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

Paleontologists are marveling over a unique fossil of a specimen that pre-dated the dinosaurs, according to new research.

Buried as they are in the past, scientists and researchers excavating ancient fossils, bones and footprints from a one-acre quarry just north of St. George’s Dinosaur Discovery Site museum are anxious ...

New fossil analysis shows mammals transitioned to terrestrial lifestyles millions of years before the mass extinction—driven ...

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

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

Today’s extinction rates are sky-high. But scientists debate if that’s sufficient evidence to conclude that Earth is undergoing a mass extinction event—or whether that’s even a helpful designation.

Extinction is a natural part of life on Earth. But occasionally, extinction rates have surged far beyond usual levels, driving mass extinction events that have reshaped the trajectory of life. After a ...

It comes after the Jurassic Period and before the Paleogene - the first ... The Cretaceous-Palaeogene extinction 66 million years ago is possibly the most famous mass extinction event. It was caused ...

It was followed by the Jurassic and Cretaceous periods – at the end of the latter, the dinosaurs were wiped out in a mass extinction event along with the majority of all other life. As a period ...