Until now, it’s been very hard for scientists to establish a detailed timeline of the early evolution of bacteria.

Paleontologists found a group of four-legged Triassic creatures preserved in the same bone bed—but they don’t know what ...

The discovery of nearly 20 alligator-size amphibians that died together during the Triassic in what is now Wyoming is ...

For decades, the prevailing theory behind the mass extinction that ended the reign of the dinosaurs has pointed to a ...

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 ...

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

Scientists racing the clock to finish excavating top southern Utah dinosaur fossil site before construction on a power ...

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.

Scientists don't call it the "Great Dying" for nothing. About 252 million years ago, upward of 80% of all marine species ...