Fossils reveal a small ancient reptile related to crocodiles, Sonselasuchus cedrus, that may have switched from four legs to two as it grew.

Learn how fossils from Arizona’s Petrified Forest National Park revealed that a Late Triassic crocodile relative may have started life on four legs before walking on two as an adult.

A "peculiar" ancient relative of the crocodile which experts believe began life on four legs before, in adulthood, it learned how to walk on just two has been revealed in a new study. Named ...

While the Jurassic Park franchise mainly contains Cretaceous period dinosaurs, going into earlier eras like the Triassic ...

Christian Sidor, Burke Museum curator of vertebrate paleontology and a biology professor at the University of Washington, recounts the discovery of Triassic fossils. (GeekWire Photo / Alan Boyle) More ...

As the great 20th century paleontologist William Diller Matthew once wrote, "The story of life on Earth is a splendid drama, as interesting as we watch its action and study the interplay of causes and ...