Cover Image: September 2002 Scientific American Magazine See Inside

Ultimate Clocks [Preview]

Atomic clocks are shrinking to microchip size, heading for space--and approaching the limits of useful precision

By W. Wayt Gibbs















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Dozens of the top clock makers in the worldconvened in New Orleans one muggy week this past May to present their latest inventions. There was

not a mechanic among them; these were scientists, and their


This article was originally published with the title Ultimate Clocks.



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