About 250 million years ago, at the end of the Permian period, something killed some 90 percent of the planet's species. Less than 5 percent of the animal species in the seas survived. On land ...

Stanford scientists found that dramatic climate changes after the Great Dying enabled a few marine species to spread globally ...

A new study reveals that Earth's biomes changed dramatically in the wake of mass volcanic eruptions 252 million years ago.

After Earth's worst mass extinction, surviving ocean animals spread worldwide. Stanford's model shows why this happened.

the oldest known member of a group of extinct animals known as the gorgonopsians. These are prehistoric mammal relatives that lived during the Permian period (around 299-252 million years ago ...

“These were predatory animals that fed on fishes and other ... of body sizes that they did during the earlier days of the Permian period. Some of the temnospondyls were small and fed on insects ...

The period of time before the Triassic was called the Permian. This was a time when a wide variety of animals lived, including a group of animals called the synapsids, which would later evolve ...

Though these animals predated the dinosaurs ... forming a protective layer,' Ronchi added. The Permian period lasted from 299 million to 252 million years ago. During this time, the global ...

Among them were the chordates, to which vertebrates (animals with backbones ... survived until the mega-extinction that ended the Permian period 251 million years ago. A predator of the Cambrian ...

Nobu Tamura/Wikimedia Commons The Triassic Period (252-201 million years ago) began after Earth's worst-ever extinction event devastated life. The Permian-Triassic extinction ... a group of animals ...