FILE In this March 23, 2007 file photo, Knut, the polar bear cub, has(02)

FILE In this March 23, 2007 file photo, Knut, the polar bear cub, has(02)


Image gallery: Knut The Polar Bear Died From Brain Problems Zoo Says

Berlin zoo says brain problems led to Knut's death Polar Bear Knut's Death Tied to Brain Problems Live Science FILE In this March 23, 2007 file photo, Knut, the polar bear cub, has Star polar bear Knut suffered swelling of the brain before he died Knut the polar bear mysterious death finally explained by scientists