![]() ![]() “All three of these could be the earliest members of the human line,” says Stringer. The structure of its skeleton, namely the shape of its pelvis, shows that the specimen likely walked upright as well. Scientists discovered another species, Ardipithecus ramidus, in Ethiopia in 1994 it lived some 4.4 million years ago. “But researchers aren’t in complete agreement.” Orrorin tugenensis, a specimen found in Kenya and known as Millennium Man, also dates back to around the same time and was about the size of a chimpanzee. ![]() “There’s some evidence that the species stood upright and balanced its head on the base of a skull,” says Chris Stringer, a professor of human evolution at the Natural History Museum London. Our first known common ancestor is Sahelanthropus tchadensis, a species found in Chad that dates to around 6 million years ago. While we are both primates, we did not evolve from chimpanzees and bonobos, two species that are today found mostly in Central Africa, in places like the Democratic Republic of Congo. Much of human evolution happened in this tiny portion of the world. ![]()
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