By the end of next year, at least three automakers, Honda, Hyundai and Toyota, will be offering U.S. motorists new fuel-cell vehicles running on hydrogen rather than gasoline. The
companies are rightly touting the technology as revolutionary. But fuel cells actually have a long past. The technology got its first serious use during the Apollo moon mission, and actually dates
back to the mid-19th Century. And the car itself is an old idea: the first self-propelled vehicle was driven by Roman Emperor Commodius. Wound human hair, not gasoline, drove it.
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