Tuesday, May 1, 2007

Arms race

Duck penises show "arms race" between sexes: study (Reuters)

A mallard brood is seen in this undated file photo. Several species of ducks, especially mallards, have evolved complicated genitals in what appears to be an 'arms race' between the sexes, researchers reported on Tuesday. (Handout/ U.S. Fish and Wildlife Services/Reuters)Reuters - Several species of ducks have evolved complicated genitals in what appears to be an "arms race" between the sexes, researchers reported on Tuesday.


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