This pushes the earliest known date for humans in the area a lot farther back. The tools are such that they can't tell if they were made by which one of our hominid ancestors. I can't find it now, but I saw an article the other day that said we modern humans are the product of at least four other primate species (outside of ones like Neanderthals, Denosivians, and others) bumping uglies, and that our species would be different if just one of those hadn't occurred.