The term "aging" generally conjures up images of graying hair, slowing pace, and the eventual appearance of wrinkles. Yet, beyond these physical markers, aging is a fundamentally cellular and molecular process, even for organisms like bacteria, which also experience age-related changes.



From humble single-celled organisms to complex mammalian systems, all living organisms experience the impact of passing time, according to a recent report from the <a href="https://asm.org/" target="_blank" rel="noreferrer noopener">American Society for Microbiology</a>.



As they age, cells accumulate damage that impairs function, leading to numerous age-related disorders in humans. But what about bacteria? Can these single-celled entities feel the passage of time?



<h2 class="wp-block-heading" id="h-bacteria-age-and-binary-fission-factor">Bacteria age and binary fission factor</h2>



<a href="https://www.earth.com/news/bacteria-use-biological-clocks-to-predict-and-survive-cold-weather/" target="_blank" rel="noreferrer noopener">Bacteria</a>, being single-celled organisms, propagate differently from humans. Rather than sexual reproduction, they undergo a process known as binary fission. 



In this process, they duplicate their DNA and divide into two, resulting in rapid replication. Interestingly, the fastest-growing bacterium can split in less than 10 minutes.



Historically, it was believed that bacteria, thanks to binary fission's symmetrical nature, did not age. After all, this process results in a parent and offspring identical in age, leading to a concept dubbed "functional immortality."



Aging, it was assumed, required an asymmetric division where the parent is older than the offspring.



<h2 class="wp-block-heading" id="h-aging-of-bacteria">Aging of bacteria</h2>



Contrary to the longstanding belief, evidence emerged in 2005, suggesting that, like us, <a href="https://www.earth.com/news/bacteria-and-imprint-new-era-dna-transformation/" target="_blank" rel="noreferrer noopener">bacteria</a> do age. The researchers found that Escherichia coli (E. coli) exhibit differences between "old" and "new" (parent and offspring) cells.



These distinctions became evident as scientists watched the cells divide under a microscope, noting that older cells' growth rate and offspring production decline over time. 



Moreover, the senior cells died more frequently than their younger counterparts. Clearly, despite similar appearances, cells underwent divisions that left them functionally asymmetric and susceptible to aging.



<h2 class="wp-block-heading" id="h-asymmetry-to-the-rescue">Asymmetry to the rescue</h2>



So, how does this asymmetry help? It turns out, this type of division is crucial for the population's overall fitness. 



An asymmetric division maintains variance, the variety upon which natural selection acts. More variation typically means a better chance of survival under changing conditions.



One of the key players in this aging process is protein aggregation. This process occurs in bacteria and eukaryotic cells and is associated with age-related diseases in humans, such as Alzheimer's and Parkinson's, where harmful protein clumps can lead to cell death.



In <a href="https://www.earth.com/news/hungry-bacteria-will-devour-plastic-waste/" target="_blank" rel="noreferrer noopener">bacteria</a>, scientists found a smart way of dealing with this problem. As a feature of asymmetric division, older cells accumulate these proteins segregating age-related damage and keeping their offspring looking "younger" at the molecular level.



<h2 class="wp-block-heading" id="h-cellular-states-of-stress">Cellular states of stress</h2>



Another culprit contributing to aging, both in humans and bacteria, is stress. E. coli cells activate a stress state inside the cell to survive mutations accumulated over their lifetimes. 



Some of these mutations, while not lethal, can negatively impact the cell's fitness by causing a critical protein to lose its function.



In a study analyzing the effects of over 60 different nonlethal loss-of-function mutations in E. coli, researchers found that these mutants increased their metabolic activity to compensate for lost protein function. 



Still, this adaptation comes at a cost. These cells grow slower and enter a state similar to purgatory faster than non-mutants, especially in nutrient-poor environments.



The findings suggest an "aging cost" associated with maintaining resistance to stress on a population level. Could understanding bacterial aging lead us to new antibiotic targets? Might this ancient mechanism of aging shed light on certain human diseases perpetuated through cellular stress states?



<h2 class="wp-block-heading" id="h-complexities-of-aging">Complexities of aging</h2>



Time and age certainly doesn't stand still for anyone, humans and <a href="https://www.earth.com/news/how-soil-bacteria-contribute-to-atmospheric-co2/" target="_blank" rel="noreferrer noopener">bacteria</a> included. But perhaps bacteria's susceptibility to aging is a blessing in disguise. 



These hardy organisms make excellent subjects for studying the nuances of aging, given their rapid growth and the ability to observe numerous generations in a single experiment. After all, understanding the complexity of aging is inherent to unlocking the mysteries of life itself.



The discovery that bacteria are not eternal beings, as once thought, but vulnerable to aging like all living organisms, signifies the interconnectedness of life at every level.



The concept of time, aging, and the decline in function straddle across the biological spectrum, making it possible to draw parallels between the simplest life forms and the most complex ones.



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Do bacteria age or are they immortal?

The term "aging" generally conjures up images of graying hair, slowing pace, and the eventual appearance of wrinkles. Yet, beyond these physical markers, aging is a fundamentally cellular and molecular process, even for organisms like bacteria, which also experience age-related changes. From humble single-celled organisms to complex mammalian systems, all living organisms experience the impact of passing time, according to a recent report from the American Society for Microbiology. As they age, cells accumulate damage that impairs function, leading to numerous age-related disorders in humans. But what...

A new study led by the <a href="https://icahn.mssm.edu/">Icahn School of Medicine at Mount Sinai</a> has found that exposure to <a href="https://www.earth.com/news/illegal-cannabis-farms-infringe-on-crucial-animal-habitats/">THC</a>, the main psychoactive ingredient of cannabis, can cause birth defects in genetically-predisposed mice.&nbsp;



Cannabis is one of the most frequently used recreational drugs, and is also one of the most common drugs used by pregnant women. However, its effects on embryonic development are not yet clearly understood.&nbsp;



Although it is still restricted in most countries, cannabis has been increasingly legalized for recreational and medical consumption in a variety of places, thus causing the number of its consumers to grow significantly.&nbsp;



According to a research team led by Robert Krauss, a professor of Cell, Developmental, and Regenerative Biology at the Icahn School of Medicine, exposure to THC could exacerbate a mutation that affects a mechanism that cells use to communicate to each other called <a href="http://annalsofneurosciences.org/journal/index.php/annal/article/view/531">Hedgehog signaling</a>.&nbsp;



“Several years ago, it was reported that THC could inhibit Hedgehog signalling in cells grown in a dish,” said Professor Krauss. “We reasoned that THC might be an environmental risk factor for birth defects, but that it would require additional risk factors, such as specific mutations in the genes required for Hedgehog signalling, to induce these defects in mice.”



In order to test this hypothesis, the scientists administered a single dose of THC to pregnant mice approximately a week after conception. Afterward, they studied the embryonic development of the pups, some of which carried a mutation affecting their Hedgehog signaling system.&nbsp;



The researchers discovered that the pups without the mutation developed normally, even when exposed to THC. However, the pups that carried the mutation and were exposed to the drug developed a face and brain defect called holoprosencephaly, which is characterized by the failure of the embryonic brain to divide into two lobes.



The findings could have important implications for human health too. “The THC concentration in cannabis is now very high, so it is important to perform epidemiology studies looking at whether cannabis consumption is associated with developmental defects."&nbsp;



"Women are already advised not to consume cannabis while pregnant, but our results show that embryos are sensitive at a very early period, before many women know they are pregnant. Cannabis consumption may therefore be inadvisable even when women are trying to get pregnant,” warned Professor Krauss.



The study is published in the journal <a href="https://dx.doi.org/10.1242/dev.199585">Development</a>.



---



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

How does cannabis use affect embryonic development?

A new study led by the Icahn School of Medicine...

The virtues of spiders’ silk have been extolled since ancient times when the Greeks and Romans apparently used bandages of spider <a href="https://www.earth.com/news/snake-eating-spiders-live-on-every-continent-except-antarctica/">web</a> to help staunch bleeding and heal wounds, cuts and scrapes. 



In the past decade, many studies have investigated the antimicrobial properties of spiders’ silk in order to back up the myth with empirical findings. Some studies have confirmed antimicrobial activity, while others have rejected it. In short, the topic has become a bit of a tangled web.



“Spider silk has always been admired and almost has a mythical status,” said Trine Bilde, a professor of Biology at <a href="https://international.au.dk/">Aarhus University</a> in Denmark. “It’s one of these myths that seems to have become ‘established’ by ‘belief’ and not by strong empirical support.”



In the light of this contradictory evidence, a team of researchers set out to assess the antimicrobial properties of different types of silk from seven species of spiders. They tested whether the silk would affect various types of bacteria, namely Gram-negative Escherichia coli and Pseudomonas putida, and Gram-positive Bacillus subtilis, using direct contact or diffusion disc assays.&nbsp;



Having silk with antimicrobial properties could possibly benefit spiders in two ways. Firstly, it may protect the spiders and secondly, it may protect the silk itself. Spiders often hide in burrows that are lined with silk, and their eggs are always encased in silk structures.&nbsp;



In particular, social spiders that live in large groups may be protected from the spread of pathogens by antibiotic silk. These spiders have weakened immune systems from inbreeding, so they are especially vulnerable to infection. However, Professor Bilde and her team of researchers found no evidence of antimicrobial activity in the silk of social spiders.&nbsp;



“We were unable to detect antimicrobial activity of social spider silk, regardless of method or microbe, and this made us curious about why other studies were able to,” said Professor Bilde. “We then started scrutinizing the papers reporting antimicrobial activity in fine detail and became aware of methodological shortcomings.”



Two main methodological issues were identified. Some of the past studies had not adequately controlled for contamination of silk samples by bacteria, while other studies had not controlled for the effects of the solvent used to extract the spiders’ silk. The studies may have been compromised for either of these reasons.



Using improved experimental procedures, the researchers found no evidence of antimicrobial activity in the samples of silk that they tested. Since they only tested silk from seven spider species, they cannot rule out silk with antimicrobial properties from other, untested species. However, their results do cast doubt on previous investigations.&nbsp;



“Rather than assuming that spider silk is antimicrobial, we should now assume that it isn’t,” said Professor Bilde. “We can still test the idea in new species and with new organisms, but with a more cautious starting point.”



The study is published in the journal <a href="https://www.cell.com/iscience/home">iScience</a>.



---



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

Antimicrobial property of spiders’ silk is a myth

The virtues of spiders’ silk have been extolled since ancient...

Little,Girl,Whispering,A,Joke,In,A,Boy's,Ear,,Boy

A new study has confirmed a strong correlation between humor and <a href="https://www.earth.com/news/artificial-intelligence-can-predict-the-future-of-arctic-sea-ice/">intelligence</a> among children. The researchers found that children are better able to produce humor when they have higher levels of general knowledge and verbal reasoning.



The study was focused on 217 Turkish middle-school students with a wide range of intelligence. The results suggest that the link between humor and intelligence is much stronger in children than adults.



"Humor has been considered a sign of high intelligence throughout human history," explained the study authors. "For example, during competitions for women to mate within ancient times, men engaged in humor to demonstrate their cleverness and adaptability."



"In scientific research, intelligence has been found to predict humor ability partly. People who quickly and easily produce witty ideas are considered highly intelligent."



While many previous studies had looked at the correlation between intelligence and humor in adults, there is much less relevant research that is focused on children.



For the investigation, the students were asked to create captions for 10 cartoons. Experts rated the funniness of the captions, as well as their relevance to the cartoons, for a total of 30,380 ratings.



When the researchers compared the ratings with the intelligence of the children, they found that general intelligence was highly correlated with humor.&nbsp;



The study authors emphasize that the cultural context plays an important role in the strength of the link between intelligence and humor. They note that both humor and intelligence are shaped by cultural norms, beliefs and values.&nbsp;



Prior research on humor and intelligence has mostly been carried out in Western cultures, but the new study explored the relationship in Turkish culture, which is a blend of Western and Eastern cultures.



“While humor is frequently used for entertainment by adults, children use it mostly for peer acceptance. Therefore, the nature of adult and child humor differs,” said study lead author Professor Ugur Sak of Anadolu University.



“We were particularly interested in the quality of humor made by children but evaluated by adults. Parents and teachers should be aware that if their children or students frequently make good quality humor, it is highly likely that they have extraordinary intelligence.”



The study is published in <a href="https://doi.org/10.1515/humor-2021-0054">Humor - International Journal of Humor Research</a>.



---



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

Humor is a clear sign of intelligence among children

A new study has confirmed a strong correlation between humor...

Globe skimmer dragonflies (Pantala flavescens) are too small to be fitted with radio or GPS tracking devices like birds. Researchers, however, suspect the little insects might be doing something very birdlike - <a href="https://www.earth.com/news/surprising-insights-into-the-migrations-of-arctic-terns/">migrating</a> thousands of miles. In 2009, marine biologist Charles Anderson hypothesized that the globe skimmers were migrating from India to East Africa, and scientists are now testing that hypothesis. 



The research team closely examined the physiology of the dragonflies, calculating how long one could fly with the calories carried in its small body. The scientists then looked at wind currents and other meteorological data. Interestingly, the researchers found that it was possible for the globe skimmer dragonflies to be crossing the Indian Ocean from India to Africa.&nbsp;



“Our study shows that this migration from India to East Africa is actually possible," said Johanna Helund of <a href="https://www.lunduniversity.lu.se/">Lund University</a>. "However, the globe skimmer dragonfly can’t manage it using only the fat it can store in its body. It also requires favorable winds and these are present during certain periods of the year.”



The scientists said that most animals, whether bird or insect, use favorable winds to migrate. They noted that climate change will hurt the globe skimmer migrations, as well as other animal migrations.&nbsp;



The research is important in showing the amazing lives of other animals as well as the interconnectedness of the global ecosystem. Beyond that, it comes closer to solving a specific mystery of where the dragonflies are going when they fly from the coast of India or East Africa.&nbsp;



“We have got a lot closer to solving the mystery of how a tiny dragonfly, which only weighs 300 milligrams, can cross 2 000 kilometers of open sea," said Hedlund.



The study is published in the journal <a href="https://www.frontiersin.org/journals/ecology-and-evolution">Frontiers in Ecology and Evolution</a>.



---



By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Dragonflies may migrate across the Indian Ocean

Globe skimmer dragonflies (Pantala flavescens) are too small to be...

The Eastern massasauga rattlesnake is threatened. As with many endangered species, <a href="https://www.earth.com/news/inbreeding-is-more-common-today-than-45000-years-ago/">inbreeding</a> was an unfortunate part of the snake’s recent history. When scientists investigated the impact of inbreeding on the rattlesnakes, they found something surprising.&nbsp;



The team sequenced the genes of 90 Eastern massasauga rattlesnakes and found fewer dangerous mutations than expected. For comparison, the researchers analyzed the genetics of 10 near relative, western massasauga rattlesnakes.&nbsp;



“This is something that has been reported very recently in other endangered species, but it’s the first time it’s been shown in a reptile," said study senior author Professor H. Lisle Gibbs of <a href="https://www.osu.edu/">The Ohio State University</a>.



"We always worry about genetics and the loss of variation and what it means to be in a small population in which there’s lots of inbreeding. At least in this species, maybe it’s not such a big deal."



"From a conservation perspective, perhaps we can downplay genetics and say ecology – such as habitat restoration – is more important.”



The Eastern massasauga rattlesnake lives in small populations throughout a fragmented habitat, where a breeding population may be as small as 30 individuals. Typically, dangerous mutations accumulate in small populations of any sexual organism.&nbsp;



“Through years and years of study, we know that most populations are isolated, like little natural zoos scattered throughout the landscape," said Gibbs. "Due to habitat degradation, we’ve known they show little variation – but we’ve never actually looked at variation in genes that code for things that matter to a rattlesnake.”



It seems that the Eastern massasauga rattlesnake was already well adapted to living in small populations. The Western massasauga rattlesnake, on the other hand, showed a history of living in a more connected, larger population of snakes in its genetics.&nbsp;



The western species had more negative mutations in its genome but was protected from them because it was unlikely that two snakes with the same mutation would breed. With only one copy of a mutation, an individual is protected by a good copy of the same gene. It appears that Eastern massasauga snakes - through their long history of living in small, isolated populations - were purged of their dangerous mutations.&nbsp;



The interesting results help prioritize habitat restoration over the introduction of new genes for the protection of the threatened rattlesnakes. It may also help scientists rethink what it means to live in a small population.&nbsp;&nbsp;



The study is published in the journal <a href="https://onlinelibrary.wiley.com/journal/1365294x">Molecular Ecology</a>.



---By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Inbreeding is not a problem for the Eastern massasauga rattlesnake

The Eastern massasauga rattlesnake is threatened. As with many endangered...

Society is becoming increasingly aware of the detrimental effects that rising CO2 levels will have on the climate, but until recently, little has been known about the effect that this will have on <a href="https://www.earth.com/news/scientists-investigate-the-origin-of-photosynthesis/">photosynthesis</a>. A new study led by the <a href="https://www.birmingham.ac.uk/">University of Birmingham</a> exposed old oak trees to elevated levels of CO2.. Over the course of three years, the 175-year-old oaks responded to rising CO2 levels by increasing their rate of photosynthesis.



The team worked in collaboration with colleagues from Western Sydney University’s EucFACE eucalyptus forest. The university is conducting the experiment with an old oak forest, using CO2 levels that represent the average levels expected by 2050.&nbsp;



The researchers measured carbon levels within the wood, roots, leaves, and soil of the oak trees in order to pinpoint changes in photosynthesis and locate where and how excess CO2 is stored.



“I’m really excited to contribute the first published science results to BIFoR FACE, an experiment of global importance," expressed lead researcher Anna Gardner. “It was hard work conducting measurements at the top of a 25 m oak day after day, but it was the only way to be sure how much extra the trees were photosynthesizing."



The results of the study concluded that photosynthesis rates of the oak trees increased by up to a third, with the highest rate of change being found in trees exposed to strong sunlight.



It was also discovered that ratios of the key nutrients carbon and nitrogen did not change in the leaves, demonstrating that the old oak trees can adapt to redirect nitrogen into the soil to balance out the increased intake of carbon.



“Previous work at EucFACE measured photosynthesis increased by up to a fifth in increased carbon dioxide," explained Professor David Ellsworth. "So, we now know how old forest responds in the warm-temperate climate that we have here in Sydney and the mild temperate climate of the northern middle latitudes where Birmingham sits. At EucFACE we found no additional growth in higher CO2, and it remains to be seen if that will be the case for BIFOR as well.”



“We are sure now that the old trees are responding to future carbon dioxide levels," said Professor Rob MacKenzie, Founding Director of BIFoR. "How the entire forest ecosystem responds is a much bigger question requiring many more detailed investigations. We are now pushing ahead with those investigations.”



The results of the study have been published in the journal <a href="https://academic.oup.com/treephys">Tree Physiology</a>.



---



By <a href="mailto:calumvaughan05@gmail.com">Calum Vaughan</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Old oak trees ramp up photosynthesis in response to rising CO2

Society is becoming increasingly aware of the detrimental effects that...

The effects of climate change are resulting in increasingly frequent wildfires in the Western U.S that are detrimental to the <a href="https://www.earth.com/news/plants-transmit-signals-to-defend-against-environmental-threats/">environment</a>. While the effect of wildfires on tree cover is clear, many are unaware of an increasing number of smoke-related deaths.



New research from <a href="https://www.gwu.edu/">George Washington University</a> has concluded that smoke exposure from Western U.S. wildfires is contributing to health problems across North America, with almost three-quarters of smoke-related deaths and hospital visits occurring east of the Rocky Mountains.



The researchers have hypothesized that increasing levels of smoke are contributing to over one percent of annual ER visits in Western U.S. Despite lower smoke concentrations in the East, smoke-related issues still contribute to up to 0.6 percent of hospital visits. The study estimates that long-term smoke exposure results in an additional 6,300 annual excess deaths, with just 1,700 of these occurring in the West.



This increase in deaths is the result of the enormous quantities of toxic gases and soot resulting from wildfires, including microscopic smoke particles named PM2.5. Short-term effects of exposure to PM2.5 include respiratory health problems, with long-term exposure being linked to heart disease and lung cancer.



"Large wildfires are projected to increase in frequency in the Western U.S. Because of that, fires are expected to become the dominant source of PM2.5 in the U.S. by the end of the century," explained atmospheric scientist and study lead-author Katelyn O'Dell. "We wanted to study the impacts of wildfire smoke specifically on health so we can better prepare for that future, when we expect to have more smoke in our lives."



The research team used existing data on respiratory-related hospital visits and daily PM2.5 estimates to provide the new predictions on wildfire-related deaths. The study also analyzed 18 hazardous air pollutants (HAPS) such as benzene and formaldehyde, determining that these are less damaging than PM2.5.



While it may be too late to stop increasing rates of Western U.S. wildfires, the researchers emphasize that harm can be reduced by increasing efforts to forecast smoke and by advising citizens to take precautions, such as limiting time outside and wearing filtration masks.



Tarik Benmarhnia, a climate change epidemiologist at the University of California, noted that while smoke plumes impact entire regions, they don't affect all residents of different ages and ethnicities equally. By investigating these disparities through further research, he believes that further harm can be reduced&nbsp;&nbsp;



"The conclusion of the study is important," said Benmarhnia. "We systematically underestimate the real public health impact of wildfires, which is related to smoke. And smoke can travel very, very far away."



The results of the study have been published in the journal <a href="https://agupubs.onlinelibrary.wiley.com/journal/24711403">GeoHealth</a>.



---



By <a href="mailto:calumvaughan05@gmail.com">Calum Vaughan</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Wildfires in the West linked to smoke-related deaths in the East

The effects of climate change are resulting in increasingly frequent...

There is evidence that psychedelic mushrooms, popularly known as “magic mushrooms,” have been consumed by humans for over six millennia. In 1958, Swiss chemist Albert Hoffman was the first to isolate and synthesize <a href="https://www.earth.com/news/psilocybin-treatment-rapidly-relieves-symptoms-of-major-depression/">psilocybin</a>, the main psychoactive ingredient of magic mushrooms. The potential for psilocybin to treat severe depression has been scientifically acknowledged, and clinical trials are currently underway.&nbsp;



A new study has found that psilocybin also enhances emotional responses to music among healthy individuals. Researchers from the <a href="https://www.ku.dk/english/">University of Copenhagen</a> and <a href="https://www.imperial.ac.uk/">Imperial College London</a> tested a cohort of participants on their emotional response to music after being given psilocybin. In addition, a control group was given ketanserin, an antihypertensive drug with no marked psychological effects.&nbsp;



At the peak of the psilocybin effects, participants listened to a short music program, comprising Elgar’s Engima Variations no. 8 and 9 and Mozart’s Laudate Dominum, and were asked to rate their emotional response according to the <a href="https://www.uibk.ac.at/psychologie/fachbereiche/pdd/personality_assessment/gems/about-the-gems/index.html.en">Geneva Emotional Music Scale</a>.



Study lead author Dea Siggaard Stenbæk is an associate professor who specializes in Affective Cognitive Neuroscience and Crisis Psychology at the University of Copenhagen.



“We found that psilocybin markedly enhanced the emotional response to music, when compared to the response before taking the drugs. On the measurement scale we used, psilocybin increased the emotional response to music by around 60 percent,” said Professor Stenbæk. 



“This shows that the combination of psilocybin and music has a strong emotional effect, and we believe that this will be important for the therapeutic application of psychedelics if they are approved for clinical use. Psilocybin is under development as a drug to treat depression, and this work implies that music needs to be considered as a therapeutic part of the treatment.”



The findings suggest that the enhanced emotional processing may be a positive outcome of combining psylocibin with music, which means that scientists should use music as an active component of psylocibin therapy. 



David J. Nutt, a professor of Neuropharmacology at Imperial College London, said that psilocybin-based depression treatments could be optimized by personalizing the music tracks used in therapy.



According to the study authors, understanding the contribution of enhanced music-evoked emotions to other psychedelic phenomena - such as mystical type experiences - will also be important for establishing music as a key element in psychedelic therapy.



This research was presented at the <a href="https://www.ecnp.eu/Congress2021/ECNPcongress">European College of Neuropharmacology (ECNP) Congress</a> in Lisbon, Portugal.



---



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

Magic mushrooms enhance music appreciation

There is evidence that psychedelic mushrooms, popularly known as “magic...

Mangroves are a type of <a href="https://www.earth.com/news/aspen-trees-change-their-genetic-structure-to-adapt/">trees</a>, palms, and shrubs that are usually found along tropical and subtropical coastlines, thriving in the vicinity of salt water. However, an ancient mangrove ecosystem located in the Yucatán Peninsula more than 120 miles away from the nearest ocean has recently attracted considerable scientific attention due to its unusual location.



Carlos Burelo, a native of the region and researcher at the <a href="https://www.ujat.mx/">Universidad Juárez Autónoma de Tabasco</a>, drew the attention of the scientific community to the existence of this ecosystem in 2016. “I used to fish here and play on these mangroves as a kid, but we never knew precisely how they got there,” said Burelo. “That was the driving question that brought the team together.”



Integrating geologic, genetic, and vegetation data with sea-level modeling, the scientists found that the mangrove forests had reached their current location during the last interglacial period, about 125,000 years ago, and have remained there in isolation as the temperatures dropped and the oceans receded during the last Ice Age.



“The most amazing part of this study is that we were able to examine a mangrove ecosystem that has been trapped in time for more than 100,000 years,” said study co-author Octavio Aburto-Oropeza, a Marine Ecologist at the <a href="https://scripps.ucsd.edu/">Scripps Institution of Oceanography</a>.&nbsp;



“There is certainly more to discover about how the many species in this ecosystem adapted throughout different environmental conditions over the past 100,000 years. Studying these past adaptations will be very important for us to better understand future conditions in a changing climate.”



The study sheds light on the extensive landscape impact past periods of climate change had on the world’s coastlines. During the last interglacial period, most of the Gulf of Mexico’s coastal lowlands were under water, which retreated only when temperatures started to fall. However, besides providing a glimpse into the ancient geography of the Mexican tropics, these findings also help us better understand how current climate change could affect <a href="https://www.earth.com/news/sea-levels-are-rising-at-an-alarming-rate/">sea-levels</a>.&nbsp;



“The story of Pleistocene glacial cycles is written in the DNA of its plants waiting for scientists to decipher it but, more importantly, the San Pedro mangroves are warning us about the dramatic impact that climate change could have on the coastal plains of the Gulf of Mexico if we do not take urgent action to stop the emission of greenhouse gases,” the authors concluded.



The study is published in the journal <a href="https://dx.doi.org/10.1073/pnas.2024518118">Proceedings of the National Academy of Sciences.</a>



---



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

Mangrove forest reveals ancient climate change effects

Mangroves are a type of trees, palms, and shrubs that...

Global warming is rapidly heating up the <a href="https://www.earth.com/news/the-ingredients-of-life-are-with-planets-at-their-birth/">planet</a>, and the issue is becoming increasingly problematic in urban environments. A new study of more than 13,000 cities has concluded that the number of days people are being exposed to extreme heat and humidity has tripled since the ‘80s.



The researchers, based at Columbia University’s <a href="https://www.earth.columbia.edu/">Earth Institute</a>, have concluded that the trend is the result of both rising temperatures and urban population growth. Vegetation and nature helps cool the countryside, while the abundance of impermeable surfaces in urban environments makes it difficult for heat to escape.&nbsp;&nbsp;



“This has broad effects,” explained study lead author Cascade Tuholske. “It increases morbidity and mortality. It impacts people’s ability to work, and results in lower economic output. It exacerbates pre-existing health conditions.”



The researchers found that the number of person-days that city dwellers were exposed to extreme heat and humidity rose by 79 billion between 1983 and 2016. This data was achieved by using infrared satellite imagery, heat, and humidity readings across 13,115 cities.



Using these instruments, the researchers counted days of extreme heat based on "real feel" temperatures on the "wet-bulb globe temperature" that exceeded 106 degrees Fahrenheit.



Across this data, two-thirds were accounted for by urban population growth. The cities that were the most affected were clustered at low altitudes. The Bangladesh capital of Dhaka topped the list at 575 person-days, with other cities such as Shanghai, Bangkok, and Dubai suffering similar rates of extreme heat.



“A lot of these cities show the pattern of how human civilization has evolved over the past 15,000 years,” stated Tuholske, pointing out that many cities are located in warm climates where humidity is delivered by big river systems such as The Nile and the Ganges. “There is a pattern to the places where we wanted to be - now, those areas may become uninhabitable. Are people really going to want to live there?”



Many other major cities saw over half of their extreme heat and humidity exposure because of climate change alone, with cities such as Baghdad and Mumbai taking the hardest hit. European cities have seen relatively static population growth, so exposure increases in the continent have been almost entirely caused by global warming. On the other hand, cities in the U.S. - particularly in Texas and across the Gulf Coast - have seen exposure increases due to both population increase and climate change.



Kristina Dahl, a climate researcher at the Union of Concerned Scientists, explained that the study could serve as a starting point for identifying ways to address local heat issues, such as planting trees and other mitigation methods. “This study shows that it will take considerable, conscientious investments to ensure that cities remain liveable in the face of a warming climate,” said Dahl.



The research has been published in the <a href="https://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.



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By <a href="mailto:calumvaughan05@gmail.com">Calum Vaughan</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Urban exposure to extreme heat has tripled since the ‘80s

Global warming is rapidly heating up the planet, and the...

Domestic cats may be natural hunters, but a new study from the <a href="https://www.exeter.ac.uk/">University of Exeter</a> shows that they still get most of their food from people. The results of the study indicate that cats go <a href="https://www.earth.com/news/climate-change-threatens-seal-hunting-in-alaska/">hunting</a> out of instinct rather than hunger. 



"Predation of wildlife by domestic cats Felis catus presents a threat to biodiversity conservation in some ecological contexts," wrote the study authors.



"The proportions of wild prey captured and eaten by domestic cats and thus the contributions of wild prey to cat diets are hard to quantify. This limits the understanding of any impacts of cats may have on wild animal populations and confounds analyses of the effects of interventions aimed at reducing wildlife killing."



To investigate what cats had been eating, the researchers used forensic evidence from their whiskers. An analysis of stable isotope ratios revealed that about 96 percent of their diet came from food provided by their owners, while just three or four percent came from eating wild animals. 



"When food from owners is available, our study shows that cats rely almost entirely on this for nutrition," said study lead author Dr. Martina Cecchetti.



"Some owners may worry about restricting hunting because cats need nutrition from wild prey, but in fact it seems even prolific hunters don't actually eat much of the prey they catch."



"As predators, some cats may hunt instinctively even if they are not hungry - so-called 'surplus killing' - to capture and store prey to eat later."



The researchers also tested different measures that are used to prevent domestic cats from killing wild prey, including bells, Birdsbesafe collar covers, and meat-rich diets. Susan Morgan is the Chief Executive of Songbird Survival, which funded the research.



"This study reassures owners of cats who hunt that the motive to hunt is instinctive, not driven by nutritional needs," said Morgan.



"Furthermore, pet owners can help us reverse the shocking decline in songbirds via three simple, 'win-win' steps: fit collars with a Birdsbesafe cover; feed cats a premium meaty diet; play with cats for five to ten minutes a day to 'scratch that itch' to hunt."



"In the UK, we've lost half our songbirds in 50 years, but we can all help to stem this tide."



The study is published in the journal <a href="https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecs2.3737">Ecosphere</a>.&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

Domestic cats go hunting out of instinct rather than hunger

Domestic cats may be natural hunters, but a new study...

The discovery of a million-year-old <a href="https://www.earth.com/news/fossilized-tooth-diet-giant-ground-sloth/">tooth</a> is the earliest evidence to date of giant hippos in the UK. In a new study, scientists have matched the tooth to an extinct species of hippo called Hippopotamus antiquus. The massive animals, which weighed around three tons, ranged across Europe in warm periods during the Ice Age.



The tooth was uncovered during excavations at Westbury Cave in Somerset, led by Neil Adams, a PhD researcher in the Centre for Palaeobiology Research at the <a href="https://le.ac.uk/">University of Leicester</a>. The researchers found that the fossil is over one million years old. This beats the previous record of the oldest hippo in the UK by at least 300,000 years.



“It was very exciting to come across a hippo tooth during our recent excavations at Westbury Cave. It is not only the first record of hippo from the site, but also the first known hippo fossil from any site in Britain older than 750,000 years," said Adams.&nbsp;



“Erosion caused by the coming and going of ice sheets, as well as the gradual uplift of the land, has removed large parts of the deposits of this age in Britain. Our comparisons with sites across Europe show that Westbury Cave is an important exception and the new hippo dates to a previously unrecognized warm period in the British fossil record.”



There is a major gap in the fossil record in Britain between about 1.8 and 0.8 million years ago - a time when early humans were arriving in Europe. The new study suggests that there were periods of time that were warm and wet enough to allow hippos to migrate all the way from the Mediterranean to southern England.



“Hippos are not only fabulous animals to find but they also reveal evidence about past climates. Many megafaunal species (those over a tonne in weight) are quite broadly tolerant of temperature fluctuations but in contrast, we know modern hippos cannot cope with seasonally frozen water bodies," explained study co-author Professor Danielle Schreve of Royal Holloway.



“Our research has demonstrated that in the fossil record, hippos are only found in Britain during periods of climatic warmth, when summer temperatures were a little warmer than today but most importantly, winter temperatures were above freezing.”



According to the study, the Westbury Cave hippo was likely to have lived during a particularly warm period around 1.1 to 1.0 million years ago.



The study is published in the <a href="https://onlinelibrary.wiley.com/journal/10991417">Journal of Quaternary 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

Million-year-old tooth is the earliest evidence of hippos in the UK

The discovery of a million-year-old tooth is the earliest evidence...

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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

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

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



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



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



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



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



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



Video/ Image Credit: European Space Agency&nbsp;



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



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

Kainji Lake in north central Nigeria

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



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



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



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



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



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



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



Video Credit: Amanda Nguyen/University of Illinois



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



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

Designing crops that can beat the heat

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

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



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



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



Video Credit: ACS Reactions



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



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

How does salt makes things taste better?

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



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



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



Video/ Image Credit: ESA



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



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

Santiago, Chile in South America

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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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Remote sensing will revolutionize the way we monitor trees

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



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



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



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



Video Credit: ESA&nbsp;



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



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

The city of Dublin on Ireland's east coast

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



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



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



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



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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



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



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



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



Video Credit: NASA Goddard



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



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

Wetlands are a major source of methane emissions

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



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



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



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



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



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



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



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



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



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



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

The rapid retreat of the Columbia Glacier

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

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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

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



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



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



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



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



Video Credit: Stowers Institute for Medical Research&nbsp;



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



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

How the immune system responds to injury

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

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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

2022 illustrated the consequences of a warming climate

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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

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



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



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



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



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



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



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



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

Tiger sharks are shifting poleward as temperatures rise

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