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| history that happened before the invention of writing |
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| proof rather than written words |
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| locate and study things left behind by people |
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| study ancestors of modern human |
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| remains of once living things |
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| small groups of these hominids across Africa's Sahara and into Asia |
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| human made object from long ago |
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| how much carbon remains in a once living person, animal, or plant. Only works for fossils 70,000 years or younger |
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| movement from one place to another |
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| a long period of bitter cold with huge sheets of ice that covered earth surface |
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| a huge sheet of ice that move slowly and covers the earth |
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| large treeless plains found in arctic regions |
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| a way of life that sets a group of people apart from others |
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| organized group of people living and working under a set of rules an traditions |
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