Duck penises show arms race between sexes 14867
http://uk.reuters.com/article/oddlyEnoughNews/idUKN3046442120070501
by --B
Wed May 2nd, 2007 9:36am
(from #bor)
[score: 209 | approval: 0%]
WASHINGTON (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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