JOHN READER / SCIENCE PHOTO LIBRARY JOHN READER / SCIENCE PHOTO LIBRARY
Composite photograph of the skull of Zinjanthropus boisei, found at Olduvai Gorge, Tanzania in 1959 by Mary Leakey. The background is the area around the excavation site. The skull was named Z. boisei by Louis Leakey in 1959, but is popularly known as Zinj or 'the Nutcracker Man' due to the enormous size of its teeth. It was dated at 1.75 million years old. The specimen was found in association with stone tools, but resembled in many respects the non-tool making australopithecine group thought to be the precursor of modern man. It has been classified by anatomists as a robust australopithecine and is sometimes called Australopithecus zinjanthropus boisei.
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