Editing Prehistory (section)

=== Permian Period===
[[File:Gorgonopsid.jpg|thumb|right|A Gorgonopsid: kinda lizard-like, kinda dog-like, totally not someone you'd want to come across in the late Permian]]
*'''299 to 252 million years ago'''
The world cooled down to something similar to what it's like today. Also tetrapods begins to rapidly diversify. Anapsids, Synapsids and Diapsids move into fill a wide variety of ecological niches, from large herd dwelling herbivores to large predators to small burrowing critters. These were still pretty unrefined and clunky, but it was not just a world of Newts and Lizards. Synapsids end up on top, probably because they developed endothermy and as such could better live in places that got snowfall and would not go into a torpor when the temperature dropped. That said they were not totally dominant.

The Permian Period ends with the End Permian Extinction Event, also known as The Great Dying. Caused by massive volcanic eruptions in what is now Siberia it was the single worst mass extinction in Earth's history.