Modern Marvels

Season 6 Episode 18: Clocks

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.

Genre:

Documentary

Seasons:

23

Episodes:

707

Cast:

Quality:

HD

Duration:

44 min

First Air:

1993

Rating:

8.1