Keepers at Chester Zoo in the UK were quick to notice when 25-year-old Rico, a Linnaeus's two-toed sloth, developed a swelling on the side of his face. The zoo team performed a CT scan on Rico, which ...

Credit: Chester Zoo/Cover Images Rico the sloth has undergone pioneering surgery to take care of a pesky toothache that had been plaguing Chester Zoo’s slow-moving mammal. Amazing images captured at ...

Early last year, keepers at Chester Zoo first spotted that 25-year-old Rico, a two-toed sloth, had swellings on the side of ...