The sudden death four years ago of Knut, the celebrity Berlin Zoo polar bear who ended up on the cover of Vanity Fair, shocked his fans around the world and posed a riddle for veterinarians anxious to ...

Little roly-poly Knut was an instant international celebrity when he was born in a Berlin zoo four years ago. Five hundred reporters covered his public debut. Millions flocked from around the world to ...

We asked for the Internet to make Siku the Danish baby polar bear famous, and it delivered. The new adorable polar bear cub on the block's rise to fame includes Der Spiegel saying he's "conquered the ...