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How Long Have People Been On EarthEssay Preview: How Long Have People Been On EarthReport this essay-Scientists disagree about how long people have been on earth40,000years to 2 milliondiscoveries in AfricaTanzania – acehaeologists found remains that may be million years oldAlso found tools – stone with charpedgesTechnology – the use of skills and tools to.
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Earliest Stone ToolsGreat Rift ValleyOld Stone AgeRemains Of Ancient Animal Bones