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Page last updated at 10:05 GMT, Friday, 4 November 2011

The end of the 'leap second'?


Next year, the international community will vote on whether to abolish the leap second - the extra pip you occasionally hear at New Year - which, if it goes through, would mean that for the first time in our history our time-scale may no longer be tied to the rotation of our planet. Science reporter Rebecca Morelle has been finding out more.

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