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Climate change left its signature on the atmosphere early in the industrial revolution, reveals a thought experiment investigation

The June heat dome contributed to the deaths of at least three people. They have died as federal regulators have weighed whether to finalize the nation’s first heat protection rule for workers

When tested on their own and in mice, these bacterial strains from the human microbiome show promise in accumulating PFAS

The future is bright—too bright—for life as we know it once the sun transforms into a red giant star

Adult brains grow new neurons, and scientists have finally pinpointed where they come from

Forty years after the first effort to extract mummy DNA, researchers have finally generated a full genome sequence from an ancient Egyptian, who lived when the earliest pyramids were built

Evidence shows that Medicaid improves people’s health and is particularly vital for babies, older people in need of long-term care and people in rural communities

All eyes are on Comet 3I/ATLAS as astronomers worldwide chase the exotic ice ball through our solar system

Four research firms project that the Republicans’ One Big Beautiful Bill Act will raise greenhouse gas emissions and likely put U.S. and global climate goals out of reach

Breakthroughs from two rival experiments, Germany’s Wendelstein 7-X and the Joint European Torus, suggest the elusive dream of controlled nuclear fusion may be within reach

Canceled grants and slashed budgets are disproportionately affecting junior health researchers, dealing a major blow to the future of science and society in the U.S.

AI could be used to comb through electronic health records and warn vulnerable people about dangerous heat waves

This planet triggers flares on its star—spelling its ultimate doom

Launching in 2028, China’s Tianwen-3 Mars sample return mission could bring Red Planet rocks back to Earth as early as 2031—years ahead of competing U.S.-European efforts

Dolphins seem to “feel” their way across the sea with narrow, sweeping beams of sonar

AI can allow engineers to focus on artistry over technical details for drone shows

Here's a collection of exclusive book recommendations, from slithering snakes to a river's impact, for your summer reading lists, curated by Scientific American

Links to the U.S.’s most comprehensive climate reports—the National Climate Assessments—disappeared from the Internet on Monday, along with the official government website that houses them

GLP-1 drugs currently being tested in China target complications associated with obesity such as heart disease, fatty liver disease and type 2 diabetes

To achieve its ambitious plans for missions to the moon and beyond, Russia needs other spacefaring nations as partners. But the war in Ukraine is making that help increasingly hard to find