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Peer-reviewed multidisciplinary journal published by the U.S. National Academy of Sciences, covering biological, physical, and social sciences.
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Illinois physicists report the first direct evidence that pair density waves in uranium ditelluride outlive superconductivity, as a 2007 theory predicted. If the result holds, electrons in this metal pair up before superconductivity sets in, though so far the evidence covers only one material.
Reality
Max Planck researchers report in PNAS that sunlight-strength lasers had no measurable effect on how fast pure water evaporates. The extra evaporation seen in earlier gel and droplet experiments now needs a different cause.
Reality
Chinese Academy of Sciences scientists found gamma-iron, never before seen in natural lunar material, as the main iron in two Chang'e-6 impact-glass samples. The mineral is a new candidate recorder of the Moon's lost magnetic field, though the team says further work must show how much it can reveal.
Reality
UC Berkeley's Kirk Bansak and Nidhi Banavar report in PNAS that most of nearly 3,800 participants skipped weighing every attribute of political choices. Because every attribute was on screen, the result concerns how people use information they already hold.
Reality
Scripps Research built a synthetic protein that binds TLR4 inside the cell membrane and lowers its inflammatory signaling. No FDA-approved drug specifically blocks the receptor, whose membrane-spanning region was long treated as a passive anchor.
Reality
Tatiana Davydova's team scanned 151 bilinguals in Castelló and found naming an emotion damped amygdala activity only in a dominant native language. For people equally fluent in two languages it failed in both, so a well-known way to calm emotion now comes with a language condition.
Reality
UC Santa Cruz researchers used copepod alarm chemicals to forecast toxic mussels seven weeks ahead, against one week for models tracking the toxin itself. That long warning covered 22% of high-toxin events at a single Monterey Bay wharf, about one in five.
Reality
Henriette Zeidler's team tested 336 children aged 4 to 9 in six societies and found peer helping in every one, most often when help was truly needed. Their PNAS paper extends to peers a field that has mostly studied children helping adults, often within the family.
Reality
Researchers reporting in PNAS priced the full cycle of forming and reviving a Bacillus spore at nearly 10 billion ATP molecules. They argue that bill explains why well-fed lab strains lose the ability within a few thousand generations.
Reality
Natural History Museum and Oxford researchers matched the timing of more than 6,000 Nigerian Lassa cases using rainfall and nearly 30 years of rodent data. Because the model runs on weather and rodent ecology, health authorities could use it to anticipate when the risk of spillover to people climbs each season.
Reality
University of Missouri researchers report that bullfrog brains make ketone bodies in their own tissue when glucose runs low, a job textbooks give the liver. Any use against stroke or Alzheimer's in people rests, for now, on the argument that frogs and humans share core metabolic pathways.
Reality
University of Hawai'i researchers found antimony nearly 40 times US biomonitoring levels in 1,400 Maui adults up to 18 months after the 2023 fires. Residents with higher metal loads were more likely to show abnormal lung function on standard breathing tests, long after the burning had stopped.
Reality
Researchers found spiny water flea DNA in Ontario lake mud dating to 1867, over a century before its accepted 1980s arrival by cargo ship. That weakens the cargo-ship account, but the dated evidence is from Muskoka and leaves open whether the flea is native.
Reality
Ohio State researchers filmed wild sooty mangabeys climbing thin trunks in Ivory Coast. The measurement removes ankle anatomy as a clean way to sort what the human-chimp ancestor did in trees.
Reality
An MIT-led team reports remanent magnetization in calcium-aluminum-rich inclusions from an Antarctic meteorite, pushing the earliest known nebular field ten times closer to time zero.
Reality
Harvard Medical School researchers found that a virus fusing with a cell ruptures the nucleus, spilling host DNA that trips the cGAS alarm within an hour. The team says the work could inform how viral-vector gene therapies and vaccines are designed.
Reality
Researchers scoring Portland on more than 100 environmental and health indicators found its worst-off neighborhoods often lie outside 1930s redlined zones. Tree planting or health spending steered only by the old HOLC lines would pass over those places.
Reality
MIT researchers found magnetic traces in meteorite grains from the solar system's first 200,000 years that point to a field stronger than Earth's today. That places magnetism in the nebula while the sun was forming, though how much of the collapse it drove is still an estimate.
Reality
Stowers Institute scientists fed AlphaFold2 new aphid genomes and got about 2,400 structures of plant-hijacking proteins built on one reworked fold. Two X-ray structures anchor those predictions. What the proteins do inside a plant is still unknown.
Reality
BrainGate researchers found motor cortex firing in two people with tetraplegia was strongest for a photorealistic hand and weakest for an abstract cube. The ordering bears on how assistive devices are shaped, though nobody was controlling anything during the recordings.
Reality
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