The Triassic Period was a time of great change ... when the archosaurian reptiles, which includes the dinosaurs, came to dominate.' The cause of the Permian-Triassic extinction event is not fully ...

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 ...

The number of dinosaurs may have been stable before the asteroid impact, despite evidence that species were getting less ...

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.

The idea that dinosaurs were already in decline before an asteroid wiped most of them out 66 million years ago may be ...

A new study reveals that Earth's biomes changed dramatically in the wake of mass volcanic eruptions 252 million years ago.

Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing ...

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 ...

Dinosaurs are the extinct relatives of birds that roamed the lands and seas of ancient Earth. They first appeared around 240 million to 230 million years ago in the Triassic Period, and went ...

Indeed, the earliest mammal we are currently aware of is the Brasilodon quadrangularis – a diminutive critter described as ...

A total of 32 US states pump oil, but just over 42 percent of the country’s crude oil production comes out of Texas, ...