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 ... But most life is concentrated ...

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

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 ...

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

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

Learn more about a time period marked by an intense burst ... The Cambrian Explosion saw an incredible diversity of life emerge, including many major animal groups alive today.

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 ...

or "life oasis," for terrestrial plants during the end-Permian mass extinction, the most severe biological crisis since the ...

This period, sometimes referred to as "The ... it somehow shielded a wide variety of plants. Read More: The Permian ...