PZ Myers posted Entry 1632 on November 1, 2005 09:05 PM.
Trackback URL: http://www.pandasthumb.org/cgi-bin/mt/mt-tb.fcgi/1627
Q: What unique organ is found only in mammals, but not in fish, amphibians, reptiles, or birds?
The title and that little picture to the left ought to be hint enough, but if not, read on.
Continue reading "Evolution of the mammalian vagina" (on Pharyngula)
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