Veterinarians remove mass from arm of world's oldest zoo gorillaDecember 5, 2016Colo, a western lowland gorilla, is not only the world's first gorilla born in a zoo, she's also the oldest zoo gorilla in the world. She lives at the Columbus Zoo and Aquarium in Powel, Ohio. Going on 60 years now, Colo recently underwent an examination by zoo veterinarians to remove a mass growing under her arm.
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