Mass Extinctions

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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

Devonian Extinction: 360 mya

The Devonian mass extinction probably occurred for the same reasons as the Ordovician mass extinction, the glaciation of Gondwana due to continental drift. While it wasn't as severe as the Ordovician extinction, it affected marine life more than life on land.