Clocks - S6.E18 - Modern Marvels
Does anybody really know what time it is? Set your clocks as we explore the relativity of time from antiquity–when man attempted to chart time with methods ranging from shadows, candles, and water–to today’s atomic clock system–accurate to within one second every two-million years.
Clocks - S6.E18 - Modern Marvels
February 22, 1999
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