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 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 ...

How could these water-loving animals have been so successful ... This extinction event marked the end of the Permian period ...

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 ...

The end-Permian mass extinction occurred around 252 million years ago, and wiped out over 80% of marine species and 70% of terrestrial species due to extreme environmental changes including global ...

The mass extinction that ended the Permian geological epoch, 252 million years ago, wiped out most animals living on Earth ... while the first period of the Triassic—the Induan—had a disturbed ...