Science Quiz / Earth's Mass Extinctions

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Supposedly the second largest mass extinction. 57% of genera became extinct.
Occurred about 370 million years ago. 50% of genera became extinct.
Largest known mass extinction in the history of Earth. 83% of genera became extinct including 96% of marine species and 70% of vertebrates on land.
Happened about 200 million years ago. Resulted in the loss of 48% of all genera.
The most famous mass extinction. The results included 50% extinction rate for all genera. Mammals became dominant after the event.

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Created Oct 7, 2009ReportNominate
Tags:earth, Extinction, mass

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