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

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

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

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

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

While preparing to build a power substation next to a Utah residential subdivision, a prehistoric field of dinosaur and other ...

Dozens of amphibians perished together on an ancient floodplain around 230 million years ago, according to a study published ...

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