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USA, Canada & Europe: Clocks on Daylight Saving / Summer Time (UK on BST) |
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GreenwichMeanTime.com
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NISTPrecise ClockNIST scientists have built a second "quantum logic clock," using quantum information processing techniques on a single ion of aluminium to make a clock that would not gain or lose more than one second in about 3.7 billion years. For more information, please seehttp://www.nist.gov/physlab/div847/logicclock_020410.cfm. |
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