<p>NatureServe Explorer Species Reports &#8212; NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.</p>
<p>ITIS Reports &#8212; ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.</p>
<p>FWS Digital Media Library &#8212; The U.S. Fish and Wildlife Service&#8217;s National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.</p>


Euphyllia paradivisa

<p>Ever wondered how the giants of the sea perceive the world around them? How do creatures like whales react to the symphony of sounds in their aquatic realm? </p>



<p>Well, an international team of marine biologists has rolled up its sleeves to find answers to these intriguing questions. </p>



<p>In a pioneering study that's making waves, marine biologists from Norway, the U.S., and Denmark conducted the first-ever hearing test on live baleen whales.</p>



<p>The researchers' motivation? An acute concern about the increasing noise pollution in our oceans and its impact on the <a href="https://www.earth.com/news/ai-helps-humans-have-20-minute-conversation-with-humpback-whale-named-twain/" target="_blank" rel="noreferrer noopener">sea-dwelling fauna</a>.</p>



<h2 class="wp-block-heading" id="h-whales-reacting-to-different-sounds">Whales reacting to different sounds</h2>



<p>The research team leading this innovative study devised a novel method to test the hearing abilities of two wild baleen whales by recording their brain waves.</p>



<p>They selected minke whales (<em>Balaenoptera acutorostrata</em>) as the first test subjects due to their relative compactness compared to other whales. The scientists charted their <a href="https://www.earth.com/news/ship-routes-overlap-with-92-of-whale-habitats/" target="_blank" rel="noreferrer noopener">swimming routes</a> through a slim channel nestled between two islands off Norway's coast.</p>



<p>The team set up netted barriers near the area, which guided the whales into a small holding pen. Upon successful capture, the researchers - with a swift pull of the net placed beneath the whales - brought the giants to the surface.</p>



<p>The scientists attached gold-plated electrodes onto their skin. These electrodes recorded the whales' brain waves in response to different sounds played out from nearby speakers.</p>



<h2 class="wp-block-heading" id="h-series-of-unprecedented-discoveries">Series of unprecedented discoveries</h2>



<p>This unusual procedure marked the first such successful examination of its kind ever attempted.</p>



<p>It was assumed that the whales would respond to low-frequency sounds, based on prior research that studied the ear structure of deceased whales. As anticipated, the whales did respond to these sounds, but the scientists found that the whales also heard sounds of much higher frequencies too.  </p>



<p>They responded to sounds in the 45 to 90 kHz range as well, which is well above the frequency of the sounds they make themselves. </p>



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



<p>This revelation implies that marine scientists worldwide might need to revisit earlier work that aimed to understand how <a href="https://www.earth.com/news/blue-whales-continue-their-battle-for-survival/" target="_blank" rel="noreferrer noopener">whales</a> react to sonar, underwater echo sounders, and other noises from seafaring vessels.</p>



<p>It could also spark new research avenues on how baleen whales shield themselves from their natural predators, the killer whales.</p>



<p>The findings from this study have far-reaching implications for conservation strategies targeting marine life, particularly baleen whales. </p>



<h2 class="wp-block-heading" id="h-impacts-of-noise-pollution">Impacts of noise pollution</h2>



<p>Understanding that whales can hear a broader range of frequencies, including ultrasonic sounds, suggests that they may be more vulnerable to anthropogenic noise than previously assumed. </p>



<p>This revelation necessitates a recalibration of environmental policies and protective measures designed to mitigate the impact of ocean noise pollution. </p>



<p>Conservationists can leverage these insights to implement stricter maritime noise regulations and advocate for quieter shipping practices, which could reduce the stress whales experience in increasingly noisy oceans.</p>



<h2 class="wp-block-heading" id="h-future-research-directions">Future research directions</h2>



<p>The pioneering nature of this study from the <a href="https://nmmf.org" target="_blank" rel="noreferrer noopener">National Marine Mammal Foundation</a>, San Diego, opens up numerous possibilities for future research in marine science. Scientists are now challenged to explore how the presence of ultrasonic sounds influences whale behavior and communication.</p>



<p>Additionally, further investigation into the auditory capabilities of different whale species could yield new data on their adaptation mechanisms. Researchers might also consider expanding this method to study other large marine animals that are potentially affected by noise pollution.</p>



<p>Ultimately, these efforts could refine our understanding of marine ecosystems, leading to more effective conservation initiatives and fostering coexistence between human activities and oceanic life.</p>



<h2 class="wp-block-heading" id="h-sounds-from-human-activities">Sounds from human activities </h2>



<p>Research like this, as intriguing as it is, sheds light on how human activities, even those we may perceive as inconsequential "noises," can adversely affect <a href="https://www.earth.com/news/whale-sharks-move-into-dangerous-territory-as-the-climate-warms/" target="_blank" rel="noreferrer noopener">marine life</a>.</p>



<p>It's a sobering reminder of our responsibility as inhabitants of this planet. Indeed, the health of our oceans is a clear reflection of our conduct as its primary custodians.</p>



<p>Who knew a study on the hearing capabilities of whales would prompt such profound contemplation? That's the beauty of science, ever-evolving, constantly surprising. </p>



<p>So, as we marvel at the minke whales' superpower today, who knows, tomorrow might bring about more exciting revelations from the depths of our oceans.</p>



<p>The study is published in the journal <a href="https://www.science.org/doi/10.1126/science.ado7580" target="_blank" rel="noreferrer noopener"><em>Science</em></a>.</p>



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Whales may have ultrasonic hearing as a form of defense

Ever wondered how the giants of the sea perceive the...

<p>Few sights can be as awe-inspiring as New Zealand's legendary "walking tree," a towering ancient giant that stands like a sentinel from a fantasy world.</p>



<p>This extraordinary tree remains unmatched, as though it has stepped right out of the imagination of J.R.R. Tolkien, author of <em>The Lord of the Rings</em>.</p>



<h2 class="wp-block-heading" id="h-champion-of-the-forest">Champion of the forest</h2>



<p>The "walking tree" is no ordinary one. It recently won the title of New Zealand's Tree of the Year with ease, claiming 42% of the public vote and leaving five other finalists behind. The contest was organized by the <a href="https://www.nzarb.org.nz" target="_blank" rel="noreferrer noopener">New Zealand Arboricultural Association</a>.</p>



<p>The tree that seems to be on a stroll is not just unique in its appearance; it carries a rich legacy that stretches back centuries.</p>



<h2 class="wp-block-heading" id="h-journey-of-the-walking-tree">Journey of the walking tree</h2>



<p>The tree - a northern rātā (<em>Metrosideros robusta</em>) - has its roots on the west coast of South Island, near Karamea.</p>



<p>Reaching heights of up to 105 feet (equal to a seven-story building), it exists as a remarkable symbol of nature's ingenuity and endurance. The tree stands by a cemetery, the lone survivor of a <a href="https://www.earth.com/news/worlds-oldest-forest-discovered-close-to-new-york-city/" target="_blank" rel="noreferrer noopener">forest</a> that was cleared about 150 years ago.</p>



<p>Brad Cadwallader, organizer of the Tree of the Year competition, told Radio New Zealand that during the voting, the walking tree "strode out into the lead right from the very start."</p>



<p>"The farming family back then clearly thought it was special because they left it," noted Cadwallader.</p>



<p>This tree has been described as an "exceptional feature" and a "prime example of the remarkable trees that we, as New Zealanders, are fortunate to experience," said NZ Arb president Richie Hill in a statement.</p>



<h2 class="wp-block-heading" id="h-a-tale-of-growth-and-survival">A tale of growth and survival</h2>



<p>Northern rātā trees are <a href="https://www.earth.com/news/epiphytes-are-increasingly-threatened-by-forest-disturbances/" target="_blank" rel="noreferrer noopener">epiphytes</a>, a type of tree that starts growing on the surface of a host tree before growing aerial roots that reach to the ground.</p>



<p>This walking tree likely lived, initially, high up in the canopy of its host, surviving on air and rainwater before it finally grounded itself.</p>



<p>Its unusual root layout is probably due to how it grew around its host tree, which probably died off centuries ago.</p>



<p>“That <a href="https://www.earth.com/search-results/?search=host%20tree&amp;start=0" target="_blank" rel="noreferrer noopener">host tree</a> has now gone," said Cadwallader. "Maybe the tree was either very, very big, or there may have been another tree that fell and lent against the host tree, and that's why the roots have split near the ground and given it that walking appearance.”</p>



<h2 class="wp-block-heading" id="h-plight-of-the-northern-rata">Plight of the northern rātā</h2>



<p>Unfortunately, the majestic northern rātā is under significant threat. Once common in New Zealand's forests, these trees are now listed as nationally vulnerable.</p>



<p>Multiple factors, such as <a href="https://www.earth.com/news/global-deforestation-crisis-how-can-we-stop-massive-forest-losses/" target="_blank" rel="noreferrer noopener">deforestation</a> and the invasive common brushtail possums, which wreak havoc by devouring the leaves and gnawing at the roots, pose significant threats.</p>



<p>The trees face danger from <a href="https://www.earth.com/news/scrub-mint-almost-extinct-lived-earth-millions-years/" target="_blank" rel="noreferrer noopener">hybridization</a> with the closely related pōhutukawa trees. They are also susceptible to myrtle rust, a pathogenic fungus that is native to South America but was detected in New Zealand for the first time in 2017.</p>



<p>As we appreciate the beauty and uniqueness of the "walking tree," it’s crucial to take note of the environmental challenges these giants face. Although the trees are evidence of nature's resilience, they also serve as a stark reminder of our responsibility to protect and preserve them.</p>



<h2 class="wp-block-heading" id="h-cultural-and-ecological-legacy-of-the-walking-tree">Cultural and ecological legacy of the walking tree</h2>



<p>The walking tree is more than just a botanical marvel; it serves as a living emblem of New Zealand's deep connection to its natural world.</p>



<p>For the indigenous Māori people, trees like the northern rātā are taonga, or treasures, woven into cultural myths, rituals, and traditions.</p>



<p>The rātā, with its crimson flowers, is often associated with strength, endurance, and renewal - qualities that are certainly epitomized by this lone survivor near Karamea.</p>



<p>Ecologically, the northern rātā plays a critical role in its environment. Its towering canopy provides shelter and sustenance for native birds like the tūī and kererū, while its roots stabilize the soil and prevent erosion.</p>



<p>The walking tree, standing alone and surrounded by cleared land, reminds us of what has been lost - and what still needs to be preserved.</p>



<p>As New Zealanders rally around this extraordinary tree, it becomes a symbol of hope and a call to action for conservation efforts. </p>



<p>Protecting such iconic species ensures that future generations will not only learn about them in stories but also experience their majesty firsthand.</p>



<p>Image Credit: Gareth Andrews</p>



<p>-----</p>



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New Zealand’s 'walking tree': The final remains of a lost forest

Few sights can be as awe-inspiring as New Zealand's legendary...

<p>Corals act more like us humans than one might think. These aquatic structures host an array of marine life while also depending on their microenvironment to survive and grow. Just like humans take multivitamins to stay healthy, corals rely on essential nutrients to thrive.</p>



<h2 class="wp-block-heading" id="h-multivitamins-for-corals">Multivitamins for corals</h2>



<p>Enter the researchers at the Woods Hole Oceanographic Institution (WHOI). They've been busy in the lab, testing an innovative concept: nutrient-infused tiles aimed at supercharging the immune system of corals. It's like a daily multivitamin, but for corals. </p>



<p>The goal? They aim to prevent coral bleaching, and to help corals to weather the stress of shifting ocean temperatures and to bounce back from harsh climate events such as hurricanes.</p>



<p>"We are studying how corals react when grown on substrates that have been infused with essential metal micronutrients, like manganese, zinc, and iron," explained Colleen Hansel, a senior scientist and marine chemist at <a href="https://www.whoi.edu" target="_blank" rel="noreferrer noopener">WHOI</a>.</p>



<p>There's an urgency to this work, as rapidly warming waters and an active hurricane season make field trials difficult.</p>



<p>However, hope is not lost. Preliminary data harvested from a year’s worth of lab experiments suggests that corals which received a nutrient boost early on were more resilient and resistant to heat stress.</p>



<h2 class="wp-block-heading" id="h-a-reef-brought-to-life">A reef brought to life</h2>



<p>Armed with this data, the team's next plan is to take these nutrient-infused tiles and embed them in an artificial reef. </p>



<p>Designed by experts at the University of the Virgin Islands (<a href="https://www.uvi.edu/index.html" target="_blank" rel="noreferrer noopener">UVI</a>), this 20 sq. meter (216 sq. ft.) concrete setup will offer a safe home to juvenile corals that need multivitamins.</p>



<p>It also doubles as a settling spot for coral larvae, while the nutrient-rich tiles ensure vitamins are dispersed into the surrounding waters. This not only promotes coral growth, but also prepares them for environmental stressors.</p>



<p>"The artificial reef we're building is going in next to a natural reef that has been severely impacted by marine heat waves and extreme storm events," explained Marilyn Brandt, a coral disease ecologist at the UVI.</p>



<p>This man-made marvel won't just fend off storm surges and erosion, it will also create a habitat for corals struggling to adapt to climate change effects. The ultimate goal of the reef's establishment is to help restore the natural reefs in the area.</p>



<h2 class="wp-block-heading" id="h-monitoring-corals-and-multivitamin-tiles">Monitoring corals and multivitamin tiles</h2>



<p>To ensure the ongoing success of this cutting-edge approach, continuous monitoring and adaptation are integral. Scientists plan to deploy advanced monitoring systems that will track <a href="https://www.earth.com/news/great-barrier-reef-is-on-the-brink-of-extinction/" target="_blank" rel="noreferrer noopener">coral health</a> metrics in real-time. </p>



<p>This will include assessments of coral growth rates, color changes indicative of stress, and local water conditions. Such data will allow researchers to alter their strategies promptly, adjusting nutrient concentrations or tile placements as necessary to optimize coral resilience.</p>



<p>A dynamic interplay between technology and ecological understanding will ultimately support these living structures in adapting to ever-changing marine environments.</p>



<h2 class="wp-block-heading" id="h-community-engagement-and-education">Community engagement and education</h2>



<p>Beyond laboratory experiments and scientific endeavors, community engagement plays a pivotal role in coral conservation. Educational initiatives aim to involve local communities and <a href="https://www.earth.com/news/60-percent-global-coral-reefs-face-bleaching-rising-temperatures/" target="_blank" rel="noreferrer noopener">raise awareness</a> about the importance of coral ecosystems. </p>



<p>Workshops, seminars, and hands-on restoration activities promote a sense of stewardship among residents and visitors alike. By incorporating traditional knowledge and local insights, these programs ensure a holistic approach to coral reef preservation.</p>



<p>As communities learn and participate in restoration efforts, they contribute to a sustainable model that may serve as a blueprint for similar conservation projects globally.</p>



<h2 class="wp-block-heading" id="h-balancing-the-ecosystem">Balancing the ecosystem</h2>



<p>Of course, in the grand scheme of the ocean world, balance is key. While the "multivitamin" tiles will help corals, researchers are cautious that they don't end up favoring a specific coral type or promote the intrusion of unwanted species.</p>



<p>As a result, Brandt, Hansel, and their colleagues are keen to examine this while generating a diverse environment beneficial to the reef ecosystem.</p>



<p>"We need to be sure an artificial reef looks and sounds as similar to a natural reef as possible," said Hansel. "That doesn't consist of just coral, but also sponges, anemones, and other biogeochemical components of the reef ecosystem."</p>



<p>Thus, it's evident that these nutrient-infused tiles, created with dedication and an innovative spirit, could provide a vital lifeline for <a href="https://www.earth.com/news/ai-illuminates-fish-interactions-in-coral-reefs/" target="_blank" rel="noreferrer noopener">coral reefs</a> in these changing times.</p>



<p>Could this be the answer to coral resilience? As with much in science, time and rigorous testing will tell. For now, let's look forward to more revealing studies on this exciting development.</p>



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'Multivitamins' could save coral reefs from climate destruction

Corals act more like us humans than one might think....

<p>The next time you clean out your closet and happily donate old clothes to charity, you might want to pause for a moment. A novel study, published in the journal <em>Nature Cities</em>, has brought to light some shocking revelations about the destiny of our donated garments.</p>



<h2 class="wp-block-heading" id="h-unfortunate-fate-of-donated-clothes">Unfortunate fate of donated clothes</h2>



<p>Researchers have been diligently following the trail of donated clothes and textiles across several western cities. </p>



<p>The findings are quite disturbing. In most cities, spanning from Melbourne to Manchester, donated <a href="https://www.earth.com/news/fashion-industrys-plastic-waste-is-a-major-environmental-threat/" target="_blank" rel="noreferrer noopener">textiles</a> are either exported or dumped as waste.</p>



<p>It's alarming to consider that the weight of global textile waste each year is 92 million tonnes, a number that could see a scary doubling by 2030.</p>



<h2 class="wp-block-heading" id="h-crucial-role-of-charity-shops">Crucial role of charity shops</h2>



<p>Charity shops do an admirable job of handling a large volume of used and donated clothes. However, they face a <a href="https://www.earth.com/news/fast-fashion-toll-environment/" target="_blank" rel="noreferrer noopener">complex predicament</a>. </p>



<p>Quite a few of the donations they receive are of poor quality, reducing the financial benefit of managing them locally. So, how do these charities adapt? They trade valuable items and discard or export the remainder.</p>



<p>An interesting case in point is Melbourne, where charities export high-quality, often vintage, second-hand clothes to Europe. This results in the city's independent resale businesses importing similar clothing back from Europe or the United States.</p>



<h2 class="wp-block-heading" id="h-challenges-of-high-volume-and-low-quality">Challenges of high volume and low quality</h2>



<p>Over the past 15 to 20 years, charities and collectors have reported a concerning decrease in the quality of the garments they receive, which negatively impacts their resale potential.</p>



<p>According to Dr. Yassie Samie of <a href="https://www.rmit.edu.au" target="_blank" rel="noreferrer noopener">RMIT University</a> in Melbourne, local governments and charities need a stronger and more efficient collaboration to manage textile waste.</p>



<p>"We're used to charities doing the heavy lifting, but they've been unable to fully handle the volume of donated clothes for a long time now," said Dr. Samie.</p>



<p>"Charities are driven by social welfare values and need to raise funds for their programs. However, their operations are ill-equipped to deal with the volume of used textiles that need to be reused and recycled."</p>



<p>Local government cooperation is essential in this regard, and Samie suggests that charities explore other business models, such as swapping and repair centers.</p>



<h2 class="wp-block-heading" id="h-export-of-donated-clothes">Export of donated clothes</h2>



<p>Overconsumption and oversupply are the main culprits behind the cities' textile waste crisis. These lead to the export of between 33% (Australia) and 97% (Norway) of donated clothes.</p>



<p>It's important to note that most local governments in the cities studied do not get involved in textile waste beyond providing public spaces and licenses for charity bins and commercial resellers. </p>



<p>In fact, in cities like Melbourne, local governments send discarded textiles directly to landfill, instead of diverting them to recycling or reuse facilities, or other employing other, local alternatives.</p>



<h2 class="wp-block-heading" id="h-need-for-systemic-change">Need for systemic change</h2>



<p>Dr. Samie noted that systemic change is vital to address the issue of textile waste. She emphasizes the importance of promoting local <a href="https://www.earth.com/news/eco-friendly-vegan-leather-could-transform-the-fashion-industry/" target="_blank" rel="noreferrer noopener">alternatives</a> to fast fashion, including reselling, swapping, and repairing.</p>



<p>"Sustainable fashion initiatives, like second-hand retailers, struggle to compete with fashion brands' big marketing budgets and convenient locations," said Dr. Samie.</p>



<p>"Fast fashion alternatives exist but they are under-promoted, despite their potential to significantly reduce cities' textile waste."</p>



<h2 class="wp-block-heading" id="h-hidden-cost-of-donated-clothes">Hidden cost of donated clothes</h2>



<p>The exportation of donated clothes presents another layer of complexity in the textile waste conundrum. </p>



<p>While sending garments abroad might appear as a practical solution for local waste management challenges, it offloads the environmental and social costs onto less-regulated markets.</p>



<p>These exported textiles often end up in countries with weak waste management infrastructures, where they can accumulate in landfills, contributing to pollution and resource strain. </p>



<p>Moreover, the influx of cheap, second-hand clothing can undermine local textile industries, impacting the livelihoods of workers who depend on traditional garment production.</p>



<p>Relying on exports as an easy fix not only perpetuates global inequalities but also stalls the necessary advancements in sustainable local solutions.</p>



<h2 class="wp-block-heading" id="h-approaches-to-mitigating-waste">Approaches to mitigating waste</h2>



<p>Transformative approaches to addressing textile waste are beginning to emerge, albeit at varying scales of impact. </p>



<p>Some forward-thinking cities and organizations have started to implement circular economy strategies, focusing on keeping resources in use for as long as possible through upcycling, recycling, and the utilization of biodegradable materials. </p>



<p>Collaborations between fashion brands, municipalities, and environmental organizations have led to the establishment of community repair cafes and textile recycling hubs. These initiatives not only reduce waste but also educate the public on the value of sustainable practices. </p>



<p>A multi-faceted approach incorporating education, policy change, and grassroots involvement is critical for creating lasting change. By promoting a culture of sustainability, cities can turn the tide on textile waste and lead the way towards a more environmentally responsible future.</p>



<h2 class="wp-block-heading" id="h-fashion-advertising-ban">Fashion advertising ban</h2>



<p>The study's authors propose a ban on <a href="https://www.earth.com/news/fast-fashion-carbon-footprint/" target="_blank" rel="noreferrer noopener">fashion</a> advertising in cities to make room for promoting more sustainable alternatives to donating clothes. </p>



<p>Recently, France introduced a ban on advertising ultra-fast fashion. Dr. Samie supports such regulations and would like to collaborate with local governments to find better uses for discarded textiles.</p>



<p>Ultimately, the study sheds light on the urgent need for smarter methods of managing textile waste.</p>



<p>As the global textile waste burden continues to grow, each one of us must take responsibility for our shopping habits and make more sustainable choices. </p>



<p>The study is published in the journal <em><a href="https://www.nature.com/articles/s44284-024-00140-7" target="_blank" rel="noreferrer noopener">Nature Cities</a></em>.</p>



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The dark side of donating clothes to charity

The next time you clean out your closet and happily...

<p>Ever wondered what keeps your skin from turning crispy under the fiery sun? Well it's thanks to urocanic acid, a compound that could replace synthetic sunscreens.</p>



<p>Recently, a team of researchers shed light on this naturally occurring UV-absorbing compound. </p>



<p>Known as "sunscreen's potential game-changer," urocanic acid offers an eco-friendly and health-conscious alternative to synthetic sunscreens.</p>



<h2 class="wp-block-heading" id="h-urocanic-acid-as-sunscreen">Urocanic acid as sunscreen</h2>



<p>The study was led by Professor Wybren Jan Buma of the <a href="https://www.uva.nl/en" target="_blank" rel="noreferrer noopener">University of Amsterdam</a> and Professor Vasilios Stavros of the <a href="https://warwick.ac.uk" target="_blank" rel="noreferrer noopener">University of Warwick</a> in the U.K. </p>



<p>Together with their research teams, they’ve been digging deep into urocanic acid's <a href="https://www.earth.com/news/why-does-skin-become-leathery-after-too-much-uv-light-from-sun-exposure/" target="_blank" rel="noreferrer noopener">capabilities</a>, investigating its possible use as a novel class of sunscreen filters.</p>



<h2 class="wp-block-heading" id="h-properties-of-urocanic-acid">Properties of urocanic acid</h2>



<p>The investigations were focused on the UV-A and UV-B absorbing, or "sun-blocking" properties of urocanic acid and its <a href="https://www.earth.com/news/forever-chemicals-are-easily-absorbed-through-skin/" target="_blank" rel="noreferrer noopener">derivatives</a>.</p>



<p>The experts scrutinized the properties of isolated molecules and solutions, and their findings have been published in two enlightening papers in the journal <em>Physical Chemistry Chemical Physics</em> (PCCP).</p>



<p>"This is an excellent starting point for further optimization of its photoactive properties," said Professor Buma. "We envision many specific applications of urocanic acid and its derivatives, notably in safe UV filters."</p>



<h2 class="wp-block-heading" id="h-need-for-safer-sunscreen-agents">Need for safer sunscreen agents</h2>



<p>Recent debates have cast a shadow over synthetic sunscreen filters. Concerns have arisen regarding their potential adverse effects on health and the environment. Could nature’s own sunscreen, urocanic acid, be the answer?</p>



<p>Urocanic acid, as a naturally occurring sunscreen in our <a href="https://www.earth.com/news/skins-secret-strength-shields-against-puncture-damage/" target="_blank" rel="noreferrer noopener">skin</a>, absorbs both UV–A and UV–B radiation. However, its sun protection factor (SPF) is a mere 1.58, which is significantly less effective than synthetic sunscreens. </p>



<p>Another issue is that urocanic acid can convert into an immunosuppressive molecular variant when exposed to UV radiation.</p>



<p>"You might think that all this makes urocanic acid not fit for use in a sunscreen," said Professor Buma.</p>



<p>"But it is definitely worth investigating. We think it is possible to design effective urocanic acid-based biomimetic sunscreens with a more favorable toxicological profile and optimize their photochemical and photophysical characteristics."</p>



<h2 class="wp-block-heading" id="h-revolutionary-sunscreen-urocanic-acid">Revolutionary sunscreen: Urocanic acid</h2>



<p>By cobbling together high-resolution laser spectroscopy of isolated molecules and quantum chemical calculations, Buma and his team achieved a fundamental understanding of how urocanic acid interacts with UV light.</p>



<p>The team noted that previous studies had inadvertently obtained data from decomposition products rather than actual urocanic acid molecules. This new realization has reshaped the field.</p>



<p>The knowledge gained from the team's research has opened up new avenues for optimizing potential sunscreen formulations based on urocanic acid derivatives. They've also identified stable derivatives that could potentially reduce the immunosuppressive effects of 'plain' urocanic acid.</p>



<h2 class="wp-block-heading" id="h-potential-environmental-benefits">Potential environmental benefits</h2>



<p>One notable advantage of exploring urocanic acid as a sunscreen filter is its potential to mitigate the environmental concerns associated with synthetic sunscreens. </p>



<p>Traditional sunscreens often wash off in water, harming marine life and contributing to coral reef degradation. Since urocanic acid is a natural compound, it presents a more environmentally-friendly alternative. </p>



<p>Further research is needed to assess the ecological impact fully, but initial findings suggest that formulations based on urocanic acid could provide effective sun protection while minimizing harm to aquatic ecosystems.</p>



<h2 class="wp-block-heading" id="h-future-of-sunscreen-innovation">Future of sunscreen innovation</h2>



<p>As contemporary sunscreen research progresses, the promising properties of urocanic acid continue to capture the scientific community's imagination. </p>



<p>By harnessing advanced photochemistry and materials science, researchers like Buma and Stavros aim to develop next-generation sunscreen formulations that combine safety, efficacy, and environmental consciousness. </p>



<p>In a future where sun protection aligns with sustainability, urocanic acid stands poised to redefine how we shield ourselves from the <a href="https://www.earth.com/news/sunscreen-gives-us-a-false-sense-of-security/" target="_blank" rel="noreferrer noopener">sun’s harmful rays</a>. </p>



<p>As this research moves forward, collaborations across scientific fields will be essential in transforming these theoretical advantages into practical, widely available applications.</p>



<h2 class="wp-block-heading" id="h-urocanic-acid-as-a-natural-sunscreen">Urocanic acid as a natural sunscreen</h2>



<p>This revolutionary work has sparked renewed interest in this class of molecules. </p>



<p>"This could ultimately lead to novel sunscreen filters, but also to novel applications in areas where photothermal materials are employed," said Professor Buma.</p>



<p>Only time will tell what the future holds for urocanic acid and its potential uses.</p>



<p>The study is published in the journal <em><a href="https://pubs.rsc.org/en/content/articlelanding/2024/cp/d4cp02088j" target="_blank" rel="noreferrer noopener">Physical Chemistry Chemical Physics</a></em>.</p>



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Common acid in our skin could be a natural sunscreen

Ever wondered what keeps your skin from turning crispy under...

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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



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



<p>-----</p>



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

For decades, astronomers have puzzled over the intense heat and...

<p>Nanoplastics are an invisible threat that we rarely consider, despite their ubiquitous presence in our lives.</p>



<p>Beyond the undeniable environmental harm caused by plastics, these tiny particles silently impact our health in surprising ways.</p>



<p>Our homes, which should be our safe havens, are particularly affected, as indoor air contains five times as much nanoplastic as outdoor air.</p>



<p>Researchers have pointed out that these minuscule particles come from common sources like packaging and textiles, especially nylon.</p>



<h2 class="wp-block-heading" id="h-discovery-in-sweden-a-cautionary-tale">Discovery in Sweden: A cautionary tale</h2>



<p>This invisible danger has been highlighted in recent research from <a href="https://www.umu.se/en/" target="_blank" rel="noreferrer noopener">Umeå University</a> in Sweden.</p>



<p>The eye-opening study focuses on a side of this issue that is less well known yet critical: how nanoplastics can potentially disrupt our bodies' reactions to antibiotics.</p>



<p>"The results are alarming, considering how common nanoplastics are and because effective <a href="https://www.earth.com/news/antibiotics-for-childhood-infections-are-becoming-ineffective/" target="_blank" rel="noreferrer noopener">antibiotics</a> for many can be the difference between life and death," noted Lukas Kenner, professor at the Department of Molecular Biology at Umeå University, who led the research.</p>



<h2 class="wp-block-heading" id="h-what-are-nanoplastics">What are nanoplastics?</h2>



<p>Nanoplastics, a term you might be hearing for the first time, are miniscule <a href="https://www.earth.com/news/microplastic-pollution-is-everywhere-even-in-newborns-and-getting-worse/" target="_blank" rel="noreferrer noopener">plastic particles</a>, smaller than a thousandth of a millimetre.</p>



<p>Their tiny size lets them float freely in the air, with the unfortunate consequence that they can enter our bodies effortlessly.</p>



<p>The study reveals how these common nanoplastics interact with tetracycline, a broad-spectrum antibiotic frequently used in medical treatments. </p>



<p>Alarmingly, it turns out that the nanoplastics absorb antibiotics and accumulate them on their surfaces.</p>



<h2 class="wp-block-heading" id="h-antibiotics-on-a-detour">Antibiotics on a detour</h2>



<p>The absorbed antibiotics can then potentially hitch a ride with the nanoplastics in our bloodstream.</p>



<p>This means that the antibiotics might be transported to places in the body where they were not intended to go.</p>



<p>This misdirection can reduce the targeted effect of the antibiotics and potentially spur the development of <a href="https://www.earth.com/news/scientists-create-viruses-to-combat-antibiotic-resistant-bacteria/" target="_blank" rel="noreferrer noopener">antibiotic-resistant bacteria</a>, when these drugs accumulate in unintended areas.</p>



<p>The bond was particularly strong between antibiotic and nylon - one of the substances that is an abundant nanoplastic in indoor air.</p>



<h2 class="wp-block-heading" id="h-further-research-is-needed">Further research is needed</h2>



<p>"Although more research is needed to shed light on the connections and possible measures, we can conclude from our results that nanoplastics are a <a href="https://www.earth.com/news/hundreds-of-thousands-of-nanoplastics-found-in-bottled-water/" target="_blank" rel="noreferrer noopener">health risk</a> that should be taken more seriously," said Kenner.</p>



<p>This critical study was conducted in collaboration with international scientists based at the University of Bonn, Germany, and the University of Debrecen, Hungary.</p>



<p>The sub-study on the binding of nanoplastics to antibiotics was notably led by Nikola Zlatkov Kolev from Umeå University.</p>



<h2 class="wp-block-heading" id="h-nanoplastics-more-than-just-a-nuisance">Nanoplastics: More than just a nuisance</h2>



<p>The research highlights the urgent need for further investigation into the potential health impacts of nanoplastics.</p>



<p>While we wait for additional information, it's crucial that we understand the risks associated with the everyday materials we use.</p>



<h2 class="wp-block-heading" id="h-how-nanoplastics-enter-our-bodies">How nanoplastics enter our bodies</h2>



<p>Nanoplastics are not just floating threats; their tiny size enables them to evade our natural defenses as well. These microscopic particles can enter our bodies through inhalation, ingestion, and even skin contact.</p>



<p>Once inside, nanoplastics have the potential to accumulate in tissues and organs, disrupting their cellular functions.</p>



<p>Emerging research indicates that their interaction with biological systems may contribute to inflammation, oxidative stress, and even long-term health issues, such as chronic diseases or immune system imbalances.</p>



<p>The ability of nanoplastics to bind with other chemicals, including antibiotics, raises even more concern. It’s not just about where these particles end up in the body but also about the compounds they carry along the way.</p>



<h2 class="wp-block-heading" id="h-steps-to-minimize-exposure">Steps to minimize exposure </h2>



<p>While waiting for more research and policy interventions, there are practical steps we can take to reduce  exposure to nanoplastics in our daily lives.</p>



<p>Start by reducing your use of synthetic materials, especially nylon-based products, and opt for natural fibers when possible. </p>



<p>Regularly ventilate your home to help minimize the concentration of airborne nanoplastics indoors. Additionally, investing in air purifiers with HEPA filters can capture these microscopic particles.</p>



<p>Avoid single-use <a href="https://www.earth.com/news/4200-harmful-plastic-chemicals-hidden-in-everyday-objects/" target="_blank" rel="noreferrer noopener">plastics</a> and unnecessary packaging, as these items degrade over time and release nanoplastics into the air.</p>



<p>These small changes, when adopted widely, can collectively reduce the risks posed by nanoplastics in our homes.</p>



<p>The full study was published in the journal <em><a href="https://www.nature.com/articles/s41598-024-75785-4" target="_blank" rel="noreferrer noopener">Scientific reports</a></em>.</p>



<p>-----</p>



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Nanoplastics can alter the course of antibiotics in our body

Nanoplastics are an invisible threat that we rarely consider, despite...

<p>The nature of dark matter has puzzled astronomers for 90 years since discovering that 85% of the universe's matter is invisible through our telescopes.&nbsp;</p>



<p>Currently, the most promising candidate for dark matter is the axion, a lightweight particle that scientists worldwide are fervently trying to detect.</p>



<p>Astrophysicists at the <a href="https://www.berkeley.edu/" target="_blank" rel="noreferrer noopener">University of California, Berkeley</a>, now suggest that axions could be discovered within seconds of detecting gamma rays from a nearby <a href="https://www.earth.com/news/supernova-explosions-could-damage-distant-planets/" target="_blank" rel="noreferrer noopener">supernova explosion</a>.&nbsp;</p>



<p>If axions exist, they would be produced in large quantities during the first 10 seconds after a massive star collapses into a neutron star. These axions would escape and transform into high-energy gamma rays within the star's intense magnetic field.</p>



<h2 class="wp-block-heading" id="h-detecting-gamma-rays-from-supernova-explosions">Detecting gamma rays from supernova explosions </h2>



<p>Detecting these <a href="https://www.earth.com/news/brightest-gamma-ray-burst-ever-recorded-had-a-rare-energy-peak/" target="_blank" rel="noreferrer noopener">gamma rays</a> today is possible only if the Fermi Gamma-ray Space Telescope - the sole gamma-ray telescope currently in orbit - is pointing in the direction of the supernova at the time it explodes. Given the telescope's field of view, there's about a one-in-ten chance of this happening.</p>



<p>Yet, a single detection of gamma rays would pinpoint the mass of the axion, particularly the so-called QCD axion, across a vast range of theoretical masses, including those currently being investigated in Earth-based experiments.&nbsp;</p>



<p>Conversely, the lack of a detection would eliminate a large range of potential masses for the axion, rendering many current <a href="https://www.earth.com/news/existence-of-dark-matter-confirmed-by-new-study/" target="_blank" rel="noreferrer noopener">dark matter</a> searches irrelevant.</p>



<h2 class="wp-block-heading" id="h-searching-in-our-cosmic-neighborhood">Searching in our cosmic neighborhood </h2>



<p>The issue is that, for the gamma rays to be bright enough to detect, the supernova must be nearby - within our Milky Way galaxy or one of its satellite galaxies.&nbsp;</p>



<p>Nearby stars explode, on average, only every few decades. The last nearby supernova was in 1987 in the Large Magellanic Cloud, a satellite of the Milky Way.&nbsp;</p>



<p>At that time, a now-defunct gamma-ray telescope, the Solar Maximum Mission, was pointing in the supernova's direction but wasn't sensitive enough to detect the predicted intensity of gamma rays, according to the UC Berkeley team's analysis.</p>



<h2 class="wp-block-heading" id="h-seeking-the-true-nature-of-dark-matter">Seeking the true nature of dark matter </h2>



<p>Benjamin Safdi is an associate professor of physics at UC Berkeley and senior author of the study.</p>



<p>“If we were to see a supernova, like supernova 1987A, with a modern gamma-ray telescope, we would be able to detect or rule out this QCD axion, this most interesting axion, across much of its parameter space - essentially the entire parameter space that cannot be probed in the laboratory, and much of the parameter space that can be probed in the laboratory, too. And it would all happen within 10 seconds," explained Professor Safdi.</p>



<p>The researchers are concerned that when the long-overdue supernova occurs in the nearby universe, we won't have the necessary instruments to observe the gamma rays produced by axions. </p>



<h2 class="wp-block-heading" id="h-a-fleet-of-gamma-ray-telescopes">A fleet of gamma-ray telescopes</h2>



<p>In discussions with colleagues who build gamma-ray telescopes, the experts are exploring the feasibility of launching one - or a fleet - of such telescopes to cover 100% of the sky 24/7, ensuring any gamma-ray burst would be detected.</p>



<p>The researchers have even proposed a name for their full-sky gamma-ray satellite constellation: the GALactic AXion Instrument for Supernova, or GALAXIS.</p>



<p>“I think all of us on this paper are stressed about there being a next supernova before we have the right instrumentation,” noted Safdi. “It would be a real shame if a supernova went off tomorrow and we missed an opportunity to detect the axion - it might not come back for another 50 years.”</p>



<h2 class="wp-block-heading" id="h-the-search-for-dark-matter">The search for dark matter</h2>



<p>Initial searches for dark matter focused on faint, massive compact halo objects (MACHOs) theorized to be sprinkled throughout our galaxy and the cosmos.&nbsp;</p>



<p>When these didn't materialize, physicists shifted their attention to elementary particles that should be detectable in Earth-bound labs. Weakly interacting massive particles (WIMPs) also failed to show up.&nbsp;</p>



<p>In the quest to find the true nature of dark matter, the best candidate is the axion - a particle that fits well within the standard model of physics and solves several outstanding puzzles in particle physics.</p>



<p>“It seems almost impossible to have a consistent theory of gravity combined with quantum mechanics that does not have particles like the axion,” Safdi said.</p>



<h2 class="wp-block-heading" id="h-strongest-candidate-for-an-axion">Strongest candidate for an axion </h2>



<p>Axions also naturally emerge from string theory - a hypothesis about the universe's underlying geometry - and might help unify <a href="https://www.earth.com/news/radical-new-theory-finally-unites-gravity-spacetime-and-the-quantum-realm/" target="_blank" rel="noreferrer noopener">gravity</a>, which explains interactions on cosmic scales, with quantum mechanics, which describes the infinitesimal.&nbsp;</p>



<p>The strongest candidate for an axion is the QCD axion, named after quantum chromodynamics, the prevailing theory of the strong force.&nbsp;</p>



<p>Theoretically, QCD axions interact weakly with all matter through the four fundamental forces: gravity, electromagnetism, the strong force, and the weak force.&nbsp;</p>



<p>One consequence is that, in a strong magnetic field, an axion should occasionally transform into an electromagnetic wave, or photon. This distinguishes axions from neutrinos, which only interact through gravity and the weak force and ignore electromagnetism.</p>



<h2 class="wp-block-heading" id="h-neutron-stars-and-axion-detection">Neutron stars and axion detection</h2>



<p>Laboratory experiments - such as the ALPHA Consortium (Axion Longitudinal Plasma Haloscope), DMradio, and ABRACADABRA, all involving UC Berkeley researchers - use compact cavities that resonate with and amplify the faint electromagnetic field or photon produced when a low-mass axion transforms in the presence of a strong magnetic field.</p>



<p>Astrophysicists have also proposed looking for axions produced inside <a href="https://www.earth.com/news/neutron-star-collisions-push-the-limits-of-extreme-physics/" target="_blank" rel="noreferrer noopener">neutron stars</a> immediately after a core-collapse supernova, like 1987A. Until now, they've primarily focused on detecting gamma rays from these axions' slow transformation into photons in the magnetic fields of galaxies. </p>



<p>Safdi and his colleagues realized that this process is not very efficient at producing gamma rays detectable from Earth.</p>



<p>Instead, they explored the production of gamma rays by axions in the strong magnetic fields around the very star that generated the axions. Supercomputer simulations showed that this process very efficiently creates a burst of gamma rays dependent on the axion's mass.&nbsp;</p>



<h2 class="wp-block-heading" id="h-burst-of-neutrinos-from-a-hot-star">Burst of neutrinos from a hot star </h2>



<p>This burst should occur simultaneously with a burst of neutrinos from inside the hot neutron star. However, the burst of axions lasts a mere 10 seconds after the neutron star forms - after that, the production rate drops dramatically - though it happens hours before the outer layers of the star explode.</p>



<p>“This has really led us to thinking about neutron stars as optimal targets for searching for axions as axion laboratories,” Safdi said. "Neutron stars have a lot of things going for them. They are extremely hot objects. They also host very strong magnetic fields.” </p>



<p>“The strongest magnetic fields in our universe are found around neutron stars, such as magnetars, which have magnetic fields tens of billions of times stronger than anything we can build in the laboratory. That helps convert these axions into observable signals.”</p>



<h2 class="wp-block-heading" id="h-advancing-the-search-for-axions">Advancing the search for axions</h2>



<p>Two years ago, Safdi and his colleagues established the best upper limit on the mass of the QCD axion at about 16 million electron volts, or about 32 times less than the mass of the electron. This was based on the cooling rate of neutron stars, which would cool faster if axions were produced along with neutrinos inside these hot, dense objects.</p>



<p>In the current paper, the UC Berkeley team not only describes the production of gamma rays following a core collapse to a neutron star but also uses the non-detection of gamma rays from the 1987A supernova to set the best constraints yet on the mass of axion-like particles, which differ from QCD axions in that they do not interact via the strong force.</p>



<p>They predict that a gamma-ray detection would allow them to identify the QCD axion mass if it is above 50 microelectron volts (μeV), or about one ten-billionth the mass of the electron. A single detection could refocus existing experiments to confirm the mass of the axion, Safdi said.&nbsp;</p>



<p>While a fleet of dedicated gamma-ray telescopes is the best option for detecting gamma rays from a nearby supernova, a fortunate observation with Fermi would be even better.</p>



<p>“The best-case scenario for axions is Fermi catches a supernova. It's just that the chance of that is small,” Safdi said. “But if Fermi saw it, we'd be able to measure its mass. We'd be able to measure its interaction strength. We'd be able to determine everything we need to know about the axion, and we'd be incredibly confident in the signal because there's no ordinary matter which could create such an event.”</p>



<h2 class="wp-block-heading" id="h-uncovering-the-true-nature-of-dark-matter">Uncovering the true nature of dark matter </h2>



<p>The researchers are anxious about missing a rare opportunity to detect axions due to inadequate instrumentation. They will continue to discuss the feasibility of launching new gamma-ray telescopes to ensure continuous sky coverage.</p>



<p>Safdi's team believes that capturing gamma rays from a nearby supernova could not only confirm the existence of axions but also provide detailed information about their properties. This could revolutionize our understanding of dark matter and the fundamental forces of nature.</p>



<p>The quest to uncover the true nature of dark matter continues to drive innovation in astrophysics. By focusing on gamma rays emitted during supernova explosions, scientists hope to finally detect axions and solve one of the most enduring mysteries in physics.&nbsp;</p>



<p>The stakes are high, and time is of the essence. With the potential for a nearby supernova to occur at any moment, researchers are eager to have the right tools in place to seize this fleeting opportunity.</p>



<p>The study is published in the journal <a href="http://dx.doi.org/10.1103/PhysRevLett.133.211002" target="_blank" rel="noreferrer noopener"><em>Physical Review Letters</em></a>.</p>



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The true nature of dark matter may be revealed in a supernova

The nature of dark matter has puzzled astronomers for 90...

<p>The Chinese Mars rover Zhurong is adding an exciting twist to the story and history of water on Mars. </p>



<p>After landing in southern Utopia Planitia on Mars in May 2021, the now-defunct Zhurong rover went to work exploring the Martian surface, and its latest findings might just change the way we think about the Red Planet.</p>



<p>Bo Wu and a team of researchers from <a href="https://www.polyu.edu.hk/en/" target="_blank" rel="noreferrer noopener">Hong Kong Polytechnic University</a> believe they've found compelling evidence of an ocean shoreline for a massive body of water that once covered Mars' northern lowlands.</p>



<h2 class="wp-block-heading" id="h-what-is-the-zhurong-mars-rover">What is the Zhurong Mars rover?</h2>



<p>The Zhurong rover is <a href="https://www.earth.com/news/china-plans-to-inhabit-a-space-station-on-the-moon-by-2030/" target="_blank" rel="noreferrer noopener">China's first foray</a> into Martian exploration, landing successfully on Mars in May 2021 as part of the <a href="https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2020-049A" target="_blank" rel="noreferrer noopener">Tianwen-1</a> mission. </p>



<p>Weighing around 240 kilograms (530 lbs) -- about the size of a small car -- Zhurong is packed with scientific instruments, including navigation and topography cameras, a multispectral camera for analyzing surface materials, and a ground-penetrating radar that can probe up to 100 meters beneath the surface. </p>



<p>These tools allow Zhurong to capture detailed images, study the composition of rocks and soil, and investigate the planet's subsurface structures.</p>



<p>What sets Zhurong apart is its ability to study Mars both above and below ground. The ground-penetrating radar is particularly exciting because it helps scientists search for signs of water ice and understand the geological layers hidden <a href="https://www.earth.com/news/does-life-exist-below-the-icy-surface-of-mars/" target="_blank" rel="noreferrer noopener">beneath the surface.</a> </p>



<p>The rover also carries instruments to examine <a href="https://www.earth.com/news/the-internal-structure-of-mars-core-is-finally-revealed/" target="_blank" rel="noreferrer noopener">Mars' magnetic field</a> and atmospheric conditions, contributing valuable data to our understanding of the planet's climate and potential for habitability.</p>



<h2 class="wp-block-heading" id="h-zhurong-sees-water-related-features-on-mars">Zhurong sees water-related features on Mars</h2>



<p>For years, scientists have pondered the possibility of a vast ocean on Mars, especially during the Hesperian period about 3.7 billion years ago. Concrete proof, however, has been hard to come by. </p>



<p>Using a mix of Zhurong's onboard cameras and ground-penetrating radar, plus remote sensing data from orbiting satellites, the team identified several intriguing water-related features around the rover's landing area.</p>



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2024/11/Zhurong-mars-rover_china_landing-site_ocean-shore_Sci-Reports_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/Zhurong-mars-rover_china_landing-site_ocean-shore_Sci-Reports_1s.webp" alt="The Zhurong landing site (red cross) shown on the geologic map by Tanaka et al. Regions of different colors indicate different geologic units. The red box shows the study area, covering an area of ~ 1800 km × 800 km. The thick black line is the Deuteronilus contact indicating a possible shoreline across the region. The background map is a shaded relief of the MOLA topography." class="wp-image-1951081"/></a><figcaption class="wp-element-caption"><em>The Zhurong landing site (red cross) shown on the geologic map by Tanaka et al. Regions of different colors indicate different geologic units. The red box shows the study area, covering an area of ~ 1800 km × 800 km. The thick black line is the Deuteronilus contact indicating a possible shoreline across the region. The background map is a shaded relief of the MOLA topography.</em></figcaption></figure>



<p>Since touching down, Zhurong has traveled about 1.2 miles, studying the geology of its surroundings in search of signs of water or ice. </p>



<p>The features spotted include crater-like pitted cones, troughs, sediment channels, and <a href="https://www.earth.com/news/water-frost-detected-on-mars-enormous-volcanoes/" target="_blank" rel="noreferrer noopener">mud volcano formations</a>. If that sounds like the remnants of a beachfront, you're onto something. </p>



<p>According to Bo Wu and his colleagues, these formations are consistent with what you'd expect to find in a nearshore zone, suggesting this area was once a coastline.</p>



<h2 class="wp-block-heading" id="h-dating-the-martian-ocean">Dating the Martian ocean</h2>



<p>Based on the composition of surface deposits, the team estimates that the ocean likely existed around 3.68 billion years ago. </p>



<p>"The water was heavily silted, forming the layering structure of the deposits," study co-author Sergey Krasilnikov of the Hong Kong Polytechnic University told Reuters. </p>



<p>This silt-laden water would have created distinct sedimentary layers, much like those found in ancient seabeds on Earth.</p>



<p>Interestingly, the researchers propose that after forming, the ocean froze over for about 10,000 to 100,000 years -- a mere <a href="https://www.earth.com/news/when-was-mars-habitable-much-more-recently-than-we-thought/" target="_blank" rel="noreferrer noopener">blink in geological terms</a>. </p>



<p>This freezing period etched out the coastline features observed today before the ocean eventually dried up roughly 260 million years later. Imagine a vast frozen ocean, sitting quietly on Mars, waiting for its turn to disappear.</p>



<h2 class="wp-block-heading" id="h-not-everyone-agrees">Not everyone agrees</h2>



<p>However, not everyone is jumping on the bandwagon. </p>



<p>Benjamin Cardenas of <a href="https://www.psu.edu/" target="_blank" rel="noreferrer noopener">Pennsylvania State University</a> points out that erosion over billions of years would likely have erased such delicate features. It's a fair concern -- Mars isn't exactly a place where things stay preserved forever. </p>



<p>Wu acknowledges this skepticism but suggests that asteroid impacts might have resurfaced portions of the shoreline, making them detectable today.</p>



<h2 class="wp-block-heading" id="h-implications-for-martian-life">Implications for Martian life</h2>



<p>So, what does all this mean in the grand scheme of things? Well, the presence of an ancient ocean has profound implications for <a href="https://www.earth.com/news/meteorite-that-struck-mars-reveals-when-the-planet-had-liquid-water/" target="_blank" rel="noreferrer noopener">our understanding of Mars</a>. </p>



<p>Water is a key ingredient for life as we know it. If Mars had oceans, could it have also hosted life? It's a tantalizing thought that keeps scientists up at night.</p>



<h2 class="wp-block-heading" id="h-nasa-s-insight-lander">NASA's Insight Lander </h2>



<p>Adding another layer to the mystery, <a href="https://science.nasa.gov/mission/insight/" target="_blank" rel="noreferrer noopener">NASA's Insight lander</a> found that a significant amount of water had seeped into Mars's crust. </p>



<p>"At least we have identified a place that should, in principle, be able to sustain life," Michael Manga of the <a href="https://www.universityofcalifornia.edu/" target="_blank" rel="noreferrer noopener">University of California</a>, one of the study authors, said in a previous statement. </p>



<p>This underground water could have provided a stable environment for <a href="https://www.earth.com/news/insights-alien-life-mars-water-sulfur-discovered-gained-studying-extreme-life-earth/" target="_blank" rel="noreferrer noopener">life to develop</a>.</p>



<h2 class="wp-block-heading" id="h-what-s-next-for-zhurong-and-mars-water">What's next for Zhurong and Mars water?</h2>



<p>But here's the kicker: to get definitive answers, we need to bring Martian samples back to Earth for detailed analysis. </p>



<p>China's Tianwen 3 Mars sample return mission aims to do just that by 2031, potentially beating NASA's own sample return mission to the punch. </p>



<p>If all goes according to plan, we'll have pieces of Mars right here on Earth in less than a decade.</p>



<p>As we await these missions, Zhurong continues to send valuable data, inching us closer to understanding the Red Planet's watery past. </p>



<p>Could Mars have been teeming with life billions of years ago? It's the million-dollar question. Only time -- and more research -- will tell.</p>



<p>The full study was published in the journal <em><a href="https://www.nature.com/articles/s41598-024-75507-w" target="_blank" rel="noreferrer noopener">Scientific Reports</a></em>.</p>



<p>-----</p>



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Mars Zhurong rover finds an ocean shoreline on the Red Planet

The Chinese Mars rover Zhurong is adding an exciting twist...

<p>Human-caused climate change has intensified the strength of Atlantic hurricanes by about 18 miles per hour (29 kilometers per hour) over the past six years, according to a recent study.</p>



<p>For most of the 40 storms analyzed, the extra energy from warmer oceans caused them to escalate by an entire hurricane category, as reported in the journal <a href="https://dx.doi.org/10.1088/2752-5295/ad8d02" target="_blank" rel="noreferrer noopener"><em>Environmental Research: Climate</em></a>. </p>



<p>According to the National Oceanic and Atmospheric Administration (<a href="https://www.noaa.gov/" target="_blank" rel="noreferrer noopener">NOAA</a>), a Category 5 storm causes more than 400 times the damage of a minimal Category 1 hurricane, over 140 times the damage of a minimal Category 3 hurricane, and more than five times the damage of a minimal Category 4 storm.</p>



<h2 class="wp-block-heading" id="h-significant-increases-in-wind-speed">Significant increases in wind speed</h2>



<p>For three storms, including this month's Hurricane Rafael, climate change boosted <a href="https://www.earth.com/news/new-method-developed-to-measure-the-wind/" target="_blank" rel="noreferrer noopener">wind</a> speeds so much that they increased by two storm categories. According to the study authors, this is not about more storms but increasing power from the worst storms.</p>



<p>“We know that the intensity of these storms is causing a lot more catastrophic damage in general,” said lead author Daniel Gilford, a climate scientist at <a href="https://www.climatecentral.org/" target="_blank" rel="noreferrer noopener">Climate Central</a>, which conducts research on global warming. “Damages do scale (up) with the intensity.”</p>



<h2 class="wp-block-heading" id="h-hurricane-strength-in-a-warmer-climate">Hurricane strength in a warmer climate </h2>



<p>The effect was especially noticeable in more powerful storms, including those that reached the top of the Saffir-Simpson scale of storm intensity: Category Five, according to the study's authors.&nbsp;</p>



<p>While the study focused on storms from 2019 to 2023, the researchers included recent named storms from this year, all of which experienced an increase due to <a href="https://www.earth.com/news/coastal-hurricanes-are-intensifying-faster-due-to-climate-change/" target="_blank" rel="noreferrer noopener">climate change</a>.</p>



<p>“We had two Category Five storms here in 2024,” Gilford said. “Our analysis shows that we would have had zero Category Five storms without human-caused climate change.”</p>



<h2 class="wp-block-heading" id="h-notable-hurricanes-that-gained-strength">Notable hurricanes that gained strength </h2>



<p>This year's three most devastating storms - Beryl, Helene, and Milton - increased by 18 mph (29 kph), 16 mph (26 kph), and 24 mph (39 kph) respectively because of climate change, the authors stated.&nbsp;</p>



<p>A separate study by <a href="https://www.worldweatherattribution.org/" target="_blank" rel="noreferrer noopener">World Weather Attribution</a> (WWA) found that deadly Helene's wind speed increased by about 13 mph, which is close, noted <a href="https://www.imperial.ac.uk/" target="_blank" rel="noreferrer noopener">Imperial College London</a> climate scientist Friederike Otto, who coordinates the WWA team and praised the Climate Central work.</p>



<p>“It absolutely makes sense from a fundamental standpoint that what's going on is we've added more energy to the system,” NOAA chief Rick Spinrad said at United Nations climate talks in Baku, Azerbaijan. </p>



<p>“The change is going to manifest in terms of what we're already seeing. You look at Hurricane Helene which was massive, 500 miles across. We're going to see changes in terms of the velocity of these storms. We're going to see changes in terms of Hurricane Milton spawning so many tornadoes.”</p>



<h2 class="wp-block-heading" id="h-consistent-patterns-over-recent-years">Consistent patterns over recent years</h2>



<p>Since 2019, eight storms - 2019's Humberto, 2020's Zeta, 2021's Sam and Larry, 2022's Earl, 2023's Franklin, and 2024's Isaac and Rafael - have increased by at least 25 mph (40 kph) in wind speed. Humberto and Zeta saw the most significant gains, each increasing by 31 miles per hour (50 kph).</p>



<p>In 85% of the storms studied over the last six years, the authors observed a clear fingerprint of climate change in <a href="https://www.earth.com/news/what-causes-the-rapid-intensification-of-hurricanes/" target="_blank" rel="noreferrer noopener">storm strength</a>, Gilford said.</p>



<h2 class="wp-block-heading" id="h-warmer-oceans-and-hurricane-strength">Warmer oceans and hurricane strength</h2>



<p>Warm water is the main fuel for hurricanes. The warmer the Atlantic, Caribbean, and Gulf of Mexico become, the more potential energy is available for storms. Other factors - such as high-level crosswinds and dry air - can weaken hurricanes.</p>



<p>The waters in hurricane-prone areas have increased by 2 to 3 degrees Fahrenheit (1.1 to 1.6 degrees Celsius) on average, and by as much as 4 degrees Fahrenheit (2.2 degrees Celsius) due to climate change, Gilford explained.&nbsp;</p>



<h2 class="wp-block-heading" id="h-linking-warmer-water-to-stronger-storms">Linking warmer water to stronger storms</h2>



<p>This information comes from Climate Central's use of scientifically accepted techniques to regularly track how much warmer oceans are due to the burning of coal, oil, and natural gas.</p>



<p>The experts use computer simulations to create a fictional world without human-caused warming and then compare it to current reality, attributing the differences to <a href="https://www.earth.com/news/2023-climate-change-report-record-high-temperatures-greenhouse-gases-sea-level-rise/" target="_blank" rel="noreferrer noopener">greenhouse gases</a>. </p>



<p>They also account for other factors, such as the reduction of sulfate pollution from marine shipping, which had been slightly counteracting the warming before skies became clearer.</p>



<p>To understand how warmer waters lead to stronger storms, the authors examined a parameter called potential intensity, which is essentially the speed limit for any given storm based on the environmental conditions around it.</p>



<h2 class="wp-block-heading" id="h-expert-insights-and-future-implications">Expert insights and future implications</h2>



<p><a href="https://www.mit.edu/">MIT</a> hurricane expert and meteorology professor Kerry Emanuel, who pioneered potential intensity measurements, wasn't part of the study but said the findings are logical. It demonstrates the increase in storm strength that he predicted would occur 37 years ago, he noted.</p>



<p>Previous studies have shown that climate change has caused hurricanes to intensify more quickly and move more slowly, leading to increased rainfall.</p>



<p>-----</p>



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Climate change has amplified hurricane strength

Human-caused climate change has intensified the strength of Atlantic hurricanes...

<p>Who doesn't love a bit of sparkle? We've seen it with many singers in their bling-filled performances. Yet, this desire for dazzle isn't just confined to the world of pop music. </p>



<p>In the animal kingdom, you can find shiny creatures like jewel beetles and the fabulous <em>Opaluma rupaul</em> - a fly named after the iconic entertainer RuPaul - that boast flashy appearances.</p>



<p>Now, wouldn't such obvious displays make these animals easy targets for predators? As surprising as it may sound, science suggests otherwise.</p>



<h2 class="wp-block-heading" id="h-power-of-changeability">Power of changeability</h2>



<p>One might think that standing out like a brilliant beacon would guarantee a <a href="https://www.earth.com/news/largest-predator-prey-feast-ever-seen-in-the-ocean-enormous-quickly-altered-food-chain/" target="_blank" rel="noreferrer noopener">predator’s attention</a>. However, these unusually bright features aren't just for attracting attention.</p>



<p>A particular trait of these shiny appearances - their changeability - can actually aid the animals in evading predators.</p>



<h2 class="wp-block-heading" id="h-environment-as-camouflage">Environment as camouflage</h2>



<p>Shiny animals, when they reflect the sun, produce bright flashes. The mirror-like aspect of their bodies also reflects the environment around them. </p>



<p>This constant change of reflections as the <a href="https://www.earth.com/news/animals-got-their-colors-150-million-years-before-plants/" target="_blank" rel="noreferrer noopener">animals</a> move can be compared to a mirror ball. For a predator, tracking down a prey that exhibits such visual variability becomes a difficult task.</p>



<h2 class="wp-block-heading" id="h-challenges-of-chasing-shiny-animals">Challenges of chasing shiny animals</h2>



<p>Tests involving both bird and insect <a href="https://www.earth.com/news/predators-increase-the-health-of-prey-populations-but-reduce-their-size/" target="_blank" rel="noreferrer noopener">predators</a> have revealed a common struggle - they find it challenging to be accurate when they attack a visually changing prey.</p>



<p>So, what exactly triggers this effect? Is it the predator's inability to track the prey visually ? Or perhaps it involves a misjudgment of prey speed? Are optical illusions at play?</p>



<h2 class="wp-block-heading" id="h-illusion-of-speed-and-position">Illusion of speed and position</h2>



<p>Studies involving humans have shown the potential for optical illusions to disrupt prey speed perception. For instance, black and white stripes can make a target appear to be moving faster or slower than its actual speed. </p>



<p>When a predator encounters highly reflective, shiny targets, a similar effect could lead them to misjudge the prey's speed.</p>



<p>Moreover, bright flashes from a shiny animal may cause a flash-lag illusion, making the predators perceive the prey's position to be slightly behind its real position.</p>



<h2 class="wp-block-heading" id="h-shiny-animals-confuse-predators">Shiny animals confuse predators</h2>



<p>Both the disruption of speed perception and the flash-lag illusion can result in directional errors in predator behaviors. </p>



<p>This means <a href="https://www.earth.com/news/danger-zones-climate-change-is-altering-predator-prey-dynamics/" target="_blank" rel="noreferrer noopener">predator tracking and attacks</a> might often be ahead of or trailing behind the target, relative to the target's actual movement direction.</p>



<p>Additionally, the unpredictable appearance of the shiny prey might confuse predators about the precise location of a moving prey. Ultimately, the tracking and final attack by a predator might end up being less accurate.</p>



<h2 class="wp-block-heading" id="h-experimenting-with-jumping-spiders">Experimenting with jumping spiders</h2>



<p>A group of scientists from <a href="https://www.unimelb.edu.au" target="_blank" rel="noreferrer noopener">The University of Melbourne</a> used a high-speed camera to film jumping spiders attacking fake, moving targets.</p>



<p>Jumping spiders were selected for this experiment because they prefer moving prey, eat both shiny and matte prey, and possess excellent vision. Plus, they willingly attack fake moving prey in a lab setting.</p>



<h2 class="wp-block-heading" id="h-interpreting-the-findings">Interpreting the findings</h2>



<p>The high-speed footage enabled the researchers to quantify how well the jumping spiders visually tracked different targets and how accurate their attacks were.</p>



<p>The results revealed that jumping spiders had a harder time tracking and attacking shiny targets compared to matte ones or to those that matched the background. Specifically, their tracking was nearly twice as variable with shiny targets, and their attacks were significantly further away from these same targets.</p>



<p>Notably, these results were not directional relative to the target's path of movement. This does not support the idea that shininess disrupts speed perception, or that localization is disrupted by the flash-lag illusion.</p>



<h2 class="wp-block-heading" id="h-dazzle-and-dodge-defense-of-shiny-animals">Dazzle and dodge: Defense of shiny animals</h2>



<p>In conclusion, while shiny animals may catch the eye, they prove difficult to localize and capture. The research study sheds light on how shiny colors might disrupt perception and lead to these effects.</p>



<p>However, this research is only the tip of the iceberg. There's still much to understand about how these effects are visually processed in animals with different eyes, and how other factors such as sunlight, prey size, shape, and movement behavior influence the perception of shiny animals.</p>



<p>So, next time you see a pop star shine on stage, or even a glistening insect out in the wild, remember there’s more to their shimmer than meets the eye.</p>



<p>The study is published in the journal <em><a href="https://www.cell.com/current-biology/abstract/S0960-9822(24)01334-4" target="_blank" rel="noreferrer noopener">Current Biology</a></em>.</p>



<p>-----</p>



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Shiny animals outwit predators with optical illusions

Who doesn't love a bit of sparkle? We've seen it...

<p>We've all been told that a good night's sleep can do wonders. And indeed, who can deny the refreshing feeling that comes after a great sleep session?</p>



<p>Yet, the intricate processes that unfold in our brains while we're catching some z's are still shrouded in mystery. </p>



<p>The intriguing world of sleep studies is seeing some fresh revelations, thanks to the efforts of researchers at <a href="https://www.rice.edu/" target="_blank" rel="noreferrer noopener">Rice University</a>, Houston Methodist’s Center for Neural Systems Restoration, and Weill Cornell Medical College.</p>



<h2 class="wp-block-heading" id="h-a-journey-of-discovery-begins">A journey of discovery begins</h2>



<p>The main purpose of the study was to shed light on the elusive neural mechanisms that enhance cognitive performance during nonrapid eye movement (<a href="https://www.earth.com/news/sleep-reboots-the-brain-making-room-for-new-memories/" target="_blank" rel="noreferrer noopener">NREM</a>) sleep.</p>



<p>This is the kind of sleep you experience when you're taking a quick nap, nothing too deep. </p>



<p>The results of the research could potentially change our understanding of how sleep sharpens our brain and might even open new avenues in treating sleep disorders and identifying methods to enhance cognitive and behavioral performance.</p>



<h2 class="wp-block-heading" id="h-unraveling-the-magic-of-sleep">Unraveling the magic of sleep</h2>



<p>The researchers began their investigation by studying the <a href="https://www.earth.com/news/mixed-emotions-linked-to-unique-brain-activity/" target="_blank" rel="noreferrer noopener">neural activity</a> of multiple brain areas in macaque monkeys.</p>



<p>They examined the brain activity of these animals as they performed a visual discrimination task before and after a 30-minute NREM sleep period.</p>



<p>To ensure the animals were indeed sleeping, the team used polysomnography, a method that measures brain and muscle activity.</p>



<p>The results were fascinating. The visual task performance of the animals improved post-sleep and showed enhanced accuracy.</p>



<p>This improvement was found only in the macaques who actually fell asleep - those that remained awake didn't see the same performance shift.</p>



<h2 class="wp-block-heading" id="h-a-deeper-dive-into-sleep-s-magic">A deeper dive into sleep’s magic</h2>



<p>The effects of sleep on neural activity in the macaques were described by Dr. Natasha Kharas, the study's first author. </p>



<p>“During sleep, we observed an increase in low-frequency delta wave activity and synchronized firing among neurons across different cortical regions," noted Dr. Kharas.</p>



<p>"After sleep, however, neuronal activity became more desynchronized compared to before sleep, allowing neurons to fire more independently. This shift led to improved accuracy in information processing and performance in the visual tasks.”</p>



<h2 class="wp-block-heading" id="h-the-power-of-simulating-sleep">The power of simulating sleep</h2>



<p>In their relentless pursuit of understanding sleep's magic, the researchers went a step further. </p>



<p>They replicated the neural effects of sleep through low-frequency electrical stimulation of the visual cortex in macaques that were awake.</p>



<p>In this way, specific patterns of stimulation could potentially be used to mimic the cognitive <a href="https://www.earth.com/news/consistent-sleep-slows-down-aging-at-a-cellular-level/" target="_blank" rel="noreferrer noopener">benefits of sleep</a>.</p>



<h2 class="wp-block-heading" id="h-restorative-effects-of-sleep">Restorative effects of sleep</h2>



<p>The implications of the replicated sleep effects are game-changing.</p>



<p>The results hint that the restorative and performance-enhancing effects of sleep could potentially be achieved even without actual sleep.</p>



<p>“The ability to reproduce sleeplike neural desynchronization in an awake state opens new possibilities for enhancing cognitive and perceptual performance in situations where sleep is not feasible - such as for individuals with <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> or in extenuating circumstances such as space exploration,” stated  Valentin Dragoi, the study's co-author.</p>



<h2 class="wp-block-heading" id="h-deepening-our-understanding-of-sleep">Deepening our understanding of sleep</h2>



<p>According to Dragoi, the study is unique as it not only deepens our understanding of sleep's role in cognitive function but also breaks new ground by showing that specific patterns of brain stimulation could substitute for some of the restorative effects of sleep.</p>



<p>“We have uncovered a surprising solution that the brain employs after sleep whereby neural populations participating in the task reduce their level of synchrony after sleep, despite receiving synchronizing inputs during sleep itself,” explained Dragoi.</p>



<p>This revelation highlights how NREM sleep effectively 'boosts' cognitive function by resetting neural activity.</p>



<p>“Our study not only deepens our mechanistic understanding of sleep’s role in cognitive function but also breaks new ground by showing that specific patterns of brain stimulation could substitute for some benefits of sleep, pointing toward a future where we might boost brain function independently of sleep itself,” said Dragoi.</p>



<h2 class="wp-block-heading" id="h-broader-implications-of-the-research">Broader implications of the research </h2>



<p>This fascinating study opens exciting possibilities for practical applications in various fields.</p>



<p>From improving cognitive performance in individuals with sleep disorders to optimizing productivity in high-stakes scenarios, such as military operations or space exploration, the potential is vast. </p>



<p>Additionally, the ability to simulate sleep's effects could pave the way for innovative therapies for neurodegenerative diseases and mental health conditions, where <a href="https://www.earth.com/news/children-who-watch-screens-in-bed-have-the-most-disrupted-sleep/" target="_blank" rel="noreferrer noopener">disrupted sleep</a> plays a significant role. </p>



<p>As research progresses, integrating these findings into wearable technology or non-invasive devices could make cognitive enhancement accessible and customizable for everyday use.</p>



<p>The full study was published in the journal <em><a href="https://www.science.org/doi/10.1126/science.adr3339" target="_blank" rel="noreferrer noopener">Science</a></em>.</p>



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