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 ...

The mass extinction that ended the Permian geological epoch, 252 million years ago, wiped out most animals living on Earth.

Witton ( The end-Permian mass extinction, 252 million years ago, was the largest, wiping out up to 90% of species. Researchers have focused on the survivors and their fate in the following Triassic ...