Out of the Chattering Ice

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Science  28 Jun 2002:
Vol. 296, Issue 5577, pp. 2342-2343
DOI: 10.1126/science.1071755

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A Brain for All Seasons Human Evolution and Abrupt Climate Change. William H. Calvin. University of Chicago Press, Chicago, 2002. 349 pp. $25, £16. ISBN 0-226-09201-1.

Through the course of a travelogue, Calvin argues that repeated episodes of abrupt cooling played a critical role in human evolution and that human-caused global warming may paradoxically trigger another crash in global temperatures.

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