University</a> (CNU) in South Korea have recently created two beagle dogs from cloned skin cells altered by <a href="https://www.earth.com/news/grapevine-killer-controlled-through-gene-editing-strategy/">gene-editing</a> technologies. The researchers hope that this technique could be used more broadly in the near future to eliminate disease-causing mutations from pedigree dog breeds.



Because of years of inbreeding, pedigree dogs are frequently susceptible to genetic diseases. For instance, some cocker spaniels are known to have brains too large for their skulls, while boxers are often suffering from epilepsy. By using a gene-editing tool called CRISPR-Cas9, the CNU scientists created the beagles by first editing skin cells to mutate a gene (DJ-1) that is associated with degenerative diseases such as Parkinson’s. They then placed these gene-edited skin cells next to egg cells whose DNA had been removed, and fused them together by using short pulses of electricity. Through this technique, a total of 68 embryos were created and implanted into six surrogate mothers, resulting in two puppies.



The two cloned beagles are now 22 months old and do not show signs of any abnormalities. “DJ-1 KO dogs show partial or complete repression of target gene expression,” the study authors reported.&nbsp;“This technology can be used in further studies to produce pathogenic gene-corrected or disease-modelling dogs.” However, since the diseases linked to the DJ-1 gene are age-related, it is still too early to tell whether the dogs will experience any degenerative diseases as they get older.&nbsp;



Although the first human trials of CRISPR therapies have already been initiated, and scientists hope they are on the brink of reaching the clinics, many researchers remain skeptical about these developments. According to some scholars, gene-editing tools could potentially cause unwanted mutations that may prove dangerous. Others worry that this groundbreaking technology could lead to the creation of “designer babies,” by allowing parents to choose their children’s hair color, height, or even traits such as intelligence. However, regardless of these critical stances, most scientists remain hopeful that these methods could ease the burden of disease in many animals, including humans.



The study is published in the journal <a href="https://bmcbiotechnol.biomedcentral.com/articles/10.1186/s12896-022-00749-3#Sec3">BMC Biotechnology</a>.&nbsp;&nbsp;



---



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

Cloned beagles created for the first time

A team of scientists from Chungnam National University (CNU) in...

Whale sharks are filter feeders that have long been observed eating krill at the Ningaloo Reef in Western Australia. However, when a team of researchers led by the <a href="https://www.aims.gov.au/">Australian Institute of Marine Science</a> (AIMS) analyzed biopsy samples from these sharks, they were surprised to discover that the animals were in fact eating a significant amount of <a href="https://www.earth.com/news/plants-shed-their-flowers-quickly-for-protection-from-microbes/">plant</a> material too. This makes whale sharks – which can be up to 18 meters long – the world’s largest omnivores.



“This causes us to rethink everything we thought we knew about what whale sharks eat,” said study lead author Mark Meekan, a fish biologist at AIMS. “On land, all the biggest animals have always been herbivores. In the sea we always thought the animals that have gotten really big, like whales and whale sharks, were feeding one step up the food chain on shrimp-like animals and small fishes. Turns out that maybe the system of evolution on land and in the water isn’t that different after all.”



In order to find out what the sharks eat, Dr. Meekan and his colleagues collected a variety of samples of possible food sources at the reef, from small plankton to large seaweed. Then they compared the amino acids and fatty acids in the plankton and plant material to those sampled from sharks, and found that the whale shark tissue contained compounds found in Sargassum, a species of brown seaweed common at Ningaloo, which breaks off the reef and floats to the surface of the water.



“We think that over evolutionary time, whale sharks have evolved the ability to digest some of this Sargassum that’s going into their guts,” Dr. Meekan said. “So, the vision we have of whale sharks coming to Ningaloo just to feast on these little krill is only half the story. They’re actually out there eating a fair amount of algae too.”



According to study senior author Andy Revill, a biogeochemist at the <a href="https://www.csiro.au/en/about/people/business-units/oceans-and-atmosphere">Commonwealth Scientific and Industrial Research Organization, Oceans and Atmosphere</a>, studying shark tissue using compound-specific stable isotope analysis allows scientists to clarify what animals are using for energy and growth, instead of just what they are eating.



“Something like a whale shark, which swims through the water with its mouth open, is going to ingest a lot of different things,” he explained. “But you don’t know how much of that has been used by the animal and how much just goes straight out the other end. Whereas stable isotopes, because they’re actually incorporated into the body, are a much better reflection of what the animals are actually utilizing to grow.”



In the case of whale sharks, such analysis revealed that plant material is essential for providing them energy and helping them grow - perhaps even more so than krill. Further research is needed to better understand the evolution and behavior of these fascinating creatures.



The study is published in the journal <a href="https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecy.3818">Ecology</a>.



---



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

Whale sharks are the world’s largest omnivores

Whale sharks are filter feeders that have long been observed...

In a new study led by the <a href="https://www.nottingham.ac.uk/">University of Nottingham</a>, experts are exploring the potential for <a href="https://www.earth.com/news/plants-shed-their-flowers-quickly-for-protection-from-microbes/">plants</a> to reach new depths by modifying the angle of their roots. The researchers have discovered a gene in barley and wheat that controls the angle of root growth.



According to the international team of experts, a steeper root angle helps bury carbon deeper in soil. This means the research could ultimately lead to the development of new methods for carbon capture and storage. Furthermore, deeper roots have better access to nutrients, which could make crops more resilient to drought and stress.&nbsp;



The researchers found that a gene called Enhanced Gravitropism 1 (EGT1) controls root angle by stiffening the core of growing root tips - making it more difficult to bend downwards. The team used X-ray micro CT imaging to show that by disrupting this gene, plants can grow roots with a steeper angle.



"The angle at which barley roots grow down into the soil enables them to capture water and nutrients from different soil layers,” said study co-first author Dr. Haoyu Lou from the University of Adelaide.



“Shallow roots enable plants to capture phosphate and surface water, while deeper, straighter roots can stabilise yield by accessing deeper water and nitrate; they can also bury carbon deeper in the soil.”



“By identifying the genes that control root growth angle we can greatly aid efforts to develop crops that are better adapted to specific soil types and more resilient to fluctuating environmental conditions, helping to mitigate carbon burden and counter the effects of climate change."



“We have found that mutants lacking function of the EGT1 gene exhibit a steeper growth angle in all classes of roots. Remarkably, the roots behave as if they are overly sensitive to gravity – they are unable to grow outwards from the plant, and instead grow straight down.”



The research was co-led by Rahul Bhosale, an assistant professor in the School of Biosciences and the Future Food Beacon at the University of Nottingham.



“Root angle controls how efficiently plants can capture water and nutrients. For instance, shallow roots best capture phosphate which accumulates in the top-soil region, while steeper roots are better for foraging for water and nitrate in deeper soil layers," said Bhosale.



"Steeper roots are also important for helping bury carbon deeper into soil. Discovering genes like EGT1 and how they control root angle is critical for developing novel future crop varieties better able to capture nutrients and carbon.”&nbsp;



The study is published in the scientific 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

Deeper plant roots could boost soil carbon storage

In a new study led by the University of Nottingham,...

An international team of researchers led by the <a href="https://www.linkedin.com/company/icmcsic">Institut de Ciències del Mar</a> (ICM-CSIC) has found evidence that <a href="https://www.earth.com/news/human-activities-are-fueling-more-extreme-heatwaves/">heatwaves</a> in the Mediterranean Sea between 2015 and 2019 were the cause of recurring mass mortality events. The experts warn that these extreme conditions could become the norm, impacting all regions of the Mediterranean Basin.



The researchers discovered that populations of dozens of species - including sponges and corals - were affected by hotter water temperatures along thousands of kilometers of Mediterranean coastline.&nbsp;



"Specifically, the impacts of mortalities were observed between the surface and 45 meters’ depth, where the recorded marine heat waves were exceptional, affecting more than 90% of the Mediterranean surface and reaching temperatures of more than 26ºC," explained study co-author Joaquim Garrabou.



The experts found that some of the populations that were most affected by the heatwaves were keystone species, which are organisms that are central to the functioning of their ecosystems. The Mediterranean heatwaves were particularly damaging to Posidonia oceanica meadows and coral reefs.



According to the experts, this is the first study to assess the effects of mass mortalities on a Mediterranean scale over five consecutive years. The massive project involved more than 30 research groups from 11 countries. This made it possible to examine the impacts of extreme warming on marine organisms throughout the entire basin.&nbsp;



"Unfortunately, the results of the work show that the Mediterranean Sea is experiencing an acceleration of ecological impacts associated with climate change, posing an unprecedented threat to the health and functioning of its ecosystems," said study co-authors Cristina Linares and Bernat Hereu.



According to Professor Alfonso Ramos, mass mortality events in the Mediterranean are equivalent to the bleaching events also observed consecutively in the Great Barrier Reef, suggesting that these episodes are already the norm rather than the exception.



In order to reach more effective management decisions during the ongoing climate crisis, the researchers are urging for stronger coordination and cooperation at regional, national and international levels.



The study is published in the journal <a href="https://onlinelibrary.wiley.com/journal/13652486">Global Change Biology</a>.



---



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

Heat is driving mortality events in the Mediterranean

An international team of researchers led by the Institut de...

<a href="https://www.earth.com/news/greater-temperature-changes-linked-to-worse-extinction-events/">Temperature</a> affects almost every part of an organism’s daily experience. Biologists have already studied at length how animals can survive in the climates in which they live, and the strategies they employ to keep themselves from overheating or freezing to death. However, not much research has been done on how temperature affects animals beyond mere survival. A research team led by the <a href="https://wustl.edu/">Washington University in St. Louis</a> has now explored the myriad ways in which thermal biology co-adapts with traits favored by sexual selection, including courtship displays, ornamental coloring, or enlarged weapons such as claws or horns.



“Now that we’ve studied a huge number of traits that animals have evolved in order to survive the temperatures they face, we’re starting to realize that these traits also have consequences for where and how animals reproduce,” said study lead author Michael Moore, a postdoctoral fellow in Evolutionary Ecology at the University of Washington. “But as we thought about the ways in which an animal’s thermal traits influence how it tries to attract mates, we also couldn’t shake the feeling that this was a very survival-centric view of the adaptation.”



“It supposes that the ways that animals reproduce in their climate is entirely beholden to how they’ve evolved in order to survive in that climate. However, we know from decades of behavioral ecology research that animals will often put themselves at risk of getting eaten or parasitized if it means they could potentially attract a mate. We were curious then why the threat of overheating should be any different.”



The study revealed that, in fact, animals would often put their lives in danger in order to reproduce, and managed to evolve mechanisms which allow them to tolerate the dangerous temperatures they often encounter during mating. In some animal populations, increased heat tolerance has evolved to accommodate the heat absorbed or retained by traits used for mating, giving them adaptive advantages to warming temperatures – which may turn out to have major benefits in a warming world such as ours.



“In some cases, sexual traits are even directly beneficial for dissipating heat, like antelope horns and fiddler crab claws,” explained study co-author Noah Leith, a doctoral student in thermal ecology and sexual selection at <a href="https://www.slu.edu/">Saint Louis University</a>. “Sexual selection on horns or claws may therefore work in concert with natural selection and accelerate adaptation to warmer temperatures. Beyond increasing reproductive success in altered climates, there are a variety of unexplored ways that sexual selection can directly enhance an organism’s non-mating performance during climate change.”



Further research is needed to clarify the consequences of global warming for sexual interaction and other reproductive processes. “What’s really novel about our work is that we show that reproduction can sometimes actually be the leading reason for many of the adaptations that animals have for dealing with their local climate,” Dr. Moore concluded.



The study is published in the journal <a href="https://doi.org/10.1111/ele.14072">Ecology Letters</a>.&nbsp;



---



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

Temperature tolerance has co-evolved with sexual selection

Temperature affects almost every part of an organism’s daily experience....

Black carbon - or soot – emitted by vehicles, power plants, residential heating, and <a href="https://www.earth.com/news/cats-exposed-to-wildfires-are-at-risk-of-deadly-blood-clots/">wildfires</a> is a highly potent absorber of solar radiation that converts incoming light to atmospheric heating. However, since soot is usually mixed with other substances, it has been difficult to estimate its effect on the climate.&nbsp;



A new study led by the <a href="https://www.lanl.gov/">Los Alamos National Laboratory</a> has investigated how soot’s light-reflecting and light-absorbing properties evolve as it ages during the dispersal of wildfire smoke, in order to predict more accurately this substance’s contribution to global warming.



“Black carbon or soot is the next most potent climate-warming agent after CO2 and methane, despite a short lifetime of weeks, but its impact in climate models is still highly uncertain. Our research will clear up that uncertainty,” said study lead author James Lee, a climate researcher at the Los Alamos National Lab.&nbsp;



The scientists sampled smoke from several wildfires over two summers in the Western United States, including the Medio Fire in New Mexico in 2020 and aged plumes from fires in California and Arizona. Months after these wildfires were extinguished, the smoke plumes can linger in the upper atmosphere, and form organic aerosols that condense around black carbon particles. Some of these aerosols focus light on the soot, increasing its absorption. However, the quantity of absorbed light depends on the size of the aerosols and how they coat the soot.



“Wildfires emit soot and organic particles that respectively absorb and scatter the sunlight to warm or cool the atmosphere to a varying net effect, depending on the composition of the smoke mixture,” said study senior author Manvendra Dubey, an expert in climate, energy, and air quality research at the Los Alamos Lab. “This mixing evolves over time as smoke from large megafires disperses globally. We discovered a systematic relationship between the increase in light absorption efficiency of soot with age due to the growth in organic coatings.”



By analyzing 60 million smoke particles, the researchers managed to account for variations in the amount of organic coating on each particle, and used existing absorption models to determine how much light energy each particle absorbed in order to infer the total black carbon absorption of the plumes. They found that current climate models generally overestimate how much radiation is absorbed by black carbon, leading to large uncertainties and biases in wildfire climate effects.



“When smoke plumes remain in the lower troposphere and don’t experience temperatures below freezing, black carbon absorption can be predicted by an empirical relationship related to the ratio of coating material to black carbon volume in the plume. This simple parameterization is suitable for incorporation into complex earth systems models to determine the climate impact of black carbon,” the authors concluded.



The study is published in the journal <a href="about:blank">Geophysical Research Letters</a>.



---



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

Exploring the climate-warming effects of wildfire soot

Black carbon - or soot – emitted by vehicles, power...

The first&nbsp;fossilized skeleton of a Tyrannosaurus rex&nbsp;was discovered in 1902, in Montana’s Hell Creek Formation. Subsequently, similar finds were few and far between, with only another three specimens being excavated by 1980. However, since then, more than two dozen additional specimens have been uncovered. As the sample has grown, scientists have identified some variation between specimens that has become the subject of discussion and further investigation.&nbsp;



Some scientists have asserted that the variations in tooth and femur measurements of 38 Tyrannosaurus specimens are distinct enough to represent three separate species. These experts proposed naming the two new species T. regina and T. imperator. However, in a rebuttal of this provocative hypothesis, paleontologists from the <a href="https://www.amnh.org/">American Museum of Natural History</a> and Carthage College reanalyze the fossil specimens and find that the variations fall well within what can be expected from different individuals in a single species, that of T. rex.&nbsp;



“Recently, a bold theory was announced, to much fanfare: what we call&nbsp;T. rex&nbsp;was actually multiple species,” explained Steve Brusatte, co-author of the paper refuting these claims. “It is true that the fossils we have are somewhat variable in size and shape, but as we show in our new study, that variation is minor and cannot be used to neatly separate the fossils into easily defined clusters.”&nbsp;



“Based on all the fossil evidence we currently have,&nbsp;T. rex&nbsp;stands alone as the single giant apex predator from the end of the Age of Dinosaurs in North America,” said Brusatte, who is currently a paleontologist at the University of Edinburgh but conducted his Ph.D. work at the Museum. “Tyrannosaurus rex&nbsp;remains the one true king of the dinosaurs,” he said.



The original paper, published in the journal Evolutionary Biology in March 2022, asserted that variation in the size of the second tooth in the lower jaw, and in the robustness of the femur in T. rex specimens, indicated the presence of multiple species. The authors of the rebuttal paper, published today in the same journal, took their own measurements of the same specimens and found different results. They also analyzed data on variation from 112 species of birds – which are all descended from theropod dinosaurs – in addition to data from four non-avian theropod dinosaurs.



“Their study claimed that the variation in&nbsp;T. rex&nbsp;specimens was so high that they were probably from multiple closely related species of giant meat-eating dinosaur,” said James Napoli, co-lead author of the rebuttal study and a graduating doctoral student in the Museum’s Richard Gilder Graduate School. “But this claim was based on a very small comparative sample. When compared to data from hundreds of living birds, we actually found that&nbsp;T. rex&nbsp;is&nbsp;less&nbsp;variable than most living theropod dinosaurs. This line of evidence for proposed multiple species doesn’t hold up.”



The authors of the new study also took issue with how the different groupings for the three putative species were determined statistically, using the tooth and femur measurements. In the original study, the statistical analysis defined the number of putative groups before the test was run, which is not an acceptable method for testing the hypothesis, according to the authors of the new study. In their new analysis, they used a different statistical technique to determine how many clusters exist within the data, and did not start out with any advanced assumptions. They found that the measurement data are best considered as a single group, representing only one species – T. rex.



“The boundaries of even living species are very hard to define: for instance, zoologists disagree over the number of living species of giraffe,” said co-author Thomas Holtz, from the University of Maryland and the National Museum of Natural History. “It becomes much more difficult when the species involved are ancient and only known from a fairly small number of specimens. Other sources of variation –changes with growth, with region, with sex, and with good old-fashioned individual differences – have to be rejected before one accepts the hypothesis that two sets of specimens are in fact separate species. In our view, that hypothesis is not yet the best explanation.”



“T. rex&nbsp;is an iconic species and an incredibly important one for both paleontological research and communicating to the public about science, so it’s important that we get this right,” said co-author David Hone from Queen Mary University of London. “There is still a good chance that there is more than one species of Tyranosaurus out there, but we need strong evidence to make that kind of decision.”



According to Brusatte, the results of the new study confirm that “Tyrannosaurus rex&nbsp;remains the one true king of the dinosaurs.”&nbsp;



---



By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

New study refutes the claim that T. rex was multiple species

The first&nbsp;fossilized skeleton of a Tyrannosaurus rex&nbsp;was discovered in 1902,...

According to a new study led by the <a href="https://www.ucalgary.ca/">University of Calgary</a>, nearly six percent of children who presented to the Emergency Department (ED) with <a href="https://www.earth.com/news/dogs-can-reliably-detect-long-covid-cases/">Covid-19</a> reported symptoms three months later. The experts found that initial hospitalization of two or more days, four or more symptoms at the initial ED visit, and age 14 or older were associated with higher risk of developing long Covid.



“We found that in some children, illness with Covid-19 is associated with reporting persistent symptoms after three months,” said study senior author Stephen Freedman, a professor of Emergency Medicine at the University of Calgary. “Our results suggest that appropriate guidance and follow-up are needed, especially for children at high risk for long Covid.”



The study included 1,884 children with Covid-19, who were followed-up for 90 days. Long Covid was found in almost ten percent of hospitalized children and five percent in those who were discharged from the ED. The most reported symptoms were fatigue, cough, and shortness of breath.



“Reported rates of long Covid in adults are substantially higher than what we found in children,” said study co-author Nathan Kuppermann, a professor of Emergency Medicine and Pediatrics at the <a href="https://www.ucdavis.edu/">University of California, Davis</a>. “Our findings can inform public health policy decisions regarding Covid-19 mitigation strategies for children and screening approaches for long Covid among those with severe infections.”



“Our finding that children who had multiple Covid-19 symptoms initially were at higher risk for long Covid is consistent with studies in adults,” added study co-author Todd Florin, an attending physician at <a href="https://www.luriechildrens.org/">Lurie Children’s Hospital</a> and associate professor of Pediatrics at <a href="https://www.northwestern.edu/">Northwestern University</a>.&nbsp;



“Unfortunately, there are no known therapies for long COVID in children and more research is needed in this area. However, if symptoms are significant, treatment targeting the symptoms is most important. Multidisciplinary care is warranted if symptoms are impacting quality of life,” he concluded.



The study is published in the journal <a href="https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2794484">JAMA Network Open</a>.



---



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

What are the risks of long Covid in children?

According to a new study led by the University of...

To save the world’s oceans, scientists are racing to find more <a href="https://www.earth.com/news/sustainable-farming-is-good-for-farmers-well-being/">sustainable</a> ways to make products such as Omega-3 fatty acids, biodiesel, aquaculture and livestock food. New research from <a href="https://www.flinders.edu.au/">Flinders University</a> discovered a simple, low-cost way to extract bioactives from single-cell algae oil – using waste sulfur from industries such as petrochemical production.&nbsp;



The research team built upon their existing body of work in sulfur chemistry to develop the innovative algae oil production process. The new method involves using waste sulfur to produce enriched saturated triglycerides from sustainably produced algae oil.&nbsp; &nbsp;



A single sulfur reaction is used to simultaneously produce polymers from polyunsaturated triglycerides and enrich saturated triglycerides for various value-added applications. The sulfur reaction can draw up to 90 percent of the unsaturated triglycerides from cultured single-cell algae.&nbsp;&nbsp;



“In this case, the algae oil is reacted with sulfur. The polyunsaturated triglycerides form polymers with many established uses, such as environmental remediation," explained Professor Justin Chalker. "The saturated triglycerides remain unreacted in this process, for recovery and ultimate conversion to value-added substances such as biodiesel."



"The unreacted oil is enriched in saturated triglycerides, which can be isolated by extraction for potential use in biodiesel production," wrote the study authors. "In this way, a single batch of sustainably produced algae oil can be converted into multiple useful products in a single step."



Professor Munish Puri has been working on single-cell oils to produce new materials for nutritional supplements, meat free alternatives, biodiesel and other products.



“There is growing interest in the bio-based production of lipids from algae,” said Professor Puri. “Single-cell thraustochytrids are especially attractive in this regard, as they can produce over 50 percent of their weight as triglycerides."



“But despite their promise, there remains a need for versatile downstream processing to enrich these so-called ‘single-cell oils’ into fatty acid classes based on degree of unsaturation. And that’s what this novel approach is helping to address.”&nbsp;&nbsp;



The study is published in the American Chemical Society journal <a href="https://pubs.acs.org/journal/ascecg">ACS Sustainable Chemistry &amp; Engineering</a>.



---



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

Experts develop a new method for making fish oil

To save the world’s oceans, scientists are racing to find...

<a href="https://www.earth.com/news/birds-could-rapidly-lose-the-traits-that-make-them-unique/">Birds</a> have additional cones in their retina which allow them to see ultraviolet colors that are invisible to humans. A new study from <a href="https://www.yale.edu/">Yale University</a> has revealed that, when it comes to colors that are visible to birds, hummingbirds have a plumage diversity that exceeds the known colors of all other bird species combined. The experts report that their discovery increases the total of known bird-visible plumage colors by 56 percent.



Professor Richard Prum is an ornithologist who has spent years studying the nanostructures that give birds their colorful plumage. He was surprised by what he found in hummingbirds.



“We knew that hummingbirds were colorful, but we never imagined that they would rival all the rest of the birds combined,” said Professor Prum.&nbsp;



For the investigation, study lead author Gabriela Venable collected data on the wavelengths of light reflected by feathers from 114 species of hummingbirds. This data was compared with colors found in 111 other bird species, including parrots and penguins.



Based on what they know about the visual abilities of birds, the researchers were able to identify plumage colors as seen by the birds themselves.



"Coloration has many functions in the lives of animals, including sexual and social communication, crypsis, aposematism, thermoregulation, and more. The phenomenon of animal coloration involves a cascade of physical and biological events beginning with the transmission of ambient light through an animal’s habitat and incident on its body, interacting with pigments and optical nanostructures in the animal integument, and reflecting back into the environment," wrote the study authors.&nbsp;&nbsp;



"The sensory component occurs when this light is transmitted through another individual’s eye and is absorbed by ocular pigments, leading finally to a perception of color. The field of sensory ecology encompasses research on all aspects of this cascade of phenomena."



The colors found in hummingbirds include saturated blues, blue-greens, and deep purples that are most variable on the animals’ crowns and throats. These parts of the body play a key role in mating displays and social interactions.



“Watching a single hummingbird is pretty extraordinary,” said Professor Prum. “But the combination of versatile optical structures and complex sexual displays make hummingbirds the most colorful bird family of all.”



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



---



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

Hummingbirds have more colors than all other birds combined

Birds have additional cones in their retina which allow them...

According to the <a href="https://beta.nsf.gov/">National Science Foundation</a> (NSF), better understanding the impact of climate change on our daily lives – in terms of increased wildfire frequency, lengthier allergy seasons, or changes in <a href="https://www.earth.com/news/study-reveals-key-genes-that-drive-insect-migration/">insect</a> populations and pollination processes – will help us rise to the challenge of climate mitigation, adaptation, and resilience.



Climate change has been steadily increasing the frequency of wildfires all over the world. In western U.S., for example, average fire events are up to four times the size, triple the frequency, and much more widespread in the 21st century than in the previous two decades. 



Moreover, hotter and drier nights are significantly hindering overnight wildfire suppression strategies, making it more difficult to deal with such extreme phenomena. Besides the immediate damage to ecosystems these fires cause, the particle pollutants from the smoke are a significant health hazard, leading to cardiovascular and respiratory diseases.



Another problem affecting a large proportion of the world’s population is the increased duration and intensity of allergy seasons. Changes in temperature and precipitations have led not only to longer allergy seasons, but also to increased pollen concentrations, which can give rise to respiratory diseases, or exacerbate pre-existing ones. Scientists argue that, in the U.S., the pollen season will soon last around 19 days longer than in the past years, and pollen emissions will increase by at least 16 percent.



Finally, the massive impact of climate change on insects is another issue that people around the globe will have to deal with. Climate change is currently affecting the balance of microbes in floral nectar, thus significantly endangering the health of pollinators and, potentially, humans, by reducing the availability of fresh foods. However, pollinators are not the only insects affected by rising temperatures. For instance, several species of ticks have been spreading beyond their normal ranges, increasing the risk of tick-borne diseases such as Lyme Disease or Erlichiosis.



According to NSF experts, a changing climate needs urgent climate action and resilience technologies. Planting flora that could sequester carbon or increasing our reliance on sustainable energy, for example, could help curbing greenhouse gas emissions and reduce global warming, thus decreasing the risks of extreme weather events and safeguarding vulnerable ecosystems.&nbsp;



&nbsp;---



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

Understanding climate change can increase resilience

According to the National Science Foundation (NSF), better understanding the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"]</div>



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



---



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

[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"]</div>



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



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



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



Video/ Image Credit: American Chemical Society&nbsp;



---



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



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

Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="3upvlAaHgO-2256633-12187" type="single"]</div>



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;



---



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

[sendtonews key="3upvlAaHgO-2256633-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"]</div>



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;



---



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



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

Detecting mercury contamination with the tap of a finger

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"]</div>



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



---



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



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

How does salt makes things taste better?

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JRaP49ISmm-2357509-12187" type="single"]</div>



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



---



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



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

Santiago, Chile in South America

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

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"]</div>



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;



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"]</div>



Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



---



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



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

Lesotho: Africa's "Kingdom in the Sky"

[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"] Lesotho: Africa's "Kingdom in the Sky" Today’s...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qjvhBOBnY8-2426650-12187" type="single"]</div>



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;



---



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

[sendtonews key="qjvhBOBnY8-2426650-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"]</div>



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



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0879czfG3k-1785905-12187" type="single"]</div>



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



---



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



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

The rapid retreat of the Columbia Glacier

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"]</div>



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



---



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...

Earth,Like,Exoplanet,3d,Render

<div class="wp-block-sendtonews-playerselector">[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"]</div>



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)



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JbW4VsY53O-1632195-12187" type="single"]</div>



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;



---



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



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qARzJPSabQ-2270617-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&nbsp;



---



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



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

Melt ponds on the Greenland Ice Sheet

[sendtonews key="qARzJPSabQ-2270617-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qas3EhyI0Y-2220951-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes a new map of Mars that is providing insight into the planet’s watery past. The map also reveals where future missions could safely land on Mars.&nbsp;



The map has been created over the last decade using observations of water-rich rocks and mineral deposits. The images were captured by ESA’s Mars Express and NASA’s Mars Reconnaissance Orbiter.



"A big surprise is the prevalence of these minerals, with the map revealing hundreds of thousands of water-affected locations in the oldest parts of the planet," says ESA. "The new data will help answer exciting questions about Mars’ climate history, whether water was globally persistent or confined to short, intense episodes, and whether the conditions were ever suitable for life."



"Specifically, the map shows the locations and abundances of aqueous minerals. These are from rocks that have been chemically altered by the action of water in the past, and have typically been transformed into clays and salts."



According to John Carter of the Institut d’Astrophysique Spatiale (IAS), our collective understanding of Mars has been oversimplified. He explained that planetary scientists have tended to think that only a few types of clay minerals on Mars were created during its wet period, then as the water gradually dried up, salts were produced across the planet.



The new map shows that the composition of Mars is much more complicated than what we thought. For example, while many salts formed after Martian clays, there are some salts that are presumed to be older than some of the clays.&nbsp;



“The evolution from lots of water to no water is not as clear cut as we thought, the water didn’t just stop overnight. We see a huge diversity of geological contexts, so that no one process or simple timeline can explain the evolution of the mineralogy of Mars. That’s the first result of our study. The second is that if you exclude life processes on Earth, Mars exhibits a diversity of mineralogy in geological settings just as Earth does,” said Carter.



Video Credit: ESA



---



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 history of Mars is much more complex than we thought

[sendtonews key="qas3EhyI0Y-2220951-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="vpljfR2VBX-2560867-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes how cavefish adapted to a sedentary lifestyle over tens of thousands of years. 



The experts found that the muscle metabolism of cavefish has been genetically reprogrammed over time. As a result, the animals have experienced major changes in their morphology and behavior. Despite these changes, however, the cavefish remain healthy and fit.



The research may provide new clues about the evolutionary consequences of prolonged physical inactivity in humans.&nbsp;



“It’s no surprise that people are moving less and less as technology has advanced,” said Rohner. “With cavefish, we have a unique system where we can study what might happen if people remained couch potatoes over very, very long periods of time.”



Video Credit: Stowers Institute for Medical Research



---



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.

Cavefish are healthy despite their sedentary lifestyle

[sendtonews key="vpljfR2VBX-2560867-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="MHyhtebibJ-2200368-12187" type="single"]</div>



Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> some of the most incredible waves in the world, as seen by Landsat satellites.



"With more than 370,000 miles of coastline on Earth, there are plenty of places where epic waves build up, curl over, and hurtle toward the shore.- much to the thrill of surfers," says NASA. "There are some places where these waves are so magnificent that they can be seen from space."



"With the broad perspective of satellites, we can see how these iconic waves develop into the world’s tallest, longest, fastest, and heaviest."



Video Credit: NASA Earth Observatory&nbsp;



---



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



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

Satellites capture the world's biggest and fastest waves

[sendtonews key="MHyhtebibJ-2200368-12187" type="single"] Today’s Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="761m2QQvR1-2035772-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes why satellite images and measurements of our planet have become "essential to our survival, offering a new outlook of our world."&nbsp;



Rising sea levels pose one of the biggest societal threats associated with climate change. According to ESA, satellite altimeter missions such as Copernicus Sentinel-6 are essential in monitoring global and regional changes in sea level.



"Unbeknown to many, the island of Crete, Greece, plays an important role in the Copernicus satellite altimetry constellation and on an international stage," reports ESA.



"Satellite altimetry data have to be continuously monitored at the ESA’s Permanent Facility for Altimetry Calibration where different techniques have pioneered the use of transponders to provide the best measurements to validate satellite altimeters in space soon after launch."



Dr. Craig Donlon explains that, by understanding planet Earth through satellite measurements, we are able to find evidence of change.&nbsp;



Video Credit: European Space Agency&nbsp;



---



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

Satellites have become essential to our survival

[sendtonews key="761m2QQvR1-2035772-12187" type="single"] Today’s Video of the Day from the...