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Nature 394, 521-522 (6 August 1998) | doi:10.1038/28948

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Evolutionary biology:  Green beard as death warrant

Alan Grafen1

The Gradgrindian view of science — facts come first, ideas later — is rarely true, and there are few more direct demonstrations of that than the discovery of a phenomenon that previously existed only in theory. Genetics is rich in such phenomena, and an example is provided on page 573of this issue1, where Keller and Ross describe how they have identified evidence of a 'green-beard' gene.

  1. Alan Grafen is at St Johns College, University of Oxford, Oxford OX1 3JP, UK.
    e-mail: Email: alan.grafen@sjc.ox.ac.uk