Chimpanzees (sometimes called chimps) are one of two exclusively African species of great ape that are currently extant. Native to sub-Saharan Africa, both are currently found in the Congo jungle. Classified in the genus Pan, they were once considered to be one species. However, since 1928, they have been recognized as two distinct species: the common chimpanzee (P. troglodytes) live north of the Congo River and the bonobo (P. paniscus) who live south. In addition, P. troglodytes is divided into four subspecies, while P. paniscus has none. Based on genome sequencing, the two extant Pan species diverged around one million years ago. The most obvious differences are that chimpanzees are somewhat larger, more aggressive and male dominated, while the bonobos are more gracile, peaceful, and female dominated.