There are a few pieces of evidence that points to the continent of Africa being the origins of humans and human ancestors. In the 1920s, Raymond Dart, a paleontologist from South Africa, discovered the remains of a creature that walked upright on two legs and had an enlarged (though by today's standards, tiny) brain, and thus was considered to be a human ancestor along the hominid line, called by Dart an Australopithecus, or southern ape. More of these Australopithecus and creatures like them were found throughout Kenya and Tanzania, and in the 1970s American Donald Johanson found a skeleton in Ethiopia whose origins were from at least three million years ago.