Everyone loves the idea of a train trip, so why is our railway system so lacking?

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Douglas Corrigan earned the nickname "Wrong Way" on July 17, 1938, when he filed a flight plan from Brooklyn to Long Beach, California—but ended up in Ireland.
In 1915, Renoir, Degas, and more appeared on film created with the then-new-fangled technology of motion pictures.
Einstein didn't write it, but it's still a great puzzle.