The world’s oldest known zoo gorilla has died. Colo was born in 1956 at the Columbus Zoo in the American state of Ohio. She was the first-ever gorilla to be born in captivity. She died in her sleep on January 17, zoo officials say. Colo lived more than 20 years beyond the average life expectancy for female gorillas in human care. Researchers studied her to better understand how to help animals live longer in zoos.
