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Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time - Paperback
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Anyone alive in the eighteenth century would have known that "the longitude problem" was the thorniest scientific dilemma of the day. Lacking the ability to measure their longitude, sailors had been literally lost at sea as soon as they lost sight of land. One man, John Harrison, dared to imagine a mechanical solution--a clock that would keep precise time at sea, something no clock had ever been able to do on land.
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