The Sixth Mass Extinction will be the first created by a Species - Us!
Ordovician Extinction: 440 mya Devonian Extinction: 360 mya Permian Extinction: 250 mya Triassic Extinction: 210 mya Cretaceous Extinction: 65 mya Doomsday Asteroid, year AD 20?? Climate Change
Ordovician Extinction: 440 mya Devonian Extinction: 360 mya Permian Extinction: 250 mya Triassic Extinction: 210 mya Cretaceous Extinction: 65 mya Doomsday Asteroid, year AD 20??
Climate Change
Triassic Extinction: 210 mya
Once again, causes of this extinction are unclear. But it made possible the era of Dinosaurs.
