Last Gorilla-Chimp-Human ancestor: The last common ancestor of gorillas, chimpanzees, and humans likely lived about 8 to 10 million years ago. Both the Nakalipithecus and Chororapithecus genuses are candidates. Genus Nakalipithecus: This “might” be the leading plausible candidate. From Kenya, they are dated to about 10 million years ago.

Location: Emerged in Western or Central Africa; spread to Eastern Africa and no further.
Size: Up to 5’8″ and 550 pounds (Eastern Lowland Gorillas)