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  • Photos: Ore. Zoo polar bear trained to wear collar for study add to reading list  

    Posted on July 30, 2013 at 3:38 PM

    Updated Tuesday, Jul 30 at 4:59 PM

    Normally, polar bears have to be sedated in the wild before a collar is put on. But Tasul, a polar bear at the Oregon Zoo, has been trained to have the collar put on her.

    By Sara Roth, Staff

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