Since the Egyptians invented them three thousand years ago, power tools have transformed the face of the earth. As we trace their evolution, we find out their hidden commonalities: from power tools that slice mountains in half to new breakthroughs in nanotechnology that enable them to literally split hairs. Follow the life of a power tool as it goes from an idea to our garage shelf as we discover how they're being used in surprising ways in sports, medicine and art.moreless
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