Three-month-old polar bea Knut playing with his minder Thomas Doerflein during his first outing at Berlin's Zoologischer Garten. Knut has died on March 19, 2011 The cause of death was not immediately known.
Picture taken on December 10, 2010 shows Knut yawning in his enclosure at the zoo in Berlin. Photo courtesy: AFP
June 17, 2010 picture showing Knut walking around his enclosure at Berlin's Zoologischer Garten. Photo courtesy: AFP
Knut rolling in the snow in his enclosure at Berlin's Zoologischer Garten. Photo courtesy: AFP
Knut playing with an old boot in his enclosure at Berlin's Zoologischer Garten
March 23, 2007 picture showing 3-month-old Knut during his first outing at Berlin's Zoologischer Garten. Photo courtesy: AFP
Knut during his first outing at Berlin's Zoologischer Garten. Photo courtesy: AFP
Knut lifting his paw as he chews on a twig on his first birthday at Berlin's Zoologischer Garten. Photo courtesy: AFP
December 5, 2007 picture showing Knut celebrating his first birthday at Berlin's Zoologischer Garten. Photo courtesy: AFP
Three-month-old polar bea Knut playing with his minder Thomas Doerflein during his first outing at Berlin's Zoologischer Garten. Knut has died on March 19, 2011 The cause of death was not immediately known. Photo courtesy: AFP