The family Hominidae comprises Orang-Utans (Pongo), Chimpanzees (Pan), Gorillas (Gorilla) and Humans (Homo sapians), collectively known as the "Great Apes"
Chimpanzees share more genetic material with humans (about 99%)than they do with gorillas. Bonobos (Pan paniscus) are much like chimps (Pan troglodytes) and were once thought to be another variety of chimp. They were only discovered in 1929. Scientists still know less about bonobos than any of the other great apes. For more information about great apes, click on the following link: http://www.centerforgreatapes.org