First study to explore how ancient reptiles spread across the Earth after the end-Permian mass extinction. New research ...

Iridium is relatively rare in Earth's crust but is more abundant in stony meteorites, which led the Alvarezs to conclude that the mass extinction was caused by an extraterrestrial object.

The Earth is rapidly warming, and similar climate upheavals over 300 million years ago once triggered massive fluctuations in ...

When “Jaws” debuted in U.S. theaters 50 years ago today, it helped launch a new era in American movies. Steven Spielberg’s ...

Humans have driven sharks and their cousins to the brink of extinction. The health of the entire ocean is at stake.