Research CommentariesEvolution

One or Three Cambrian Radiations?

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Science  17 Apr 1998:
Vol. 280, Issue 5362, pp. 397-398
DOI: 10.1126/science.280.5362.397

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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.