Polar bear Knut nibbles on a wooden 'candle' on his birthday cake on his first birthday in the Berlin zoo, Berlin, Germany, Wednesday, Dec. 5, 2007. Celebrity polar bear Knut, who won the hearts of millions around the globe as a roly-poly orphan cub, celebrated his first birthday Wednesday with a cake made from 300 eggs and 20 pounds of marzipan. [Agencies]