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Astronomers are racing to protect the dark skies as private companies seek to place large advertisements in Earth orbit

A tiny, woolly flower found hiding in Texas’s Big Bend National Park shows the intriguing strangeness of sunflowers

A colonoscopy can save your life, but misinformation keeps many people from getting one. A gastroenterologist sets the record straight.

NASA astronauts Butch Wilmore and Suni Williams had been “stuck” at the International Space Station since June 6, 2024, after Boeing’s Starliner, the vehicle they rode to get there, ran into multiple hardware problems

The final results from the Atacama Cosmology Telescope offer the sharpest, most sensitive view of the early cosmos that anyone has ever seen

RFK, Jr. fought mercury pollution for years, but he is now in an administration that wants to make it easier for industries to dump it into the air and water

Mysterious gamma rays; snake-eating snake

Four small, newly discovered worlds are less than six light-years away from Earth, and their discovery reinforces a cautionary tale from planet hunting’s prehistory

Several medications now calm painful inflammation in the intestines. Diets free of ultraprocessed foods also help

In the April issue of SciAm, follow a man’s journey to a diagnosis, learn about exciting new schizophrenia treatments, and more

Letters to the editors for the December 2024 issue of Scientific American

California is experiencing wider swings between wet and dry spells

Writers, artists, photographers and researchers share the stories behind the stories

Science in meter and verse

Artificial Intelligence uses too much energy. Developers need to find better ways to power it or risk adding to the climate crisis

Analyzing the metaphors we use to talk about ChatGPT can reveal how we’re thinking about the new tech

A personal quest and progress in brain science finally put a name on baffling behaviors

Play this crossword inspired by the April 2025 issue of Scientific American

Finish the cycle of numbers in this math puzzle

As a complex picture of schizophrenia emerges, so do new ways to treat the disorder