Photo Gallery: Knut through the Ages 12/03/2008
  Knut weighed just 810 grams at the time of his birth, and he had to gain at...
REUTERS

Knut weighed just 810 grams at the time of his birth, and he had to gain at least 10 times that before he could meet his Berlin fans. The zoo waited until he weighed 9 kilograms (about 19 pounds) and for a little sun before presenting him.