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Oldest stone tools: stone choppers, earlier invention than scientists thought.

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4.4 million years old: uncovered in 1992. Most complete skeleton.

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Partial skull and skeleton, Omo 1.

Omo 2 partial skull; creatures mixed with features from earlier and later species.

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Found in Africa makes debut. Broken Hill Skull: one of the most important relics of human evolution

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Key discoveries in history of human evoltution 

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Key discoveries in history of human evoltution 

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Neanderthal: 1974- paleoanthropologist Don Johanson found 40% of a hominid skeleton dated 3.2 million years ago.  

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Neanderthal: 1974- paleoanthropologist Don Johanson found 40% of a hominid skeleton dated 3.2 million years ago.  