Rex, an Asian elephant, was euthanized, an Oklahoma zoo said. Dr. Jennifer D. Screengrab from @Okczoo on Instagram A 57-year-old Asian elephant ... the Oklahoma City Zoo and Botanical Garden ...

A 57-year-old ... an Oklahoma zoo said. Rex, “one of the oldest male Asian elephants” in the Association of Zoos and Aquariums, was being treated for age-related issues, the Oklahoma City ...