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You’re not seeing the second coming of Noah’s Ark. The engineer in the foreground is standing inside one half of a rotor blade created for the world’s largest wind turbine. Earlier this summer, Siemens erected the towering windmill, which generates 6 megawatts, off the coast of Østerild, Denmark. Its rotor blades each measure 75 meters long; the tips of the blades move at speeds up to 80 meters per second.
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Willie Jones is an associate editor at IEEE Spectrum. In addition to editing and planning daily coverage, he manages several of Spectrum's newsletters and contributes regularly to the monthly Big Picture section that appears in the print edition.