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Quantum-logic clock loses a second in 3.7 billion years

February 6th, 2010 link to (permalink)

Physicist Chin-wen (James) Chou and his colleagues from the National Institute of Standards and Technology in Boulder have brought the time to a standstill with their claim of having built a clock which is 100,000 times more precise than the existing international standard, the cesium fountain...

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