A class of AI systems with advanced planning capabilities poses an existential risk, requiring new forms of government intervention. Existing regulatory approaches and empirical safety testing may not be sufficient to mitigate this risk.
Promoting livestock biodiversity and soil conservation strategies provides both social and environmental benefits. Diversified agriculture can mitigate simplified agriculture's negative impacts, including increased chemical use, water pollution, and biodiversity loss.
Researchers have discovered that mechanical damage caused by asthma attacks can lead to inflammation and mucus production. New treatments targeting the root cause of airway constriction may offer a more effective approach to managing asthma.
A new study by Abebe Fromsa and colleagues found that the BCG vaccine reduces disease transmission by 89%, with consistent vaccination likely bringing the disease under control within a few decades. The results suggest that BCG vaccination could be used to substantially eliminate bovine tuberculosis in the Ethiopian dairy sector.
A new survey reveals that US landfills are emitting substantial amounts of methane, a key contributor to global warming. The study found that point-source emissions account for a significant proportion of total emissions, with some landfills experiencing persistent activity for months or even years.
Researchers used bioluminescent oxygen indicator to track pO2 changes in mouse cortical astrocytes, finding transient hypoxic pockets that lasted several seconds to minutes and decreased with exercise. The findings suggest physical inactivity may directly affect tissue pO2 by favoring capillary occlusions.
Researchers suggest using DOM to assess freshwater chemodiversity and monitor pollution effects on ecosystem health. High-resolution mass spectrometry can help pinpoint pollution sources, including those in drinking water.
A new approach to K-12 mathematics education in the U.S. proposes a modular curriculum that preserves mathematical pathways and possibilities for all students, regardless of STEM orientation. This approach aims to resolve the 'equity versus excellence' conflict and provide richer learning opportunities for children.
A study found that organic fields can help reduce pesticide use on surrounding organic fields by increasing pest control in those areas. Conversely, clustering organic fields together decreases overall pesticide use across both organic and conventional farms by mitigating spillover effects.
Researchers discover a single gene, regucalcin1, that influences visual preference for red wing patterns in Heliconius butterflies. The study reveals how genetic variation affects mate choice and highlights the importance of CRISPR/Cas9 technology in understanding evolutionary mechanisms.
Scientists have overcome multimerization issues by constructing single-copy artificial human chromosomes (HACs) in budding yeast and transferring them into human cells. The newly formed HACs maintain as single-copy molecules, enabling larger DNA structures, potentially advancing genome editing in humans and other organisms.
Direct-to-consumer microbiome testing lacks analytical and clinical validity, according to a Policy Forum article by Diane Hoffman et al. The industry's claims are not substantiated by research, putting consumers at risk of financial exploitation or harm from misinterpreted test results.
Researchers discovered three previously undescribed cellulosome-producing bacteria species in the human gut, abundant in ancient and hunter-gatherer microbiomes but rare in industrialized populations. These bacteria facilitate fermentation of dietary fiber into short-chain fatty acids, supporting host health and gut stability.
Researchers have created a novel method to control long-chain branching in polyethylene under solution-phase conditions, producing a plastic with properties similar to LDPE. The new approach uses dual-chain catalysts and is industrially viable, offering a more sustainable alternative to traditional high-pressure synthesis processes.
Researchers have developed a lead-selenide-based material that improves thermoelectric efficiency without using scarce tellurium. The new material's performance surpasses existing tellurium-based thermoelectric materials in both cooling and electrical conductivity.
BioSUM, a novel device, uses ultrasound to detect pH changes in deep tissues, allowing for early detection of post-operative leaks. The implantable, shape-adaptive sensor enables precise monitoring across various gastrointestinal organs.
An egg-laying caecilian species of amphibian has been found to produce a lipid- and carbohydrate-rich resource, referred to as 'milk', which it feeds to its hatchlings several times throughout the day. This behavior is not known in any other amphibian, providing new insight into the evolution of reproductive strategies.
A new study found that atmospheric carbon dioxide (CO2) drawdown from chemical weathering of rocks is limited to a narrow range of moderate erosion rates. This has significant implications for understanding the constraints of weathering-mediated CO2 drawdown and resolving conflicting data on its impact on the climate.
Global biodiversity change indicators show deepwater sharks and rays are highly sensitive to overexploitation, with one-third targeted for fishing and half threatened with extinction. Implementing worldwide depth limits and no-fishing areas could enhance protection if paired with international regulations.
Conventional supply-side policies overlook benefits of demand-side policy approaches, which can improve energy security through continuity, affordability, and sustainability. A novel analysis by Nuno Bento et al. shows that demand-side actions outperform supply-side approaches in making countries more resilient to energy crises.
A new study found that climate change significantly alters seasonal patterns of river flow worldwide, particularly in high northern latitudes. The research, which combined in situ observations and model predictions, reveals a discernible weakening of the seasonal cycle in rivers above 50° N.
Researchers found that pelagic fish are more strongly impacted by human pressure but also benefit from marine protected areas. The study highlights the importance of increased protection in remote regions to safeguard the world's largest and most endangered pelagic fishes.
A new study directly observes far-ultraviolet-driven photoevaporation of a protoplanetary disk in the Orion Nebula. This process strips the disk of gas and dust, potentially suppressing gas giant planet formation within a million years. The findings provide insights into constraints of gas giant planet formation in our Solar System.
The James Webb Space Telescope has revealed conclusive evidence of a neutron star in the remnant of Supernova 1987A, which was once thought to be a black hole. The observations confirm emission lines from highly ionized gas near the explosion site, indicating intense ultraviolet and X-ray radiation.
Wide-scale forestation efforts may drive warming through changes in atmospheric composition and surface reflectivity, offsetting up to a third of CO2 removal benefits. Tree planting remains an important climate change mitigation strategy when combined with emission reductions.
A new study suggests that teaching genomic concepts in a 'humane genomics education' framework can help students disbelieve genetic essentialism and develop a more nuanced understanding of race as a social concept. The approach has been shown to reduce racist beliefs and promote a more scientifically accurate understanding of genetics.
A study of widely used US high school biology textbooks reveals they often conflate biological sex with sociocultural gender, failing to differentiate between the two. This 'essentialist' approach is inconsistent with established scientific knowledge about sex and gender.
Researchers found that competition pushes zebra ahead of wildebeest, while wildebeest facilitate growth that allows gazelle to follow. Large seasonal migrations in Serengeti National Park are driven by a balance between competitive and facilitative forces.
Researchers found that oxygen availability increased in shallow subsurface waters despite global warming during the Paleocene-Eocene Thermal Maximum. This increase was consistent with predictions from ocean circulation models, which suggest a compensation effect may help explain moderate levels of extinction observed during this period.
Researchers developed cresomycin, a conformally restricted antibiotic molecule that optimizes for ribosomal binding, inhibiting Gram-negative and positive bacteria, including multi-drug resistant strains. The findings portend favorably for the future discovery of antibacterial agents broadly effective against antimicrobial resistance.
Bingxu Liu's research reveals STING as an ion channel that senses danger in mammalian cells, inducing multiple defenses against viruses, bacteria, and tumors. The discovery hints at the adaptability of innate immune proteins like STING, suggesting they have evolved to acquire diverse new functions.
The 2024 winners of the AAAS/Subaru Prize for Excellence in Science Books include titles on nature, ocean floors, and the solar system. The award recognizes exceptional science books that engage readers of all ages.
A massive dike formed beneath Grindavík, Iceland, reaching an unprecedented subsurface magma flow rate of 7400 cubic meters per second. Fracturing and tectonic stress drove the high flow rate, providing insight into dike formation and hazard potential for similar systems.
Researchers identified two types of penile fibroblast cells that mediate vasodilation by reducing norepinephrine availability. Fibroblast proliferation fine-tunes blood flow regulation, stimulating increased erection frequency and elevated basal penile blood flow.
Atmospheric nitrate radicals degrade floral scents, reducing flower visitation by 70% in hawkmoth pollination. Urban areas with high O3 and NO3 pollution levels can also impact global pollination.
Healthcare providers' perceptions of patient preferences drive underutilization of lifesaving oral hydration salts (ORS) in treating childhood diarrhea. Interventions to change these perceptions could increase ORS use and reduce child mortality worldwide.
A new study maps the spatial organization of hippocampal neurons in the mouse brain, revealing previously unknown principles. The researchers created a comprehensive three-dimensional single-cell atlas of the region and its connections, which will aid in understanding the neural circuitry and underlying brain functions.
A meta-analysis of 221 studies finds that megafauna size and dietary selectivity have stronger effects on plant diversity than species origin. This challenges the assumption that introduced megafauna have greater negative impacts on ecosystems.
A computational analysis has highlighted two major sign language families, European and Asian, with distinct subfamilies identified. The study used video dictionary entries of core vocabulary to develop a database of coded sign forms, revealing no evidence of long-term contact between European and Asian sign languages.
A new machine learning model has provided new insights into early language acquisition by analyzing video and audio recordings of a single child over 1.5 years. The model, trained on the child's first-person perspective, showed that it could learn word-referent mappings present in the child's everyday experience.
A new machine learning model helps clarify which waters are protected from pollution under the US Clean Water Act, depending on a court ruling or regulatory interpretation. The model suggests that two-thirds of U.S. streams and half of wetlands may be protected under one rule, while another protects fewer than half of these waters.
Researchers using the H.E.S.S. array observed gamma rays from microquasar SS 433, revealing a shock front that accelerates electrons to high energies. The findings provide insight into how jets reach such high energies and shed light on cosmic ray production.
A study in Kenya's Ol Pejeta Conservancy found that invasive big-headed ants disrupt a mutualism between native ants and acacia trees, leading to overgrazing by elephants and reduced lion zebra kills. As a result, lions shift their prey to African buffalo, reducing zebra kills from 67% to 42% between 2003 and 2020.
A recent study by Megan He and colleagues finds that traditional methods for estimating pollution in the Canadian oil sands can be severely inaccurate, with actual emissions exceeding industry values by up to 6300%. The research highlights the need for more comprehensive monitoring of organic carbon emissions from oil sands operations.
The rapid transition to solar-powered groundwater irrigation in low-and-middle-income countries has led to over 500,000 solar pumps installed in South Asia and Sub-Saharan Africa. However, the benefits of this transition are complex and may come with risks, including increased groundwater extraction and potential depletion of aquifers.
A study of blood samples from patients with Long Covid has identified changes in serum proteins, including dysregulated activation of the complement system and thromboinflammatory responses. These findings suggest potential biomarkers for diagnosis and new treatment strategies warranting further investigation.
Researchers detected a compact object with a mass between 2.09 and 2.71 solar masses, which is at the lower edge of the mass gap between neutron stars and black holes. The discovery has fascinating implications for understanding extremely dense nuclear matter and supernova explosions.
Researchers developed intravenous priming agents that increase the recovery and detection of tumor-derived genetic fragments in liquid biopsies. In mouse models, these agents increased sensitivity for detecting small tumors from 10% to 75%. The approach may boost the sensitivity of liquid biopsies in cancer care and beyond.
Clinical prediction models for schizophrenia treatment outcomes perform poorly on independent trial data, despite high accuracy within their training dataset. The study highlights three key reasons for this limitation, emphasizing the need for more stringent validation methods in machine learning approaches.
A 2500-year-old urban center in the Upper Amazon has been discovered, featuring constructed platforms, plazas, and a complex road network. The site, dating back to around 500 BCE, is significant for its early evidence of large-scale low-density agrarian urbanism in the region.