Planet Earth -From Icehouse to Hothouse -A NASA Alert

Clip_image002 Three hundred million years ago, Earth's climate shifted dramatically from icehouse to hothouse, with major environmental consequences. That shift was the result of both rising atmospheric carbon dioxide concentrations and the melting of vast ice sheets, new research by University of Michigan paleoclimatologist Christopher Poulsen shows in a preview of an important symposium he's leading at the current annual meeting of the Amercian Association for the Advancement of Science. Posted by Casey Kazan.

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