Researchers discovered that a 215-million-year-old reptile started life on four legs and switched to two as an adult.

There’s something profoundly captivating about the phrase “lost to time.” Throughout history, countless treasures, cities, and secrets have vanished beneath layers of earth, sand, and water—or simply ...

Three tiny Purgatorius teeth found in Colorado are helping scientists trace how early primates evolved and spread across North America.

Sonselasuchus cedrus, discovered in fossils from Arizona, was a crocodile relative from the Triassic period that grew into an ...

Imitation may be the sincerest form of flattery, but the dinosaurs and pseudosuchian archosaurs reached this shape ...

Their species name is well known, but until recently we’ve understood very little for certain about Homo habilis. Columnist ...