Knut's Best MomentsRemembering the world's most famous polar bear and his full four years of life

Credit: Clemens Bilan/AP

Updated: Tuesday Mar 22, 2011 | 06:00 AM EDT

GONE BUT NOT FORGOTTEN

Makeshift memorials have sprung up in honor of Knut in Berlin. Fans of the bear are still in shock from his sudden death March 19. "I've been blubbering for days," one wrote online.