Associated Press
Polar bear Knut pulls a face at a Berlin zoo on Sunday. Knut, who celebrates his first birthday on Wednesday, was rejected by his mother after birth and hand-raised by zookeepers. Zoo attendance went up by 20 percent since his public debut in March.

Polar bear Knut pulls a face at a Berlin zoo on Sunday. Knut, who celebrates his first birthday on Wednesday, was rejected by his mother after birth and hand-raised by zookeepers. Zoo attendance went up by 20 percent since his public debut in March.