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.

If you thought that crocodiles were menacing enough, be glad that you didn’t live in Arizona some 225–201 million years ...

A new species of ancient reptile has been named after spending more than 200 million years buried in the ground. Threordatoth chasmatos was one of the last survivors of the procolophonids, a group of ...

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

Paleontologists have found a fossilized pterosaur precursor with gnarly, scimitar-like claws and a beak, indicating that the reptilian group it belongs to was more diverse than previously thought. The ...

PHOENIX — A Triassic reptile species discovered at Petrified Forest National Park in Arizona was named after a former park superintendent and his wife in the peer-reviewed scientific article that ...

The Triassic period represents a pivotal chapter in Earth’s history, marking not only the recovery from the Permo‐Triassic mass extinction but also a remarkable burst in marine reptile diversity.

Technological advancements have brought us many things. For paleontologists, it’s introduced the ability to probe softer material—skin, feathers, scales, and hair—found on fossilized creatures. And ...

The largest and most diverse group of Triassic aquatic reptiles gave birth to live young, researchers recently reported. 1 The finding represents the first evidence of viviparity in sauropterygians, ...

Had a volcano-driven mass extinction not occurred at the end of the Triassic 201 million years ago, we likely would have had something closer to an Age of Crocodiles than the Age of Dinosaurs that ...

A series of fossilized footprints linked to a Triassic-era reptile have been stolen from a Utah national park. The incident is being investigated as an act of vandalism and the theft of “irreplaceable ...