Best of 2011

Biggest Animal Headlines of the Year

From Knut's death to the Bronx Zoo cobra, animal news went wild this year

HEIDI THE CROSS-EYED POSSUM

She was supposed to have been the next Knut, but Heidi's fame was short-lived. Her unique condition earned her a place in the spotlight in Dec. 2010, and by the end of September, she was dead.