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Science 17 April 1998:
Vol. 280. no. 5362, pp. 397 - 398
DOI: 10.1126/science.280.5362.397
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Research Commentaries

EVOLUTION:
One or Three Cambrian Radiations?

Guillaume Balavoine and André Adoutte

The Cambrian explosion was a time of great evolutionary change, especially in the appearance of organisms with bilateral symmetry. In their Research Commentary, Balavoine and Adoutte discuss recent findings that may allow a reinterpretation of animal phylogeny and may have a profound bearing on understanding of the Cambrian explosion.

G. Balavoine is at the Wellcome/CRC Institute, University of Cambridge, Cambridge CB2 1QR, UK. E-mail: gb227{at}mole.bio.cam.ac.uk A. Adoutte is at the URA 2227 du CNRS "Développement et Évolution," Université Paris-Sud 91405 Orsay Cedex, France. E-mail: Andre.Adoutte{at}bc4.u-psud.fr

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