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Thursday, October 28, 2010

Photo: Prehistoric Undersea Sex Was No Fluke


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Ancient undersea sex was far more common than previously thought, scientists revealed in a February 2009 paper.

Embryos found in fossils of placoderms (that's Austrophyllolepis, a type of placoderm, above) suggest that a diverse group of fish were mating via sexual intercourse.

Illustration by J. Long