Researchers examined small fossilized limb bone fragments from marsupial and placental mammals in Western North America.

More mammals were living on the ground several million years before the mass extinction event that wiped out the dinosaurs, ...

More mammals were living on the ground several million years before the mass extinction event that wiped out the dinosaurs, ...

It’s always unfortunate when a species goes extinct. This tragedy usually happens over a prolonged period, but certain events ...

After the end-Permian mass extinction, certain species thrived in warmer, oxygen-depleted waters, spreading globally. This ...

Fossils from China’s Turpan-Hami Basin reveal it was a rare land refuge during the end-Permian extinction, with fast ...

They show the gritty side of dinosaur life,” Lacovara said. “Dinosaurs were authentic beings that lived under their own ...

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

Stanford scientists found that dramatic climate changes after the Great Dying enabled a few marine species to spread globally ...

After Earth's worst mass extinction, surviving ocean animals spread worldwide. Stanford's model shows why this happened.

Supernovas, the explosive deaths of massive stars, could have had a devastating impact on Earth's atmosphere, leading to mass ...