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(Paperback, Updated Edition)
By: Douglas H. Erwin
ISBN: 9780691165653
Readership/Audience: General
Publication Date: Jun 2015
Publisher: Princeton University Press
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Some 250 million years ago, the earth suffered the greatest biological crisis in its history. Around 95 percent of all living species died out--a global catastrophe far greater than the dinosaurs' demise 185 million years later. How this happened remains a mystery. But there are many competing theories. Some blame huge volcanic eruptions that cover
