The common chimpanzee ("Pan troglodytes"), or robust chimpanzee, is a species of great ape. The common chimpanzee is often called the chimpanzee (or "chimp"), though this can be used to refer to both species in the genus "Pan": the common chimpanzee and the closely related bonobo. Evidence from fossils and DNA sequencing show both species of chimpanzees are the closest living relatives to modern humans.