Good way to get kids to actually focus in class while teaching biology, geology, and history.
95% ExtinctThis will be on the test!!251 Million Years Ago
Permian-Triassic Extinction199 Million Years Ago
Not quite the Tr-J extinction event itself, that one's about two million years earlier than what's written here.299 Million Years Ago
Roughly the beginning of the Permian period.\Eek!/