Gorilla ready to party at 60th birthday

A zoo in Ohio says its matriarch gorilla Colo was the first gorilla born in a zoo and is about to celebrate her 60th birthday.

The oldest known gorilla living in a zoo is doing well after a surgical biopsy ahead of her 60th birthday on December 22.

The Columbus Zoo and Aquarium said on Saturday that veterinarians successfully removed a mass under the gorilla's arm that recently started causing her discomfort.

The female named Colo was the first gorilla born in a zoo. She has surpassed the usual life expectancy by two decades.

Colo is a mother of three, grandmother of 16, great-grandmother of 12 and great-great-grandmother of three.