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Atomic clocks feel the heat

11 Aug 2006 Isabelle Dumé

Temperature is not something that most people take into account when trying to find out what time it is -- unless your watch has frozen or melted that is. But in the ultra-precise world of atomic timekeeping, which governs navigation technology such as the global positioning system, the temperature is vital.

Two teams of physicists in the US and Australia have now calculated the tiny shift in the atomic tra

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