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Extinction: How Life on Earth Nearly Ended 250 Million Years Ago

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Extinction: How Life on Earth Nearly Ended 250 Million Years Ago - Erwin, Douglas H
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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 65 million years ago. How this happened remains a mystery. But there are many competing theories. Some blame huge volcanic eruptions that covered an area as large as the continental United States; others argue for sudden changes in ocean levels and chemistry, including burps of methane gas; and still others cite the impact ...

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Extinction: How Life on Earth Nearly Ended 250 Million Years Ago 2008, Princeton University Press, Princeton

ISBN-13: 9780691136288

Trade paperback

Extinction: How Life on Earth Nearly Ended 250 Million Years Ago 2006, Princeton University Press, Princeton

ISBN-13: 9780691005249

Hardcover