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[Berlin, Germany; January 7. Images via Getty]
Polar bear Knut plays in the snow at the Tiergarten zoo in Berlin on January 7, 2008. The bear caused a global sensation when he survived rejection by his mother and attracted more than two million visitors to the zoo. AFP PHOTO DDP/ MICHAEL KAPPELER GERMANY OUT (Photo credit should read MICHAEL KAPPELER/AFP/Getty Images)
