On a clear, sunny day at a vineyard in the northern California town of Ukiah, a most unusual train chugs through a field of barely budding syrah grapes. Well, it doesn't chug so much as whoosh because this train—actually, a one-sixth scale train—doesn't rely upon a diesel engine or electricity to get around. It uses vacuum power and heavy duty magnets. The 89-year-old man who built it believes it could change how the world moves.

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