 Genetic data can provide important insights into human evolution.Biologists classify humans, along with only a few other species, as great apes (species in the family Hominidae).The living Hominidae include two distinct species of chimpanzee (the bonobo, "Pan paniscus", and the common chimpanzee, "Pan troglodytes"), two species of gorilla (the western gorilla, "Gorilla gorilla", and the eastern gorilla, "Gorilla graueri"), and two species of orangutan (the Bornean orangutan, "Pongo pygmaeus", and the Sumatran orangutan, "Pongo abelii").