The atomic clock 1948

The atomic clock… 

The atomic clock ensures great accuracy and stability: in a million years, two cesium clocks can be triggered in 3 seconds.

The principle of the atomic clock was enunciated by the American chemist Willard F. Libby (1908-1980) who won the Nobel Prize in Chemistry in 1960. 

There are 200 satellite-connected atomic clocks in the world today.
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