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July 11 2013

Optical lattice atomic clock could 'redefine the second'


Scientists say they have found a more accurate way to measure time.

We currently use atomic clocks to count the seconds, but tests on an alternative atomic timekeeper have revealed that it is more precise.

The devices, called optical lattice clocks, lost just one second every 300 million years - making them three times as accurate as current atomic clocks.

Writing in Nature Communications, the team said they offered a better system for defining the second.

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