Useless Information Warning!

Ok, this is a random post, but apparently in Antarctica the Adelie Penguin females are floozies. They go out, leaving their lifelong mate for a night, and find single male penguins to 'copulate' with in exchange for stones to build their nests.

Just a little heads up for all you useless information junkies...

The Light Version
http://www.coolquiz.com/trivia/explain/docs/penguin.asp
The Heavy Version
http://elibrary.unm.edu/sora/Auk/v115n02/p0526-p0528.pdf