Gnawing Knut

Knut, a three-month-old polar bear cub, plays with a zookeeper in his enclosure at Berlin's Zoologischer Garten zoo Friday, March 30, 2007. The bear, born Dec. 5, 2006, was rejected by his mother and his main keeper Thomas Doerflein bottle-fed him. Knut, who has become a global sensation and has his own video podcast from the zoo, has become a marketing phenomenon in Germany.

Credit: JOHN MACDOUGALL/AFP/Getty