Article: Test your Carnal Knowledge.

Byline: Faye Flam

The past year brought us more shocking insights into the world of sex: from the secret lives of Komodo dragons to new hope for erectile dysfunction, from progress in the long-standing puzzle about human/Neanderthal sex to scientific confirmation of the tricks of pickup artists.

Have you been paying attention? Here's our second annual sex-and-science quiz to test your Carnal Knowledge.

1. In the course of some scientific investigations, scientists recently found they could make heterosexual male snakes attempt to have gay sex. How did they do it?

A. They sprayed captive snakes with a recently declassified "gay bomb," ...

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