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

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

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

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

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.

The DESI project previously reported that dark energy — long thought to be constant — changes over time. A new analysis reaffirms that claim.

Phobos and Deimos could have formed from asteroid debris, a new study suggests. An upcoming sample return mission will help test the idea.

Mineral crystals in heart cockles’ shells protect symbiotic algae from ultraviolet rays and could lead to innovations in internet infrastructure.

The behemoth coral, discovered in October in the Solomon Islands, is longer than a blue whale and older than the United States.

Perhaps most importantly, Lucy’s discovery foreshadowed a series of fossil finds that filled in the scientific picture of her species. By 1978, enough evidence had accumulated to establish Lucy as the ...

He didn’t relate when people complained about a movie character looking different than what they’d pictured from the book, for instance. But it wasn’t until he was a teenager that things finally ...