Old” pacemakers may still work for years, so doctors are refurbishing used devices and donating them to patients in low- and middle-income countries.

Earthen channels directed fish into ponds that formed seasonally, providing a dietary bounty for Maya civilizations starting around 4,000 years ago.

Earth’s space junk may be wreaking havoc on the stratosphere. The rapid surge in satellite megaconstellations is connecting much of the world to broadband internet. But each year, hundreds of ...

Chlorine-based water treatments create many by-products, but one has been elusive. Its identification sets the stage for studying its health effects.

A multiyear study of dozens of wild, adult chimps suggests that play helps reduce tension and boost cooperation among individuals.

The first-ever close-up of an extragalactic star looks different than expected and might give a view of what stars look like at the end of their lives.

Every single Atlantic hurricane in 2024 had wind speeds supercharged by warming seas. One even jumped two categories of intensity.