PALEOZOIC

538-252 MYA

The first Complex Animals, Lives in The sea. Consist of Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian epoch

The second half of this period also marks the birth of trees and also the first animals to made it to land. However, there were 3 different mass extinctions with the third one being the biggest mass extinction in the History of Earth.