Tissue-targeting antibodies have been a key suspect in long COVID. Now, two studies show that antibodies from patients can cause symptoms in mice.

Radiocarbon from bomb tests reveals that plants store more carbon than previously estimated in leaves and stems, which are vulnerable to degradation.

Hydrogen bonded with sulfur may have given our world its first water after the hydrogen broke away and joined with oxygen in the planet’s crust.

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.

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.

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 rare find, discovered in the star cluster Omega Centauri, could offer clues to how black holes and galaxies evolve.

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.

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

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 ...

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.