A revolution is under way in timekeeping. Precision timekeeping based on atomic clocks already underpins much of our modern technology—telecommunications, computer networks and satellite-based positioning systems like GPS that are used by billions of people every day. But now research at NIST, JILA and other organizations throughout the world is improving atomic clock performance so quickly that many new applications are expected in the near futu ...

http://phys.org/news/2014-02-era-atomic-clocks.htm

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