Zoo Knoxville said goodbye to a beloved southern white rhino named Dolly, who was the oldest rhinoceros in the United States at 56 years old. The zoo says Dolly was euthanized after her mobility declined significantly.

Dolly, oldest rhino in the United States, dies at Knoxville zoo at age 56

Zoo Knoxville said goodbye to a beloved southern white rhino named Dolly, who was the oldest rhinoceros in the United States at 56 years old. The zoo says Dolly was euthanized after her mobility declined significantly.