On this day in 1956, a baby gorilla named Colo enters the world at the Columbus Zoo in Ohio, becoming the first-ever gorilla born in captivity. Weighing in at approximately 4 pounds, Colo, a western lowland gorilla whose name was a combination of Columbus and Ohio, was the daughter of Millie and Mac, two gorillas captured in French Cameroon, Africa, who were brought to the Columbus Zoo in 1951. Before Colo's birth, gorillas found at zoos were caught in the wild, often by brutal means. In order to capture a gorilla when it was young and therefore still small enough to handle, hunters frequently had to kill the gorilla's parents and other family members. Gorillas are peaceful, intelligent animals, native to Africa, who live in small groups led by one adult male, known as a silverback. There are three subspecies of gorilla: western lowland, eastern lowland and mountain. The subspecies are similar and the majority of gorillas in captivity are western lowland. Gorillas are vegetarians...