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Scientists have discovered that a protein in semen acts on the female brain to prompt ovulation, and is the same molecule that regulates the growth, maintenance, and survival of nerve cells. 
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Japan leads the world's robotic industries in fields ranging from manufacturing to entertainment and security. Articles about ROBOTICS: http://www.scoop.it/t/science-news?tag=robotics
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A Japanese study of tiny spines that occur between brain cells revealed virgin male rats to have far more of them than more sexually experienced counterparts.
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From
phys
Sex differences account for some of the most of the spectacular traits in nature: the wild colours of male guppies, the plumage of peacocks, tusks on walruses and antlers on moose.
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Hormones shape our bodies, make us fertile, excite our most basic urges, and as scientists have known for years, they govern the behaviors that separate men from women. But how?
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In the animal world, males typically search for their female partners. The mystery is that in some species, you get a reversal -- the females search for males.
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