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Science 15 February 2002:
Vol. 295. no. 5558, pp. 1238 - 1239
DOI: 10.1126/science.1065459
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Books

EVOLUTION:
Do We Need Species Concepts?

A review by Kerry L. Shaw

Genes, Categories, and Species The Evolutionary and Cognitive Causes of the Species Problem
Jody Hey
Oxford University Press, New York, 2001. 235 pp. $45, £34.95. ISBN 0-19-514477-5.

Hey argues that attempts to craft a simple, universal definition of species are doomed because one term cannot capture all of the complexities of evolutionary divergence.
The author is in the Department of Biology, University of Maryland, College Park, MD 20742-4415, USA. E-mail: ks233{at}umail.umd.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)