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Knut's Best MomentsRemembering the world's most famous polar bear and his full four years of life
Credit: Peter Griesbach/Landov
Updated: Tuesday Mar 22, 2011 | 06:00 AM EDT
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Born in December 2006 to a mother who rejected him, Knut was hand-reared by Berlin Zoo bear keeper Thomas Doerflein and adored by millions.
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