U.S.

Polar bears celebrate birthday at zoo

By Edecio Martinez

November 16, 2012 / 1:10 PM EST / CBS News

Pike, a 30-year-old polar bear, plays in man made snow at the San Francisco Zoo on Nov. 15, 2012, in San Francisco, Calif. Pike and another polar bear, 32-year-old Ulu, celebrated their birthdays with 10 tons of man made snow and special treats.

Pike inspects a fish flavored frozen bear as he plays in man made snow at the San Francisco Zoo on Nov. 15, 2012, in San Francisco, Calif.

Pike rolls in man made snow at the San Francisco Zoo on Nov. 15, 2012, in San Francisco, Calif.

Pike plays in man made snow at the San Francisco Zoo on Nov. 15, 2012, in San Francisco, Calif.

Pike rolls in man made snow at the San Francisco Zoo on Nov. 15, 2012, in San Francisco, Calif.

Pike eats a frozen block of fish as he plays in man made snow at the San Francisco Zoo on Nov. 15, 2012, in San Francisco, Calif.

Pike plays in man made snow at the San Francisco Zoo on Nov. 15, 2012, in San Francisco, Calif.

CBS News 24/7