Research uncovers crucial coupling mechanism between neuronal activity and mitochondrial function in aging mice, revealing potential pathway to combat age-related cognitive decline. Enhancing this mechanism improves cognition in aged mice, highlighting its potential as a therapeutic target.
Lenacapavir's remarkable efficacy has been demonstrated in clinical trials, achieving 100% protection in African adolescent girls and women and 99.9% in gender-diverse groups. The drug's capsid-targeting mechanism blocks key stages of viral replication, offering a potential game-changer in HIV prevention.
Researchers discuss lifeforms composed of mirror-image biological molecules, also known as 'mirror life', which could evade immune mechanisms and predators, posing significant risks. The authors call for careful consideration and preemption of risks before creation, noting that such organisms would likely cause lethal infection in huma...
A genomic study spanning over 300 genomes reveals that modern humans acquired several Neanderthal genes advantageous for our lineage, including those in skin pigmentation, immune response, and metabolism. The study also found rapid natural selection of Neanderthal ancestry within 100 generations after gene flow.
A recent study revealed that a 2014-2016 Pacific marine heatwave wiped out over half of Alaska's common murre seabirds, marking the largest documented vertebrate die-off linked to warming oceans. The loss of 4 million birds is attributed to intense climate impacts, with no evidence of population recovery since.
Thyrotropin-releasing hormone (Trh) plays a crucial role in zebrafish hatching by activating a transient neuroendocrine circuit. The hormone stimulates the release of enzymes that break down the chorion, initiating hatching.
A single mutation in the bovine H5N1 virus can switch its receptor binding from animal-type to human-type receptors, increasing the risk of transmission and potential pandemic. The study highlights the need for continuous surveillance of emerging mutations.
A new meta-analysis reveals climate change is reshaping ecosystems and biodiversity globally, altering species distributions and interactions. Under current temperatures, 1 in 20 species will be at risk, with extinction risks escalating sharply beyond this, including 14.9% at 4.3°C
The AAAS Annual Meeting will take place in-person in Boston from February 13-15. The event features a range of press events, including a Science Trends Media Briefing and a Press Lunch with Experts, offering opportunities for journalists to engage with science professionals and stay up-to-date on the latest news and trends.
Researchers discover two distinct patterns of bipedalism among Pleistocene hominids in East Turkana region, suggesting contemporaneous use of lake habitats by different species. The findings provide evidence for the co-existence of multiple hominid lineages and challenge previous inferences based on fossil dates.
A new study by Killian McLoughlin and colleagues reveals that moral outrage evokes more sharing of misinformation on social media. Outrage-driven posts can spread misinformation as strongly as trustworthy news, with people sharing them without verifying accuracy.
The United Nations has recognized the significance of agriculture in addressing climate change through its value chain approach. Small businesses play a crucial role in supporting small- and medium-sized farms by providing resources, training, and loans, leading to 'climate smart' practices.
During winter hibernation, thirteen-lined ground squirrels reduce the activity of neurons in circumventricular organs, suppressing their sensitivity to physiological cues for thirst. This adaptation enables them to survive for months without drinking, despite their bodies crying out for water.
Researchers mapped global ship traffic and whale habitats to identify 92% overlap, pinpointing high-risk areas for collisions that kill whales. Expanding management efforts to 2.6% of the ocean could significantly reduce these fatalities, aiding conservation efforts.
Researchers found that populations with higher genetic connectivity exhibited more complex foraging behaviors, suggesting intergroup exchange of innovations. This suggests that cumulative culture may evolve faster in species with increased mobility and social networks.
Researchers have identified chloronitramide anion, a previously unknown contaminant produced by inorganic chloramines, in millions of Americans' tap water. The compound's toxicity remains untested, prompting concerns about the safety of chloramine in public water supplies.
A new study directly measures the hearing range of minke whales, revealing they can detect high-frequency sounds as high as 90 kHz. This discovery suggests baleen whales may be more impacted by ocean noise than previously thought and highlights the need for clearer thresholds to measure their sensitivity.
The Evo model can generate DNA sequences up to whole-genome scale with unparalleled accuracy, enabling the design of complex biological systems. It achieves high accuracy in predictive and generative tasks, grasping intricate coevolution between coding and noncoding sequences.
New research led by Andrija Sente uncovers the atomic structure of GABA <sub> A </sub> receptors, revealing unique subunit combinations that create previously unrecognized receptor types. These findings highlight the need to account for variations in drug development to avoid unintended binding sites.
The FDA is advancing alternative methods, such as in vitro ocular irritation tests and computational models, to reduce animal use in product safety assessments. These new approaches have been validated and adopted by the agency, leading to more effective regulatory decisions.
A new study reveals that industrial air pollution can trigger ice formation in supercooled clouds, reducing cloud cover and increasing regional snowfall. This phenomenon could help improve climate modeling and mitigation strategies.
A machine learning study predicts that global plastic waste could double by 2050 without intervention, but a combined policy approach could cut mismanaged plastic waste by up to 91% and decrease emissions by a third. The UN treaty negotiations provide a crucial blueprint for tackling the plastic crisis.
The 2024 AAAS Kavli Science Journalism Awards honored journalists for their immersive stories on scientists, physicians, and the human body. Winners included Simar Bajaj for a profile on gun violence prevention and Kate Evans for her piece on the red-billed gull's decline.
A recent study found that mechanoreceptors known as C-LTMRs play a crucial role in the wet dog shake response in mice. These receptors are connected to spinoparabrachial neurons, which transmit sensory signals to the brainstem, leading to the characteristic rapid body twists.
A new study found that COVID-19 travel restrictions and social measures reduced seasonal influenza cases globally, but allowed certain lineages to persist in tropical regions with fewer restrictions. The spread of influenza is closely tied to social behavior and air travel, which was severely impacted by the pandemic.
Researchers found that disrupting the hepatic vagus nerve restored balance to both liver and brain circadian clocks, leading to reduced overeating behavior in mice. Severing the nerve alleviated overeating caused by deleted clock genes, suggesting a key role for this neural link in obesity.
Researchers have introduced a novel Janus channel of membranes (JCM) system that can simultaneously separate oil and water from complex emulsions. The system achieves impressive separation performance, with oil recovery of around 71% and water recovery of roughly 94% – both exceeding 99% purity.
A recent study found that early-life sugar restriction can protect against diabetes and hypertension later in life. The research, using post-World War II data from the UK, suggests that exposure to sugar rationing during the first 1000 days of life can lower the risk of chronic diseases by about 35% for diabetes and 20% for hypertension.
Researchers discovered a single key enzyme, ALDH3A2, fine-tunes red and yellow pigments in parrots' plumage, controlling the balance of hues. This simple mechanism offers insight into the rapid evolution of diverse colors in parrots, a process driven by a single gene with a large effect.
Researchers found that echolocating bats create detailed mental acoustic maps of their surroundings, allowing them to navigate over several kilometers. The study also showed that bats use both echolocation and vision to improve navigation performance.
Research suggests that Indigenous population expansion and cultural burning practices led to a 50% reduction in shrub cover in southeast Australia, limiting wildfire intensity. Reintroducing these practices could curb future fires.
Exposure to widely used agrochemicals at sublethal concentrations disrupts insect behavior, physiology, and long-term ecological harm. This finding highlights the need for comprehensive pesticide assessments beyond lethality.
Researchers studied a newly identified species of tardigrade to gain insights into its ability to withstand radiation. The study found that the animal's robust DNA repair capabilities and expression of specific proteins protect it from radiation damage, offering potential inspiration for promoting human health.
US wildfires have surged in growth rates over the last 2 decades, with fast fires accounting for 89% of structures damaged or destroyed. These rapid-growing fires present significant challenges to evacuation efforts and firefighting operations, resulting in greater loss of life and infrastructure damage.
A new predictive model estimates that up to 95 million Americans may rely on contaminated groundwater for drinking water before treatment. This highlights the need for increased monitoring and awareness of Per- and polyfluoroalkyl substances (PFAS), which are linked to adverse environmental and health effects.
Research reveals climate-driven wildfires in extratropical forests are now the leading source of global fire emissions. Extratropical regions have surpassed tropical areas in contributing to fire-related carbon emissions, highlighting the urgent need for addressing emissions and safeguarding forest carbon sinks.
Researchers developed a new method to capture complex mixtures of organic chemicals in blood, finding that many pregnant women carry a mixture of neurotoxic chemicals. The study revealed that these mixtures can act additively to produce harm, even at concentrations below individual chemical thresholds.
A new study shows that an AI tool can help people with different views find common ground by producing statements that convey the majority opinion while incorporating minority perspectives. Participants preferred and rated these outputs as more informative, clear, and unbiased compared to those written by human mediators.
Research studies examine global conceptualizations of democracy, partisan animosity, and AI-assisted deliberation to improve democratic attitudes. Findings provide a clearer framework for defending democratic norms worldwide and highlight effective strategies for reducing partisan hostility and anti-democratic attitudes.
A new synthesis reveals one-third of crucial animal-plant interactions are at high risk, threatening European plant populations. Conservation efforts could target these high-concern disperser relationships to preserve biodiversity.
Repeated droughts could cause Galápagos finches to change their song patterns, which might lead to the formation of new species. The study found that males didn't recognize songs from beaks grown under future drought scenarios, suggesting a pathway for ecological speciation.
Understory plants in European temperate forests have shifted their ranges westward over decades, with a stronger connection to nitrogen deposition than climate change. Westward shifts were more likely than northward ones and colonized areas along the east-west axis were closely related to nitrogen and sulfur deposition rates.
A recent study discovered microscopic mucus tails on marine snow particles, which significantly alter estimates of carbon sequestration in the deep sea. These 'tails' slow particle descent into the upper ocean layers, doubling their residence time and impacting carbon transfer and storage.
A 2023 study by Guess et al. examined the effect of social media feed algorithms on attitudes and behavior in an election campaign. However, a subsequent eLetter highlights that temporary changes to Facebook's news feed algorithm may have impacted the study's results.
Laura Seeholzer's groundbreaking research reveals that neuroendocrine cells in the larynx and trachea play a crucial role in protecting our lungs from foreign agents. By detecting water and acid, these cells trigger protective responses, including cough-like reflexes and swallowing motions.
A recent Supreme Court ruling could strip federal protections from nearly all US nontidal wetlands, including 17.3-90 million acres, due to narrow interpretations of WOTUS. The ruling's impact on the environment and economy is uncertain, with potential hotspots in the Southeast and Great Plains.
Researchers present a novel method to remove and store atmospheric carbon using 'wood vaults', potentially reducing fossil fuel emissions. The approach could sequester up to 10 gigatons of CO2 annually, with an estimated initial cost of $100 to $200 per ton.
A new study found that large-scale removal of discarded fishing gear and plastic debris in the Northwestern Hawaiian Islands significantly reduced entanglement rates of endangered Hawaiian monk seals. The findings suggest that marine debris cleanup programs are successful and that reducing plastic inputs can maximize conservation outco...
European atmospheric blocking has slowed glacial melt at Greenland's Nioghalvfjerdsfjorden Glacier by cooling subsurface waters from 2018 to 2021. The findings highlight the importance of regional atmospheric dynamics in glacier stability, which is crucial for predicting future glacier behavior.
A new reconstruction of Earth's temperature history over the past 485 million years reveals a wider range of climate variability than previously understood. The study suggests that atmospheric carbon dioxide has been the primary driver of climate changes during this period, with temperatures varying more dynamically than thought.