Isbjørnen Knut døde af ekstremt sjælden sygdom

Gæsterne i Berlins zoo så forfærdede til, da den populære isbjørn Knut i 2011 faldt om og døde i sin indhegning. Fire år senere har forskere fundet en forklaring på det mystiske dødsfald.

(FILES) - Picture taken on January 8, 2010 shows the polar bear Knut rolling in the snow in his enclosure at Berlin's Zoologischer Garten zoo. Four years after the death of Germany's superstar polar bear Knut, researchers said on they have solved the riddle of his demise - - and stumbled upon an important finding in veterinary science. An analysis of Knut's braincells eventually confirmed that he was indeed suffering from an autoimmune disorder called anti-NDMA receptor encephalitis - - which "effectively shuts down the body's immunity system", said Pruess, adding that nerve cells end up damaged. AFP PHOTO / JOHN MACDOUGALL Fold sammen
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Foto: JOHN MACDOUGALL