Dinosaurs get all the glory. But aetosaurs, a heavily armored cousin of modern crocodiles, ruled the world before dinosaurs did. These tanks of the Triassic came in a variety of shapes and sizes ...

Shannon McDonagh is a Newsweek content reporter based in London. Her focus is reporting breaking wire stories across international politics and social issues. She has covered culture, politics and the ...

The Triassic is one of the most important periods in the evolution of life on Earth. After one of the greatest mass ...

Fossil discovered in 1989 found to be new species of aetosaur — a massive armored crocodile cousin that lived during the late Triassic. When you purchase through links on our site, we may earn an ...

It was relatively small compared to the giants that would follow it later in Earth’s history. With a hip height of approximately 0.3 meters (about a foot) and a length of perhaps a meter (roughly ...

The odd structure is distinct from anything seen in living animals and likely created a colorful display Jack Tamisiea A paleoartist’s reconstruction of Mirasaura grauvogeli, an early reptile from the ...

Ancient animals were walking around on bird-like feet over 210 million years ago, according to a new study. Ancient animals were walking around on bird-like feet over 210 million years ago, according ...

Archosauromorphs walked - across a 10,000-mile hellscape - so dinosaurs could run. According to a new study published in Nature Ecology and Evolution, archosauromorphs, early ancestors of dinosaurs ...

A reptile from the Middle Triassic had a spectacular crest made from feather-like structures, around 100 million years before the first feathered dinosaurs. Its remains comprise two fossils with the ...

In Paraíso do Sul in southern Brazil, scientists discovered a fossil of a dog-sized reptile dating back to 237 million years ago. The creature, a newly described species named Gondwanax paraisensis, ...

The mass extinction that wiped out nearly all life on Earth just before the dinosaurs evolved may have been caused by a global temperature drop rather than a rapidly warming climate. The End Triassic ...