Dr Wineland has, however, built a working clock with his atoms and it is the most accurate clock in history.

ECONOMIST: The 2012 Nobel prizes

With an accurate clock, you could take a reading from the sun at noon and figure out your longitude.

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Since it gets its time from the GPS satellites, all of which contain on-board atomic clocks, if your watch stops you'll always have an accurate clock handy.

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His realization was that the solution wouldn't come from improved astronomical readings, as many thinkers believed, but from an extremely accurate clock that could tell the time of the home port while at sea.

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He had already devoted decades--and spent thousands of pounds advanced by Parliament--trying to make an accurate shipboard clock.

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Then in 1656, Dutch mathematician Christiaan Huygens made the first working pendulum clock, accurate to an error of less than one minute per day.

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She kept the alarm clock on the dresser wound, and accurate to the minute by the wireless morning and evening.

NEWYORKER: The Woman of the House