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Published online 6 May 1999 | Nature | doi:10.1038/news990506-9

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The maker's mark

Who made the first stone tools? Thirty-five years ago, the answer was easy: humans made tools, because making tools was a defining character of humans. In 1964, Louis Leakey and his colleagues, working at Olduvai Gorge in Tanzania, announced the remains of a hominid with a braincase appreciably larger than that of the previously known 'ape-man' Zinjanthropus boisei (now Paranthropus boisei).

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