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Global fertility in 2023 sat just 3 percent above replacement level, an American Enterprise Institute report argues, with East Asia now below one birth per woman and over 50 countries recording more deaths than births.
Tracking 75 patients recovering from psychosis, researchers found the inflated expectation of an unstable world eased as delusions lifted, and clung to persecutory beliefs above all, hinting at a treatment target dopamine drugs miss.
Nearly 250,000 comments poured into FDA dockets on proposed menthol-cigarette and flavored-cigar restrictions. A new analysis finds that most were form letters, many carrying content linked to tobacco-company campaigns.
A survey experiment with 100 MPs found that they underestimated support for four climate policies, even when costs were made explicit. MPs who thought an environmental pricing policy lacked support said they were less willing to defend it, but a polling-based correction had uncertain effects.
At CERN, physicists smashed oxygen and neon nuclei together at nearly the speed of light. The way the wreckage spread out differed between the two, and the difference tracks the shapes the nuclei are thought to hold inside: a tetrahedron for oxygen, a bowling pin for neon.
Human brain tissue grown from stem cells kept maturing in culture for more than five years, following roughly the same timetable as a real brain. Chemical marks on its DNA recorded how long it had been growing, and older cells remembered which developmental steps they had already completed.
A national survey of 186,823 US adults finds serious cannabis use disorder rising from 2021 through 2024 in men, women, and most age brackets, while serious alcohol use disorder stayed flat or fell. The sharpest jumps came in middle age and beyond.
An injection primes the immune system, then nanoparticles applied vaginally pull immune defenders to where herpes enters. In mice, 80 percent showed no disease for six months, versus 40 percent with the shot alone. Human trials remain distant.
A gel-coupled transducer, no incision and no drug, revved the drainage plumbing of a stroke-injured rodent brain, routing red-cell residue to neck lymph nodes and lifting survival to five in six from half.
Across 13 experiments and nearly 8,000 trials, four leading AI models read character from faces the way humans do, favoring competent-looking candidates for real jobs and casting suspicion on untrustworthy-looking strangers. Newer models showed more bias, not less.
A decade-old claim that conspiracist thinkers endorse mutually exclusive theories at once was fading. A Bayesian reanalysis of nearly 8,600 people, plus a new experiment, revives it, and pins the effect on two mechanisms.
A wave-powered robot heard dolphins whistle near shore and click more often where sound-producing fish were present. The pattern could help identify social and foraging habitat, but the recordings cannot show which dolphin species were involved or prove what either animal was hearing.