How do you prove a rock was actively shaped and used as a tool more than 3 million years ago? Scientists found a kit of more than 140 artifacts in one spot and say the tools’ crafters were pre-human.
How do you prove a rock was actively shaped and used as a tool more than 3 million years ago? Scientists found a kit of more than 140 artifacts in one spot and say the tools’ crafters were pre-human.
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