Circadian rhythms are the natural, internal processes that regulate the sleep-wake cycle and repeat roughly every 24 hours. 



These rhythms, influenced by environmental cues like light and darkness, play a crucial role in various bodily functions ranging from sleep regulation to hormone release.



When these rhythms fall out of sync - due to factors such as artificial lighting, irregular schedules, or travel across time zones - people can experience disruptions in sleep, mood, and overall well-being.



<h2 class="wp-block-heading" id="h-lights-reset-circadian-rhythms">Lights reset circadian rhythms</h2>



New research has revealed that the vibrant blue and orange hues seen at sunrise and sunset may hold the key to resetting these rhythms. 



By mimicking these natural light cycles, scientists at the University of Washington in Seattle have developed a novel LED light that emits alternating wavelengths of blue and orange. 



The LED device, designed to realign circadian rhythms, has been proven to significantly advance melatonin production. This could offer a promising solution for those suffering from sleep disorders and other health issues linked to circadian misalignment. 



<h2 class="wp-block-heading" id="h-improving-circadian-health">Improving circadian health</h2>



Published in the Journal of Biological Rhythms, the research represents a breakthrough in how humans can influence circadian rhythms. 



The findings hold significant promise for improving circadian health. Study co-author Jay Neitz is a professor of ophthalmology in the UW School of Medicine. 



“Our <a href="https://www.earth.com/news/exercising-shift-internal-clock/" target="_blank" rel="noreferrer noopener">internal clock</a> tells us how our body's supposed to act during different times of day, but the clock has to be set. If our brain is not synced to the time of day, then it's not going to work right," said Professor Neitz.



<h2 class="wp-block-heading" id="h-disrupted-circadian-rhythms">Disrupted circadian rhythms </h2>



The study suggests new strategies to combat seasonal affective disorder (SAD) and other health issues linked to disrupted circadian rhythms, offering hope for improving <a href="https://www.earth.com/news/sleep-quality-is-determined-by-daily-activities/" target="_blank" rel="noreferrer noopener">sleep quality</a>, mood stabilization, and overall mental health.



Circadian rhythms are naturally reset daily by the 24-hour solar light-dark cycles, which help regulate our biological processes in alignment with the environment. 



Professor Neitz noted that the light used in the LED device has alternating blue and orange wavelengths which stimulate the circuit that our brains use to reset our internal clocks.



<h2 class="wp-block-heading" id="h-the-role-of-melatonin">The role of melatonin </h2>



<a href="https://www.earth.com/news/melatonin-keeps-fruits-and-vegetables-fresh-as-well-as-helping-you-sleep/" target="_blank" rel="noreferrer noopener">Melatonin</a>, the hormone responsible for sleep regulation and the body’s natural sleep-wake cycle, is produced when light signals from the eyes stimulate specific areas of the brain to begin the winding-down process for <a href="https://www.earth.com/news/how-sleep-patterns-affect-your-health-over-time/" target="_blank" rel="noreferrer noopener">sleep</a>.



This hormone plays a critical role in helping the body adjust to darkness, promoting relaxation, and ensuring restful sleep.



People spending more time under artificial light, especially in the evening, often experience delayed melatonin production, which can disrupt their sleep patterns and overall well-being. 



Prolonged exposure to artificial lighting can also interfere with the body’s ability to properly align with natural day-night cycles, contributing to sleep disturbances and fatigue.



To address this issue, the research team conducted a study comparing different types of artificial lights to measure their impact on melatonin production and their effectiveness in resetting circadian rhythms.



<h2 class="wp-block-heading" id="h-a-revolutionary-approach-to-lighting">A revolutionary approach to lighting</h2>



Unlike other commercial products that emphasize blue light to trigger melanopsin, this new LED light emits alternating blue and orange wavelengths, which stimulate a different circuit in the retina. 



“The light we developed does not involve the melanopsin photopigment. It stimulates a blue-yellow opponent circuit that operates through cone photoreceptors in the retina," explained Professor Neitz.



In an experiment, participants were exposed to three different light devices. The alternating blue-orange LED led to the most significant shift in melatonin production, advancing it by 1 hour and 20 minutes, compared to just 40 minutes for the blue LED and 2.8 minutes for white light.



“Even though our light looks white to the naked eye, we think your brain recognizes the alternating blue and orange wavelengths as the colors in the sky,” said Professor Neitz.



<h2 class="wp-block-heading" id="h-lighting-the-way-forward">Lighting the way forward</h2>



The LED device has now been successfully commercialized through the University of Washington. The product is distributed by TUO, a Chicago-based company. This marks an important step toward bringing this technology to the public.



By harnessing the natural color palette of sunrise and sunset, this innovative lighting solution offers a new approach to resetting circadian rhythms, potentially transforming how we address <a href="https://www.earth.com/news/daylight-saving-time-changes-are-directly-linked-to-sleep-disorders/" target="_blank" rel="noreferrer noopener">sleep disorders</a>, mood regulation, and overall health.



The technology holds the promise of improving well-being for those affected by modern lighting and lifestyle challenges, helping individuals reconnect with the rhythms of the natural world.



The study is published in the journal <a href="https://journals.sagepub.com/doi/10.1177/07487304241262918" target="_blank" rel="noreferrer noopener">Journal of Biological Rhythms</a>.



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Colors of sunset and sunrise reset our circadian rhythms

Circadian rhythms are the natural, internal processes that regulate the sleep-wake cycle and repeat roughly every 24 hours. These rhythms, influenced by environmental cues like light and darkness, play a crucial role in various bodily functions ranging from sleep regulation to hormone release. When these rhythms fall out of sync - due to factors such as artificial lighting, irregular schedules, or travel across time zones - people can experience disruptions in sleep, mood, and overall well-being. Lights reset circadian rhythms New research has revealed that the vibrant...

Mammals in general are not able to digest cellulose, the carbohydrate that is found in the cell walls of plant cells. Even <a href="https://www.earth.com/news/large-herbivores-must-be-restored-to-balance-ecosystems/">herbivores</a>, such as cows, horses and elephants do not produce the enzyme that breaks down cellulose. Instead, mammals (including humans) need gut microbes to carry out this function and enable them to access the nutrients found inside plant cells.&nbsp;



Giant pandas (Ailuropoda melanoleuca) are unusual because they are bears, in the order Carnivora, but their diet consists entirely of bamboo leaves and shoots. Carnivores have short gastrointestinal tracts, geared for digesting animal flesh, and this makes the herbivorous diet of giant pandas even harder to process efficiently. Pandas are thus heavily dependent on the microbes in their guts for breaking down cells in leaves and shoots to make the contents available.



In the wild, pandas feed on fibrous old bamboo leaves for eight months of the year. This diet is poor in nutrients and contains almost no fat. However, during late spring and early summer the bears feed on new shoots that have a higher nutritional value that enables them to gain weight.&nbsp;



Previous research has shown that the gut microbiome of giant pandas changes between the leaf-eating season and the shoot-eating season. However, there has been no research on the effects of these seasonal changes on the body characteristics or physiology of the pandas.&nbsp;



A study published today in the journal&nbsp;<a href="https://www.cell.com/cell-reports/home">Cell Reports</a> addresses this gap in current understanding and finds that shifts in the gut microbes enable pandas to gain weight and store fat when bamboo shoots are available to eat.&nbsp;



“This is the first time we established a causal relationship between a panda’s gut microbiota and its phenotype,” said study first author Guangping Huang from the <a href="https://english.cas.cn/">Chinese Academy of Sciences</a>. “We’ve known these pandas have a different set of gut microbiota during the shoot-eating season for a long time, and it’s very obvious that they are chubbier during this time of the year.”



The team of scientists, led by Fuwen Wei at the CAS Institute of Zoology, has been studying wild giant pandas living in the Qinling Mountains in central China for decades. The team collected fecal samples from eight adult pandas during the leaf-eating season (14 samples) and the shoot-eating season (15 samples). These were assessed for the presence and numbers of different types of gut microbes.&nbsp;



Wei says that these wild pandas have distinctly different populations of gut bacteria in the two seasons. In particular, a significantly higher abundance of a bacterium called&nbsp;Clostridium butyricum&nbsp;is present in the gut during the shoot-eating season compared with during the leaf-eating season. Gas chromatography-mass spectrometry of the short-chain fatty acids in the feces also revealed that the fatty acids butyrate and acetate were present in greater amounts during shoot-eating season.



Although bamboo leaves and shoots contain almost no fat, pandas were able to gain weight and store fat when they preferentially ate shoots. The bacterium C. butyricum produces the fatty acid butyrate as a product of its metabolism in the gut of the pandas, and the scientists were interested in the effects of this fatty acid on panda metabolism.



To investigate whether the change in gut microbiota could affect a panda’s metabolism, the researchers performed a fecal transplant of panda feces, collected in the wild, to the intestinal tracts of germ-free mice. They introduced fecal matter from panda donors during the leaf-eating season into some mice, while other mice received feces collected from pandas during the shoot-eating season. A third group of mice – the control group – received no panda fecal matter.&nbsp; Then they fed the mice for 3 weeks with a bamboo-based diet that simulated what pandas eat. &nbsp;



The experts found that mice transplanted with panda feces collected during shoot-eating season gained significantly more weight and had more fat after 21 days than mice transplanted with feces from leaf-eating season, despite consuming the same amount of food. Further analysis revealed that the fatty acid butyrate, a metabolic product of&nbsp;C. butyricum, could upregulate (enhance) the expression of a gene called&nbsp;Per2, which increases lipid synthesis and storage. Thus, the mice showed the same patterns of seasonal weight gain as the pandas do, indicating the critical role of the gut microbiome in panda metabolism.



Fat storage is important in many animals that eat a nutrient-poor diet. The bamboo eaten by pandas in the wild is deficient in fat but the shoots, eaten in late spring and early summer, contain higher levels of protein and carbohydrate. The gut bacteria in these mammals enables them to use the protein and additional carbohydrates in the shoots, to synthesize lipids that are then available for storage.&nbsp;



Many animals experience a seasonal shift in gut bacteria as a result of changes in food availability. For example, certain species of monkeys have different gut microbiota in summer, when they eat fresh leaves and fruits, compared with that in winter, when they feed on leaves and tree bark. A similar shift has also been observed in the digestive systems of Hadza people, modern hunter-gatherers living in Tanzania, as the type of available food changes through the year.



The researchers plan to investigate and map out more microorganisms in the panda’s gut in future, and to find out how they affect the animals’ health. “Causal research of host phenotype and gut microbiota in wild animals is just beginning. Identifying what bacteria are beneficial for animals is very important, because one day we may be able to treat some diseases with probiotics,” said Huang.



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

Giant pandas’ gut bacteria turn nutrient-poor food into fat

Mammals in general are not able to digest cellulose, the...

The turning blades on wind turbines and drones make a <a href="https://www.earth.com/news/traffic-noise-linked-to-higher-risk-of-dementia/">noise</a>, as do the airfoils used on planes and helicopters. Most of the nose that arises as an object moves through air originates at the trailing edge as air flowing over and under the object meet. The same is true for the noise that a bird’s wings make as it flies overhead – except, of course, in the case of owls. They are renowned for being able to fly silently.



In&nbsp;a quest to design airfoils that produce less noise pollution, researchers from <a href="http://en.xjtu.edu.cn/">Xi'an Jiaotong University</a> mimicked the characteristics of owl wings to inform a new design of airfoil that significantly reduces the trailing-edge noise. Details of the study are published today in the journal <a href="https://aip.scitation.org/journal/phf">Physics of Fluids</a>.



“Nocturnal owls produce about 18 decibels less noise than other birds at similar flight speeds due to their unique wing configuration,” said study co-author Xiaomin Liu. “Moreover, when the owl catches prey, the shape of the wings is also constantly changing, so the study of the wing edge configuration during owl flight is of great significance.”



When air flows over the top of an airfoil-shaped surface, it forms a layer of turbulence. Similarly, air flowing underneath also forms a layer of turbulence, and these two layers meet at the trailing edge of the structure. When they meet and air flows back through the trailing edge, it scatters and radiates noise.&nbsp;



The wing feathers of owls form a serrated edge at the trailing end of the wing, and this is thought to minimize turbulence and the associated noise. Previous studies have explored the use of serrated trailing edges and found that the serrations effectively reduce the noise of rotating airfoils. However, the noise reduction was not universal, depending heavily on the way in which the airfoil was used.



“At present, the blade design of rotating turbomachinery has gradually matured, but the noise reduction technology is still at a bottleneck,” said Liu. “The noise reduction capabilities of conventional sawtooth structures are limited, and some new non-smooth trailing-edge structures need to be proposed and developed to further tap the potential of bionic noise reduction."



The researchers used noise calculation and analysis software to conduct a series of detailed theoretical studies of simplified airfoils that had characteristics reminiscent of owl wings. They applied their findings to suppress the noise of rotating machinery.



The study showed that improving flow conditions around the trailing edge of the airfoil and optimizing the shape of the edge did suppress the noise. The experts also found that asymmetrical serrations reduced the noise more than symmetrical serrations.&nbsp;



However, the extent of noise reduction varied with different operating conditions, so the scientists emphasized that the airfoil designs should be further evaluated based on the specific application for which they would be used.



For example, wind turbines have complex incoming flow environments that require a more general noise reduction technology. Examining noise reduction techniques under the influence of different incoming flows would make their conclusions more universal.



The researchers believe their work will serve as an important guide for airfoil design and noise control in the future.



---



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

Owl wings inspire noise reduction in wind turbines and aircraft

The turning blades on wind turbines and drones make a...

Scientists estimate that 19 million people in the United States live in so-called “food deserts” – places with low access to <a href="https://www.earth.com/news/children-should-eat-the-same-healthy-foods-as-adults/">healthy</a> and nutritious food. In addition, more than 32 million people live below the poverty line, and are forced to buy the cheapest available food, regardless if it is less healthy than other options available in their proximity. 



However, the complex ways in which diet and health are influenced by individual and community characteristics - such as education and food access - are still not fully understood.&nbsp;



An interdisciplinary team of researchers led by the <a href="https://www.washington.edu/">University of Washington</a> and <a href="https://www.stanford.edu/">Stanford University</a> has recently completed the largest nationwide study in the United States on the intricate relationship between food environments, demographics, and dietary health.&nbsp;



Using the <a href="https://www.myfitnesspal.com/">MyFitnessPal</a> app, a popular smartphone-based food journaling application, the scientists collected a vast amount of data, spanning over five years.&nbsp;



"Our findings indicate that higher access to grocery stores, lower access to fast food, higher income and college education are independently associated with higher consumption of fresh fruits and vegetables, lower consumption of fast food and soda, and less likelihood of being classified as overweight or obese," reported study lead author Tim Althoff, an assistant professor of Computer Science at the University of Washington.



According to Professor Althoff and his colleagues, previous understanding of the relationship between environment, socioeconomic factors, and diet has been challenged by small sample sizes, single locations, and non-uniform design across studies. By contrast, this new study analyzed data from over 1.1 million users, spanning 2.3 billion food entries, and encompassing more than 9,800 U.S. zip codes.



Scientists discovered that higher educational attainment was the greatest positive predictor of a healthier diet and body mass index (BMI). However, high family income was associated with a marginally higher percentage of people with a BMI verging towards obesity, regardless of their educational status.



As the researchers stress though, these broad, population-level results fail to do full justice to the complexity of individual and community differences. "When we dug into the data further, we discovered that the population-level results masked significant differences in how the food environment and socioeconomic factors corresponded with dietary health across subpopulations," said study co-author&nbsp;Hamed Nilforoshan, a doctoral student in Computational Social Science at Stanford.



Further research is needed to assess whether population-level findings can be applied to smaller communities. “While policies aimed at improving food access, economic opportunity and education can and do support healthy eating, our findings strongly suggest that we need to tailor interventions to communities rather than pursuing a one-size-fits-all approach," concluded study co-author Jenna Hua, a former postdoctoral fellow at Stanford.&nbsp;



The study is published in the journal <a href="https://dx.doi.org/10.1038/s41467-021-27522-y">Nature Communications</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

Healthy diets linked to education and food access

Scientists estimate that 19 million people in the United States...

Many birds learn their songs in the same way that humans learn a language or dialect –from their parents and neighbors, through mimicry. According to most biologists, this is an uncertain and error-prone method, often resulting in slow but unmistakable changes in the nature of <a href="https://www.earth.com/news/humpback-whale-songs-are-used-to-locate-not-attract-other-whales/">songs</a> over the years.



However, new research led by the <a href="https://www.berkeley.edu/">University of California, Berkeley</a> has found that some isolated populations of double-collared East African sunbirds have been singing the same songs - passed down to each new generation - for up to a million years.&nbsp;



The amazingly static nature of their songs may be due to the birds’ unchanging environment. The birds have inhabited so-called sky islands on East African mountaintops since ancient times.



"If you isolate humans, their dialects quite often change; you can tell after a while where somebody comes from. And song has been interpreted in that same way," said study senior author Rauri Bowie, a professor of Integrative Biology at UC Berkeley. "What our paper shows is that it's not necessarily the case for birds. Even in traits that should be very labile, such as song or plumage, you can have long periods of stasis."



According to Professor Bowie and his colleagues, the idea that birdsong changes very often likely arose from studies of Northern Hemisphere birds, which have repeatedly encountered environmental changes, such as glaciers coming and going over the last thousands of years. These changing environmental conditions can cause significant modifications in plumage, song, and mating strategies.



However, since mountaintop environments in the tropics, particularly in East Africa (such as Mount Kenya or Kilimanjaro) have witnessed very little geological change over the millennia, the birds living there faced no evolutionary pressure to change their plumage or songs.



"We are showing, using a really nice setup where we could look at song evolution using naturally isolated populations, that [in East African sunbirds] you don't see this gradual change through cultural or genetic drift at all," Bowie said. "You see these sharp bursts of change in a trait such a birdsong and lots and lots of evidence for stasis, even when that trait should be very plastic. To me, that was a really fascinating result."



The study is published in the journal <a href="https://royalsocietypublishing.org/doi/10.1098/rspb.2021.2062">Proceedings of the Royal Society B</a>.



---



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

The song of the East African sunbird may be a million years old

Many birds learn their songs in the same way that...

A new study published in the journal <a href="https://pubs.acs.org/doi/10.1021/acs.est.1c04158">Environmental Science &amp; Technology</a> has recently assessed the stability of the Earth system based on the impact of the cocktail of synthetic chemicals and other “novel entities” flooding the environment. The experts warn that humanity has exceeded a <a href="https://www.stockholmresilience.org/research/planetary-boundaries/the-nine-planetary-boundaries.html">planetary boundary</a> related to environmental pollutants, placing the Earth and all of its species at risk.



There are over 350,000 different types of human-made chemicals on the global market, including <a href="https://www.earth.com/news/seabirds-are-damaging-their-health-by-eating-plastic/">plastics</a>, industrial chemicals, pesticides, and pharmaceuticals. The total mass of plastics on the planet is now more than twice the mass of all living mammals, and over 80 percent of all plastics ever produced are still present in the environment.&nbsp;



Since plastics contain roughly 10,000 different chemicals, their environmental degradation creates new and dangerous combinations of materials and, thus, unprecedented environmental hazards. Additionally, significant amounts of other novel entities continuously enter the environment, endangering our planet and its various ecosystems.&nbsp;



“There has been a 50-fold increase in the production of chemicals since 1950. This is projected to triple again by 2050,” said study co-author Patricia Villarubia-Gómez, a doctoral candidate in Sustainability Science at the <a href="https://www.stockholmresilience.org/">Stockholm Resilience Center</a>. “The pace that societies are producing and releasing new chemicals and other novel entities into the environment is not consistent with staying within a safe operating space for humanity.”



“Some of these pollutants can be found globally, from the Arctic to Antarctica, and can be extremely persistent.&nbsp;We have overwhelming evidence of negative impacts on Earth systems, including biodiversity and biogeochemical cycles,” added study co-author Bethanie Carney Almroth, an associate professor of Ecotoxicology at the <a href="https://www.gu.se/en">University of Gothenburg</a>.&nbsp;



“The rate at which these pollutants are appearing in the environment far exceeds the capacity of governments to assess global and regional risks, let alone control any potential problems.”



According to the scientists, these environmental pollutants negatively impact our planet in multiple ways, deteriorating the climate and fresh water sources, helping the spread of invasive species, and increasing the <a href="https://www.earth.com/news/antibiotic-resistance-could-reach-catastrophic-levels/">antibiotic resistance</a> of various microbes.&nbsp;



“We need to be working towards implementing a fixed cap on chemical production and release,” advised Professor Carney Almroth.&nbsp;“And shifting to a circular economy is really important,” added Villarubia Gómez. “That means changing materials and products so they can be reused not wasted, designing chemicals and products for recycling, and much better screening of chemicals for their safety and sustainability along their whole impact pathway in the Earth system.”



---



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

Safe planetary boundary for pollutants has been exceeded

A new study published in the journal Environmental Science &amp;...

The Atlantic Forest of Brazil, Argentina and Paraguay is quite threatened, so it’s no surprise that lowland tapirs in this <a href="https://www.earth.com/news/deforestation-exposes-coastal-cities-to-more-deadly-storms/">forest</a> are severely endangered as well. Although tapirs are adaptable and found in a wide variety of habitats across South America, they are still declining in numbers across their range. Lowland tapirs are now found in only 1.78 percent of their original range in the Atlantic Forest.&nbsp;



A new study published in the journal <a href="https://neotropical.pensoft.net/">Neotropical Biology and Conservation</a> warns of the dire need for conservation actions to protect lowland tapirs of the Atlantic Forest. The research was headed up by Dr. Kevin Flesher of Biodiversity Study Center, Michelin Ecological Reserve and Dr. Patrícia Medici of the <a href="https://tapirconservation.org.br/">Lowland Tapir Conservation Initiative</a>.



"Of the 48 tapir populations identified during the study, between 31.3% and 68.8% are demographically unviable (low number of individuals), and between 70.8% and 93.8% of the populations are genetically unviable (low gene flow). Only 3-14 populations are still viable in the long run when both criteria are considered. The evidence suggests that with the appropriate conservation actions, the lowland tapir could be broadly distributed throughout the Atlantic Forest," explained Dr. Flesher.&nbsp;



"Tapirs have low reproductive potential, including a long reproductive cycle with the birth of just one young after a gestation period of 13-14 months and intervals of up to three years between births. Our populational simulations clearly show how, in the case of small populations, even the loss of a single individual per year can result in rapid extinction of an entire local population," added Dr. Medici.&nbsp;



Dr. Flesher spent 15 years visiting 93 reserves in the Atlantic Forest, conducting interviews and analyzing 217 data sets to create a conservation plan for tapirs in the area. Unfortunately, tapirs in the states of São Paulo and Paraná in Brazil - where the largest number of populations remain - are isolated from each other.



"As far as our knowledge goes, there is no evidence of movement of tapirs between these populations," said Dr. Medici.&nbsp;



The fragmented populations aren’t connecting with each other, not because of great distances but the threat from cars involved. "The central problem is the multiple threats they face while crossing the habitat," said Dr. Flesher.&nbsp;



Highways and attendant motor traffic are a huge obstacle and threat to disbursing tapirs. "For example, the heavy traffic on highway BR-101 (which cuts the Brazilian Atlantic Forest from North to South) is a death trap to wildlife. Tapirs often die when attempting to cross it," explained Dr. Medici.&nbsp;



Highway traffic is a significant cause of death for tapirs in six out of eight reservations where highways cross tapir populations. However, the situation seems to call for a small amount of optimism. "Despite these continuing challenges for tapir conservation, most populations appear to be stable or increasing and the conservation outlook for the species is better than several decades ago, when the first efforts to protect the species began," said Dr. Flesher.



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

Lowland tapirs in the Atlantic Forest are at risk of extinction

The Atlantic Forest of Brazil, Argentina and Paraguay is quite...

In collaboration with citizen scientists, an astronomer at <a href="https://www.ucr.edu/">UC Riverside</a> has identified a giant gas planet that was basically hidden in plain sight. The research, which was presented at the American Astronomical Society virtual press event, describes the discovery of TOI-2180 b, a Jupiter-sized planet located about 379 light-years away from Earth.



"TOI-2180 b is such an exciting planet to have found," said study lead author and UCR planetary astronomer Paul Dalba. "It hits the trifecta of 1) having a several-hundred-day orbit, 2) being relatively close to Earth (379 lightyears is considered close for an exoplanet), and 3) us being able to see it transit in front of its star. It is very rare for astronomers to discover a planet that checks all three of these boxes."



According to Dalba, the new planet is special because it takes 261 days to complete a journey around its star, a relatively long time compared to many known gas giants outside our solar system. The planet should be easy for experts to study in further detail due to its relative proximity to Earth and the brightness of the star it orbits.



NASA's TESS satellite is designed to observe one particular section of the sky for a month, before moving on. The goal is to identify <a href="https://www.earth.com/news/astronomers-discover-366-new-exoplanets/">exoplanets</a>, which orbit stars other than the Sun.&nbsp;



"The rule of thumb is that we need to see three 'dips' or transits before we believe we've found a planet," said Dalba. He explained that a single transit event could be caused by a telescope with a jitter, or a star masquerading as a planet.&nbsp;



Former U.S. naval officer Tom Jacobs is a participant in Planet Hunters, a NASA-funded citizen science project run through the online platform Zooniverse.



While examining data collected by TESS, Jacobs and his teammates saw light from the TOI-2180 star dim, just once, and then alerted Dalba.



Using the Automated Planet Finder Telescope at the <a href="https://www.lickobservatory.org/">Lick Observatory</a>, Dalba managed to observe the planet's gravitational tug on the star. This allows him and his colleagues to calculate the mass of TOI-2180 b.



Based on a campaign conducted in August 2021 (which involved about 20,000 images), the researchers estimate that TESS will see TOI-2180 b transit its star again in February, when they are planning a follow up study.&nbsp;



In a press release from NASA, Dalba said that discovering TOI-2180 b was "a great group effort demonstrating that professional astronomers and seasoned citizen scientists can successfully work together."



The study is published in <a href="https://iopscience.iop.org/journal/1538-3881">The Astronomical Journal</a>.



---



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

Citizen scientists have discovered a giant gas planet

In collaboration with citizen scientists, an astronomer at UC Riverside...

Accidentally trapping marine animals such as sharks, seabirds, turtles, or sea mammals in fishing gear is one of the biggest barriers for making fisheries more sustainable. While <a href="https://marineprotectedareas.noaa.gov/">marine protected areas</a> are aiming to minimize accidental catch, they often prove to be quite inefficient in protecting marine biodiversity, particularly in the case of marine species that are very mobile and constantly travel between these static areas.&nbsp;



According to new research from the <a href="http://www.washington.edu/">University of Washington</a> (UW), “dynamic ocean management,” or the shifting of ocean closures, can be much more effective against accidental catch.



“We hope this study will add to the growing movement away from permanently closed areas to encourage more dynamic ocean management,” said study senior author&nbsp;Ray Hilborn, a professor at the UW <a href="https://fish.uw.edu/">School of Aquatic and Fishery Sciences</a>. “Also, by showing the relative ineffectiveness of static areas, we hope it will make conservation advocates aware that permanent closed areas are much less effective in reducing accidental catch than changes in fishing methods.”



Professor Hilborn and his colleagues investigated 15 fisheries around the world, and modelled what would happen both to targeted fish and accidental catches (or “bycatch”) if 30 percent of the fishing grounds were permanently closed, compared with dynamic management. They found that restricting fishing by 30 percent would only diminish bycatch by 16 percent, in contrast to using dynamic closures, which could reduce accidental catch by a staggering 57 percent.



“We found we can significantly reduce bycatch without decreasing the catch of target species by closing small fishing areas that can move year to year,” said study lead author&nbsp;Maite Pons, who completed this article as a UW postdoctoral fellow. “This dynamic approach is increasingly valuable as climate change drives species and fisheries into new habitats, altering these interactions.”



However, the authors acknowledge that, in some cases, static protected areas may remain the best choice. If the main purpose is to protect a critical habitat, a biodiversity hotspot, or a critical feature, static closures might remain most effective and easier to implement. Thus, all conservation goals should be broadly considered before determining which types of ocean protections are best in a specific situation.



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

Dynamic ocean closures offer protection from accidental catch

Accidentally trapping marine animals such as sharks, seabirds, turtles, or...

Go to any natural history museum, watch any dinosaur movie, and undoubtedly the big bad will be a <a href="https://www.earth.com/news/flesh-eating-theropods-were-extremely-fast/">theropod</a>. This terrifying, exceptionally toothy group includes Tyrannosaurus, Velociraptor, Allosaurus, and many others. Paleontologists are finally unraveling how the murderous jaws of these predatory dinosaurs evolved.



A new study, published in the journal <a href="https://www.cell.com/current-biology/home">Current Biology</a> looked at the lower jaws of over 40 theropod dinosaur species. While the most well-known theropods are big and toothy, they also came in many shapes and sizes. Some were small, and some were, in fact, toothless.&nbsp;



By running the different jaws through computer modeling to test their strength, the researchers found that over the course of their evolution, theropod jaws grew progressively stronger. The predatory dinosaurs expanded the rear, or posterior, portion of their jaws (sideways or laterally), and the mechanical strength increased over the course of their over 100-million year history.&nbsp;



“Although theropod dinosaurs are always depicted as fearsome predators in popular culture, they are in fact very diverse in terms of diets. It is interesting to observe the jaws becoming structurally stronger over time, in both carnivores and herbivores. This gives them the capacity to exploit a wider range of food items," explained study lead author Dr. Fion Waisum Ma of the <a href="https://www.birmingham.ac.uk/index.aspx">University of Birmingham</a>.



"Theropod dinosaurs underwent extreme dietary changes during their evolutionary history of 165 million years. They started off as carnivores, later on evolved into more specialized carnivores, omnivores and herbivores. Studying how their feeding mechanics changed is key to understanding the dietary transitions in other vertebrate animals too.”



While it makes sense that the hypercarnivorous meat-eaters would increase their lower-jaw strength, the herbivorous lineages also developed stronger jaws.&nbsp;



“It is fascinating to see how theropod dinosaurs had evolved different strategies to increase jaw stability depending on their diet," said study co-author Dr. Stephan Lautenschlager. "This was achieved through bone remodeling – a mechanism where bone is deposited in regions of the jaw that experience high stresses during feeding.”&nbsp;



This evolutionary pattern is reflected in the ontogeny, or growth, of the individual animals. For example, juvenile tyrannosaurs possessed proportionally slimmer and downturned jaws compared to adult individuals.&nbsp;



“The similarity between jaw strengthening through growth and through time suggests that developmental patterns in juvenile dinosaurs ultimately affected the evolution of the whole group," concluded Dr. Lautenschlager&nbsp; "This likely facilitated the jaw evolution of theropod dinosaurs and their overall success for over 150 million years.”



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By <a href="http://mailto:rugerpaleo@gmail.com">Alex Ruger</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Jaws of predatory dinosaurs grew stronger as they evolved

Go to any natural history museum, watch any dinosaur movie,...

A new study published in the journal <a href="https://dx.doi.org/10.1038/s41562-021-01254-x">Nature Human Behavior</a> has found that playing a recently developed action video game can help children significantly improve their reading skills. Since reading requires skills such as <a href="https://www.earth.com/news/exercise-can-reduce-or-prevent-vision-loss/">vision</a>, attention, working memory, and cognitive flexibility, a research team led by Angela Pasqualotto, a postdoctoral fellow in Psychology at the <a href="https://www.unige.ch/en/">University of Geneva</a>, created a video game aiming to help children develop these capacities.



“The universe of this game is an alternative world in which the child, accompanied by his Raku, a flying creature, must carry out different missions to save planets and progress in the game,” explained Dr. Pasqualotto. &nbsp;“For example, the Raku flies through a meteor shower, moving around to avoid those or aiming at them to weaken their impact, while collecting useful resources for the rest of the game, a bit like what you find in action video games.”&nbsp;



Dr. Pasqualotto and her colleagues enrolled 150 Italian schoolchildren aged between 8 and 12, and divided them into two groups: one group played the action game developed by the team, and the other played <a href="https://scratch.mit.edu/">Scratch</a>, a non-action game which teaches kids how to code, and also requires planning, reasoning, and problem-solving abilities.



After initially testing the children’s reading levels as well as their attentional control, the researchers asked them to play the games for six weeks (two hours per week) under supervision at school. After the end of this period, children’s reading capacities were tested again.



“We found a 7-fold improvement in attentional control in the children who played the action video game compared to the control group,” said Dr. Pasqualotto. “What is particularly interesting about this study is that we carried out three further assessment tests at 6 months, 12 months, and 18 months after training. On each occasion, the trained children performed better than the control group, which proves that these improvements were sustained.”



Moreover, the scientists observed clear improvements not only in reading speed, but also in reading accuracy, together with longer-term increases in the children’s overall school grades. &nbsp;“The effects are thus long-term, in line with the action video game strengthening the ability to learn how to learn,” said study co-author Daphne Bavelier, a professor of Psychology at the University of Geneva.



Researchers are now trying to adapt the videogame in German, English, and French to investigate whether its benefits on reading acquisition can extend to non-phonetic languages too, in which not all letters are pronounced, and thus require further abilities such as a greater reliance on memorization.&nbsp;



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

Playing action video games can improve reading skills

A new study published in the journal Nature Human Behavior...

We live in a diverse world with different ecosystems and <a href="https://www.earth.com/news/shrinking-habitats-alien-species-threaten-native-trout/">habitats</a>. For centuries, scientists have been studying how flora and fauna interact within these natural communities. Some animals are creatures of habit who frequently eat in the same spots, travel on the same roads, and raise their young in the same places. The term "site fidelity" is used by ecologists to characterize the behavior of animals who are fixed in their routines and tend to return to a previously occupied location. 



The habit of many animals, from fish to birds to mammals and insects, to return to regularly frequented areas. Site fidelity is everywhere in nature, whether it's salmon returning to their native streams to breed or birds returning year after year to the same nest site.



According to a new study, while this "consistent" behavior may be beneficial when environmental conditions aren't changing rapidly, the benefits may not be realized in the ever-changing world dominated by humans. The research was focused on a literature review led by the <a href="http://www.uwyo.edu/">University of Wyoming</a>.



When animals get familiar with a location, site fidelity can help them figure out where to obtain good food or safe havens from predators, as well as how to get to and from these resources quickly. On the other hand, the research team discovered a new trend in the scientific literature.



“Animals that have strong site fidelity are having a tough time adjusting to the novel landscapes that are showing up around them as a result of humans,” said study co-lead author Professor Jerod Merkle.



The researchers pointed out that animals with strong site fidelity may not survive or reproduce as well as animals with more flexible behaviors when faced with human disturbances or climate change. When a population consists of a large number of site loyalists, a population decrease might occur due to the changes in the environment.



For instance, there are numerous mule deer winter ranges in Wyoming. With the addition of large natural gas fields, mule deer can make slight range adjustments to avoid infrastructure, but they stick to the same general area rather than abandoning it completely. The continued use of those damaged places may have detrimental implications. In one long-term study, researchers discovered a 40% drop in the mule deer population following large-scale energy development in their winter area.



Climate change also plays a major role in the adverse impacts on site-fidel animals. Under normal climate circumstances, site fidelity is a winning strategy for female northern elephant seals in the Pacific Ocean. In average years, site-faithful seals are better able to acquire food and gain fat compared to their more flexible cousins. But when aberrant climate events - such as extreme El Nios - induce major changes in the ocean ecology, behaviorally flexible seals win out. Female seals with strong site fidelity are unable to gain as much vital fat as they require to reproduce.



“Despite each of us working on very different species from one another, our group came together because we all recognized that there was a clear connection between strong site fidelity and species declines," said study co-lead author Briana Abrahms, an assistant professor at the University of Washington.



"We all thought it was important to call attention to this connection for other researchers and wildlife managers. Recognizing the types of species or behaviors that may suffer most from human-induced environmental change can help develop conservation priorities and actions."



While the analysis paints a bleak picture of the future for animals with high site fidelity, they also offer hope. The experts noted that occasionally, an animal will try something new and succeed. While such instances are uncommon, those "innovators" can be critical to a company's long-term survival in a changing environment.



"While these species appear to be stuck in their ways, many of them also have some unique but subtle ways of dealing with change,” said study co-author Jonathan Armstrong, an assistant professor at Oregon State University. “We just have to be patient and make sure populations don’t crash before such innovators come along,” Armstrong added.



The researchers offer a number of recommendations for researchers and practitioners towards the end of their paper. To begin, long-term monitoring is essential for determining how individuals and populations react to change. Second, they argue that biologists should not always expect animals to use and discover the optimal habitats. This is especially crucial when it comes to restoring new habitat regions, which may not work well for species with high site fidelity because they may not be able to "discover" these regenerated habitats.



As a result, the study authors propose that, rather than off-site mitigation, the conservation of species with high site fidelity should focus on the protection and restoration of highly frequented locations.



The study is published in the journal <a href="https://www.esa.org/frontiers-in-ecology-and-the-environment/">Frontiers in Ecology and the Environment</a>.



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By <a href="http://mailto:ashikha92@gmail.com">Ashikha Raoof</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Animals with strong site fidelity face an uncertain future

We live in a diverse world with different ecosystems and...

A new study led by the <a href="https://www.ku.dk/english/">University of Copenhagen</a> has investigated how different health-promoting signaling <a href="https://www.earth.com/news/origins-life-simple-molecules/">molecules</a> produced by various organs of our bodies following physical exercise are influenced by the time of the day when exercise is performed. Understanding the relationship between circadian rhythms and exercise can have broad impacts on our health, helping us improve our sleep, memory, and metabolic homeostasis.



Most of our cells regulate their biological processes over a 24-hour period, operating in so-called “circadian rhythms.” Thus, the sensitivity of different bodily tissues to the effects of exercise depends on the time of day when exercise is performed. In order to better understand this complex connection, the researchers carried out experiments on mice that exercised either in the early morning or late evening.&nbsp;



Using mass spectrometry to analyze blood samples and tissues from the specimen’s heart, liver, brain, muscle, or fat, the scientists detected hundreds of metabolites and signaling molecules in each type of tissue, and monitored how they were changed by exercising at different times of the day. This resulted in an “Atlas of Exercise Metabolism,” a complex and comprehensive map of exercise-induced molecules found in different tissues following exercise at different times of day.



“A better understanding of how exercise affects the body at different times of day might help us to maximize the benefits of exercise for people at risk of disease, such as obesity and type 2 diabetes,” said study co-author Juleen R. Zierath, an expert in Circadian Biology at the University of Copenhagen.



“Not only do we show how different tissues respond to exercise at different times of the day, we also propose how these responses are connected to induce an orchestrated adaptation that controls systemic energy homeostasis,” added study co-author Jonas Thue Treebak, an associate professor specializing in molecular metabolism at the same university.



This research sheds new light on how tissues communicate with one another, and how exercise can help “realign” in particular tissues faulty circadian rhythms that have previously been linked to increased risks of metabolic diseases, such as obesity or type 2 diabetes. Further research is needed to understand how newly identified exercise-induced signaling molecules in multiple bodily tissues individually or collectively affect health.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/pii/S1550413121006355?via%3Dihub#sec2">Cell Metabolism</a>.&nbsp;



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

How exercise affects the body at different times of day

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

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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

[sendtonews key="G9bUoxcjr4-2511624-12187" 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 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

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

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



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



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



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



Video Credit: ESA&nbsp;



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



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

The city of Dublin on Ireland's east coast

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



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



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



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



Video/ Image Credit: ESA



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



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

The province of Zaragoza in northeast Spain

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



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



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



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



Video Credit: NASA Goddard



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



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

Wetlands are a major source of methane emissions

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



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



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



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



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



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



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



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



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



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



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

The rapid retreat of the Columbia Glacier

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



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



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



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



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



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



Video &amp; Image Credit: ESA



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



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

The Pyrenees Mountains in southwest Europe

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



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



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



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



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



Video Credit: Stowers Institute for Medical Research&nbsp;



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



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

How the immune system responds to injury

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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

2022 illustrated the consequences of a warming climate

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Earth,Like,Exoplanet,3d,Render

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



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



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



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



Video Credit: NASA Goddard



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



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



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

Two distant planets may be "water worlds"

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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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...