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Researchers determine what really killed Knut the polar bear

Researchers determine what really killed Knut the polar bear

More than four years after Knut the celebrity polar bear's death, scientists have finally uncovered the cause of his premature demise.  In a study published Thursday in the journal Scientific Reports, researchers say that Knut died from inflammation of the brain caused by an autoimmune disease known as anti-NMDA receptor encephalitis. The disease has previously only been seen in humans, and symptoms include headaches, psychotic episodes, epileptic seizures and hyperventilation. Although the disease can be devastating in humans, it is responsive to medical treatment, the authors write, and it is possible that it might be treatable in bears...

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