03/18/2010 05:12 am ET | Updated May 25, 2011

Judah Levine: Keeping Time In Boulder

Judah Levine does not wear a watch and when he's at home he often loses track of the time But when Levine gets to his office at the National Institute of Standards and Technology (NIST), time is of the essence. Levine is in charge of maintaining and disseminating the country's official civilian time down to the nanosecond -- a task that has prompted colleagues to refer to him as "the nation's timekeeper."

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