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Olduvai
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Olduvai III: Catacylsm
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From Horsepower to Horse Power. When Trucks stop, Horses start.

From Horsepower to Horse Power. When Trucks stop, Horses start. Preface. Before the industrial revolution there were only four sources of mechanical power of any economic significance. They were human labor, animal labor, water power (near flowing streams) and wind power.   Work done by animals, especially on farms, was still important at the beginning of […]

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Olduvai IV: Courage
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Olduvai II: Exodus
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