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www.kansascity.com | 08/30/2008 | Scientists close in on mass killer of life on earth
I'd like a few more citations here, to address causality and identify who's saying these things happened and what proof they have for it. In short, though, the article says that the Permian-Triassic extinction (the dinosaur die-off) featured major greenhouse heating, acid rain, ozone-thinning, stagnant oceans, etc.
science  environment  history 
august 2008 by gnat
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