(CNN) — Fossils of an unusual saber-toothed predator that lived during the worst mass extinction event on Earth are revealing how unstable things were for animals during “the Great Dying.” A series of ...

Therapsids, the ancient relatives of mammals, once roamed Earth in great numbers during the middle to late Permian period. These land-dwelling creatures would later evolve into mammals, but their ...

Christian Sidor is a professor in the UW Department of Biology and curator of Vertebrate Paleontology at the Burke. And for the last 18 years, he’s been traveling back and forth to Zambia and Tanzania ...

Scientists don't call it the "Great Dying" for nothing. About 252 million years ago, upward of 80% of all marine species vanished during the end-Permian mass extinction—the most extreme event of its ...