'War Between the Sexes:' The Co-evolution of Genitalia in Waterfowl

A team of biologists at Yale University and the University of Sheffield discovered anatomical details about the female reproductive tract in waterfowl that indicate that male and female anatomy have co-evolved in a “sexual arms race.”

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<p><a href="http://www.physorg.com/news97253814.html">'War Between the Sexes:' The Co-evolution of Genitalia in Waterfowl</a></p> <p>A team of biologists at Yale University and the University of Sheffield discovered anatomical details about the female reproductive tract in waterfowl that indicate that male and female anatomy have co-evolved in a “sexual arms race.”</p>