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the long period of time before people developed systems of writing and written language


a scientist who uncovers evidence, or proof, from the past archaeology.


the study of past cultures through the things that remain such as buildings, tools, or pottery .


an object made by people long ago


to move from one place to another


a huge ice sheet

Ice Age

a period of time when glaciers covered great stretches of land


city in New Mexico near where archaeologists found many early human-made objects


a prehistoric "land bridge" that once connected Asia and North America

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