A haul of stone blades from a cave in South Africa suggests that early humans were already masters of complex technology more than 70,000 years ago. The journal Nature reports on the new find which suggests that early humans passed on this knowledge down the generations. Dr. Curtis Marean, an archaeologist at Arizona State University in Tempe, who led the team that found the bladelets and Dr. Matthew Pope from the University College London argue that this could be the earliest evidence of truly modern human behaviour.

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