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Print..."stone age" of human technological history was coming to an end, and the age of metals was beginning. A further set of technological changes, beginning around 4000 B. C.E.,

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Page 1: Print..."stone age" of human technological history was coming to an end, and the age of metals was beginning. A further set of technological changes, beginning around 4000 B. C.E.,
Page 2: Print..."stone age" of human technological history was coming to an end, and the age of metals was beginning. A further set of technological changes, beginning around 4000 B. C.E.,
Page 3: Print..."stone age" of human technological history was coming to an end, and the age of metals was beginning. A further set of technological changes, beginning around 4000 B. C.E.,
Page 4: Print..."stone age" of human technological history was coming to an end, and the age of metals was beginning. A further set of technological changes, beginning around 4000 B. C.E.,