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| A Brief History of the Earth. Part 1. Stone, steel, copper, linen, seed. |
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| Part 2. (minus linen, added cotton and wood) |
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| Part 3. (linen) |
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| Part 4 (added gravity) |
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| Part 5. (added silk and gravity) |
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| Part 6. (added gravity, old rail spike and sea urchin part) Found objects, starting with stone and developing. |
