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Question re:Evolution and Menstruation

B. Moosang bmoosang at uoguelph.ca
Tue Dec 31 19:55:13 EST 1996

OK, just trying to settle an argument between two non-science people - 
how long would something like menstruation take to evolve?  The argument 
that I have been presented with is that woman began menstruating (rather 
then doing what other critters do (which I can't remember the scientific 
term for but is basically go into heat)) after people began living in 
more fixed shelters between - let's say for arguement sake between 
5000-15000 years ago.  Would this be enough time for this to evolve?

Thanks for your time,


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