Whale sharks are gentle, filter-feeding giants, but orcas in Mexican waters were documented attacking the animals and devouring their livers.

Balloon launches from around the world are part of a new kind of global alarm system: One that can detect if another country tries to dim the sun.

© Tatsiana Chypsanava for The New York Times

Egyptians may have used hallucinogenic substances as part of a fertility rite, researchers said.

Whale sharks are gentle, filter-feeding giants, but orcas in Mexican waters were documented attacking the animals and devouring their livers.

After scientists found an extinct burrowing amphibian on Eastern Shoshone land, members of the tribe gave it a name in their language.

The arthropods can tailor their toxins depending on whether they are hunting prey or defending themselves from predators, according to a new study.

This is your captain speaking: When thunderstorms are in the forecast, you may need to buckle those seatbelts a lot sooner than you’re used to.

© Jonathan Hayward/The Canadian Press, via Associated Press

A discovery in northern Kenya hints that two extinct species that were our ancient relatives shared the same habitat and possibly interacted.

Scientists study the flight of hummingbirds to design robots for drone warfare.

© Timo Lenzen

The agency long benefited from broad bipartisan support. But Republican criticism has intensified, and new choices for top health posts hope to upend the organization.

© Hailey Sadler for The New York Times