"Archaeologists working in the Kenyan Rift Valley have discovered the oldest known stone tools in the world. Dated to around 3.3 million years ago, the implements are some 700,000 years older than stone tools from Ethiopia that previously held this distinction. They are so old, in fact, that they predate the earliest fossils representing our genus, Homo, by half a million years. As such they suggest that stone tool manufacture began not with Homo, but with a more primitive member of the human family." Source: Scientific American.
Comment: The picture that is starting to emerge from recent discoveries is that several different species or sub-species of intelligent and sometimes tool-using, bipedal primates appeared in Africa and then migrated into the Near East, Europe and parts of Asia. Some of these primates may have evolved outside of Africa as well.
Modern humans, for instance, apparently didn't encounter the Neanderthals until they had migrated into the Near East and Europe. This and the fact that modern Africans don't have Neanderthal DNA suggests that the Neanderthals evolved outside of Africa. This in turn suggests that several species of human ancestors may have already spread across a wide territory outside of Africa before humans and Neanderthals appeared.