A fan wears a t-shirt showing late celebrity polar bear Knut and his his keeper Thomas Doerflein during a demonstration outside the Zoo in Berlin, April 2, 2011, to protest against the planned stuffing of the body and displaying of Knut in a Berlin museum. The words read 'Knut boldness'. Knut, who won global fame as a cute cub, died suddenly in front of hundreds of horrified visitors on March 19 aged four after he fell unconscious into a pool at his enclosure. The polar bear suffered from viral encephalitis, an inflammation of the brain, which caused him to collapse before he drowned, a necropsy indicated. REUTERS/Fabrizio Bensch (GERMANY - Tags: ANIMALS SCI TECH)