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All of modern society relies upon a seemingly simple but surprisingly complex unit of measurement: the second. But knowing exactly what a “second” is is more complicated than you might think!

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Thank you to the following for helpful discussions and research for this episode:
Geoff Chester - U.S. Naval Observatory
Judah Levine - National Institute of Standards and Technology
Jeffrey Sherman - National Institute of Standards and Technology
Elizabeth Donley - National Institute of Standards and Technology

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