Astronomy

The U.S. has held its measles-free status for more than 25 years. Experts say unrelenting outbreaks in the past year may change that

Spacecraft orbiting the Red Planet have helped researchers map out an ancient coastline that surrounded a large ocean billions of years ago

Spacecraft orbiting the Red Planet have helped researchers map out an ancient coastline that surrounded a large ocean billions of years ago

In rethinking whether AI is sentient, we are asking bigger questions about cognition, human-machine interaction and even our own consciousness

Consciousness researchers studying “islands of awareness” have found that disconnected brains likely sink into a strange form of deep sleep

Extremophile molds are invading art museums and devouring their collections. Stigma and climate change have fueled their spread

Giant atoms; corpses for science

A large dataset shows some dog stereotypes are based in reality, and others might be unfair characterizations

Letters to the editors for the October 2025 issue of Scientific American

The Nobel Prizes remind us how science can unite society and inspire hope for the future

Will brain science deliver answers about consciousness or hit another wall?

The James Webb Space Telescope should soon be able to spot the first generation of stars in space

Science in meter and verse

Motion is the new potion, and rest is no longer the best

Researchers are close to making “reversed” cells that may wipe us off the planet

The many, many ways researchers hope to solve the toughest mystery in science

Pick an unusual winning poker hand in this math puzzle

Play this crossword inspired by the February 2026 issue of Scientific American

Concerns around common sunscreen chemicals have prompted the search for natural alternatives, with lignin from wood being one of the most promising candidates

Concerns around common sunscreen chemicals have prompted the search for natural alternatives, with lignin from wood being one of the most promising candidates