Gorillas are one of the four species of great apes that are the closest living relations of humans. The other three species are chimpanzees, bonobos and orangutans. All great apes have arms that are longer than their legs. Great apes are not considered monkeys because they are larger, walk upright for a longer period of time, don't have tails and have much larger, more developed brains than monkeys. It was about nine million years ago that the genus Gorilla split from humans and chimps. About three million years after that the lineages of chimps and humans diverged. Taken at Zoo Miami. Nikon D7000; 1/1250s; f/ 5.6; ISO 800