Dolly the Southern white rhino had to be euthanized due to medical issues at the Tennessee zoo where she had lived since 1976. Screengrab from Zoo Knoxville's Facebook post A 56-year-old ...

She was one of the first white rhinos at the Knoxville zoo, where she had lived since 1976. The southern white rhino raised 10 calves throughout her life and could be fiercely protective of them ...