More Animal Instincts Photos
Knut!
Knut, the world's most famous polar bear, sticks out his tongue as he plays in his enclosure at the Berlin Zoologischer Garten Tuesday, Oct. 2, 2007. Knut caused a global sensation when he survived rejection by his mother nine months ago and attracted more than a million visitors to the zoo.
(Photo: MICHAEL KAPPELER/AFP/Getty Images)
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