Dinosaurs evolved from more primitive reptiles in the aftermath of Earth's biggest mass-extinction event caused by extreme volcanism at the end of the Permian Period about 252 million years ago.

In a nutshell New research challenges long-held beliefs about dinosaur origins, suggesting they first evolved in Earth’s ancient tropical regions rather than in southern areas where their oldest ...

The most famous die-off ended the reign of the dinosaurs 65 million years ... the terrestrial realm's transition from the Permian to the Triassic period." We ascended through sheep-ranching ...

This also marked the first time the earliest dinosaurs appeared. The Permian period’s mass extinction had wiped out the mammals that could have been competitors for these reptiles on land and in ...

They were the only group of dinosaurs to survive the Cretaceous mass extinction around 65 million years ago (not to be confused with the Permian-Triassic mass extinction that happened some 250 million ...

This not only marked the end of the Permian period and the start of the Triassic ... Alongside these terrestrial vertebrates, the first dinosaurs began to appear. They were mostly much smaller ...

Dinosaurs evolved from more primitive reptiles in the aftermath of Earth's biggest mass-extinction event caused by extreme volcanism at the end of the Permian Period about 252 million years ago.