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6 agos 440056427 año aC - first mass extinction event

Descripción:

the end ordovician period occurred 440 million years ago and 86% of all species were lost https://userpages.umbc.edu/~squire/extinctions.html

Añadido al timeline:

alex huang science timeline

26 oct 2018

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fecha:

6 agos 440056427 año aC

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