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Amazing haul of ancient human finds unveiled

As to how H. naledi held on to its distinctive characteristics while living cheek-by-jowl with other human species, Prof Hawks said: "It's hard to say it was geographic isolation because there's no boundary - no barrier. It's the same landscape from here to Tanzania; we're in one continuous savannah, woodland-type habitat.
He added that the human-sized teeth probably reflected a diet like that of modern humans. In addition, H. naledi had limb proportions just like ours and there is no apparent reason why it could not have used stone tools.
"It doesn't look like they're in a different ecological niche. That's weird; it's a problem. This is not a situation where we can point to them and say: 'They co-existed because they're using resources differently',"