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  1. Permian extinction - what caused it?

    Started by sare_mcdee, April 27th, 2012 08:21 PM
    climate change, extinctions, greenhouse effect, methane, permian
    • Replies: 3
    • Views: 3,624
    Last Post: April 29th, 2012 04:21 AM
    by skeptic  Go to last post
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