Gut bacteria can acquire genes from neighboring microbes, adding to the genetic differences linked to how people live.

Japanese macaques from groups hit by a deadly outbreak were more likely to avoid food on feces, even if they had never tested ...

Each pregnancy adds biological age that takes months to come off, and birth spacing may decide how much a mother recovers ...

Ancient footprints at White Sands reveal how people returned for nearly 2,000 years as drought and warming transformed an ice age lake.

Engineers built tattoo inks that switch on under UV light and fade indoors, and the inventor has worn the color-changing ...

Fewer than 250 swift foxes remain in Texas. Two dogs are now guarding cattle on the grassland to test whether they can keep ...

A metal detectorist discovered 934 Roman silver coins near Cologne, Germany, uncovering the country's largest known hoard from Hadrian's reign.

Most anti-aging products already count as drugs under U.S. law, a new analysis finds. However, proving that they work at all ...

Ancient algae preserved in Arctic seafloor mud suggest climate models overestimate winter sea ice, pointing to less ice in ...

An AI search of more than 50 million chemicals identified 92 potential sugar substitutes that could deliver sweetness without ...

A crocodile skull from the rock of the Great Sphinx was misnamed for a century. CT scans show where Herugavialis fits among ...

An astronaut photo reveals the San Juan River’s dramatic bends in southern Utah, where an ancient waterway carved deep into a ...