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Name: Paul
Status: other
Grade: other
Location: Outside U.S.
Country: USA
Date: Summer 2013


Question:
What theories explain why 90% marine life extintion event of between 200 million and 300 million years ago?



Replies:
Hi Paul,

Thanks for the question. I am not an expert in this field. I would recommend reading about the topics using Google Scholar.

I hope this helps. Please let me know if you have more questions. Thanks Jeff



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