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dipatravechai1faa dipatravechai1faa
  • 24-01-2017
  • Biology
Answered

What caused the ordovician-silurian extinction event?

Verified Answer :

righttwix
righttwix righttwix
  • 06-02-2017

there are 2 reasonable theories: 1) the earth cooling down 2) the sea level fell

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