The Advantage of Sex Why did sex evolve? The likely answers may surprise you. Sex and the Single Guppy Learn how exhibitionism has an evolutionary payoff.

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This is the mating dance of an african species of cichlid called pseudotropheus saulosi from Lake Malawi Metacafe Galleries 30 Jun 2016 271 131; Share Gallery.

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Mar 19, 2009 · Are humans meant to mate for life? Watch more at http://dsc.discovery.com/videos/science-of-sex-appeal/

In biology, mating (or mateing in British English) is the pairing of opposite-sex or hermaphroditic organisms, usually for the purposes of sexual reproduction.

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