If you thought the mass extinction caused by the Chicxulub asteroid impact 65 million years ago was bad, think again. Travel back in time even further to around 250 million years ago, and the ...

A few fossilized body parts hinted at an enigmatic bird's close ties to waterfowl like ducks and geese. A newfound skull may bolster that idea.

About 250 million years ... largest of the many mass extinctions that have struck the planet. The most famous die-off ended the reign of the dinosaurs 65 million years ago between the Cretaceous ...

The end of the Permian Period (252 million years ago) saw yet another mass extinction event, wiping out around 96% of all marine life. But a handful of shark lineages persisted. By the Early Jurassic ...

Discover what the prehistoric world was like and how it changed between when dinosaurs first appeared and the mass extinction at the end of the Cretaceous Period. Non-bird dinosaurs lived between ...

Mass extinctions are very important to how life evolved on Earth. For example, when an asteroid hit the Earth 66 million years ago, the resulting dinosaur extinction led mammals to... Researchers ...

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 ... Starting around 145 million years ago, this ...