Watch Trailer
DISCLAIMER: Not all titles shown are currently available on all streaming providers.

Watch Modern Marvels Season 6 Episode 18 Online

  • 8.5/10
  • COUNTRIES: United States of America
  • Subtitles: English

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.