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Men Pay the Ultimate Price to Attract Women


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The Ultimate Price

 

While it is tough to be a woman, being a man can be downright deadly.

 

Women live longer than men. And now scientists suggest a simple Darwinian reason: Competing for a mate can wear a guy out or get him killed.

 

"Women live longer in almost every country, and the sex difference in lifespan has been recognized since at least the mid-18th century," said Daniel Kruger at the University of Michigan. "It isn't a recent trend; it originates from our deep evolutionary history."

 

The idea is presented in the spring edition of the journal Human Nature.

 

Butting heads

 

In common chimpanzees, Kruger and his colleague Randolph Nesse report, mortality spikes among males around age 13, just as they're old enough to breed and start competing for social status.

 

Males of many species must fight vigorously for the right to mate. Think of rams butting heads. Spectacular male bird plumage is another example of biological effort required to succeed, effort that uses energy and can shorten a life.

 

In this scheme of natural selection, evolution shapes traits that help the best genes survive, sometimes to the detriment of individuals.

 

Human males don't always have to wrestle to get a woman these days, but the pressure to succeed sexually hasn't changed much, the researchers argue. Only the methods have been revised.

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