The human body can go faster in the 100-meter dash and the 50-meter freestyle. But to reach full potential, our technique must be perfect.

Although H5N1 and its relatives can cause mild disease in some animals, these viruses are more likely to infect brain tissue than other types of flu.

Editor in chief Nancy Shute discusses the quest for solutions in challenges such as childhood malnutrition, Andean bear conservation and assessing AI’s cognition.

An analysis of samples from three Florida landfills shows that landfill gas can carry more PFAS than the liquid that leaches from the waste.

There’s a larger takeaway from some social media content about hormonal birth control side effects: People aren’t getting the information they need.

The southern hemisphere’s ionosphere experiences about 23 space hurricanes per year, which is on par with the northern hemisphere.

Exposing zebra finch eggs and hatchlings to traffic noise can lead to lifelong reductions in health and reproduction, Jonathan Lambert reported in “Traffic ...

Assessing whether large language models — including the one that powers ChatGPT — have humanlike cognitive abilities will require better tests.

H5N1 turning up in cow milk was a big hint. The virus circulating in U.S. cows can infect the mammary glands of mice and ferrets, too.

Birthing and caring for a newborn can be hard on a mother’s bones. Estrogen, which helps regulate bone growth, drops precipitously after birth, and lactation saps the skeleton of calcium. Yet nursing ...

A new technique for probing the 3-D structure of ancient DNA may help scientists learn how extinct animals functioned, not just what they looked like.

The book provides an exhaustively reported primer on the world’s water problems and dives into potential fixes, including agricultural remedies, policy changes, tech innovations and at-home solutions ...