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A Brain for All Seasons: Human Evolution

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Description: Offers an outline of William Calvin's from his book about a theory about human brain evolution and climate change.
William H. Calvin, A Brain for All Seasons (University of Chicago Press, 2002), Table of Contents A Brain for All Seasons:  Human Evolution and Abrupt Climate Change (University of Chicago Press, 2002), table of contents and preamble.
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Page title:William H. Calvin, A Brain for All Seasons (University of Chicago Press, 2002), Table of Contents
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Description:One of the most shocking scientific realizations of all time has slowly been dawning on us: the earth’s climate does great flip-flops every few thousand years, and with breathtaking speed. Many times in the lives of our ancestors, the climate abruptly cooled, just within several years. Worse was the accompanying drought and the forest fires, all around the world. Populations crashed for most mammals, including our ancestors. Our ancestors lived through hundreds of such episodes – but each became a population bottleneck, one that eliminated most of their relatives. We are the improbable descendants of those who survived – and later thrived.
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Creation Date: 28-mar-1997
Expiration Date: 29-mar-2014