Denver (AP) The Denver Zoo has euthanized a 22-year-old polar bear named Olaf after discovering he had terminal liver cancer.
Olaf had been a popular fixture in Denver since arriving from Omaha's Henry Doorly zoo in 1987. He fathered four cubs.
Zoo veterinarians found the cancer on Friday during a biopsy they performed after noticing Olaf had been lethargic and wasn't eating well. He was euthanized Saturday.
The zoo says Olaf was known for his “distinguished palate” because unlike most bears, he didn't like eating fish heads. He would remove them before eating the torso and tail.
The zoo says polar bears have a life span of 20 to 25 years.