Apes, monkeys, gibbons, orangutans, chimpanzees, and gorillas evolved over 30-35 million years ago. They are found in the tropical jungles of Southeast Asia, India and Africa Gorillas, the largest of the apes, growing to six feet and weighing over six hundred pounds. They live in groups known as 'troops, express human emotions and use sign language. They are some of nature's noblest creatures.