BERLIN — The aging mother of Knut, the famous hand-reared polar bear who captured German hearts and the world's attention in his short life, was put down at Berlin Zoo on Tuesday because it said she was blind, deaf and suffering. Tosca, who rejected her cub Knut at birth in 2006, was nearly 30 years old, the zoo said. Knut, who died aged 4 in 2011 from an epileptic fit, became the zoo's star attraction after Tosca rejected him at birth. That would have normally meant death but the fluffy white cub was saved against the odds and reared by zookeeper Thomas Doerflein. “Deaf, blind and disoriented, Tosca was found stumbling around in her cage on Tuesday,” the zoo said in a statement. “She lost her sense of smell. It was a pathetic sight. Veterinarians, animal protection officials and zoo officials came to a joint decision to put the elderly Tosca out of her misery.” — Reuters