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Watch Modern Marvels Season 13 Episode 49 Online

  • 7.9/10
  • COUNTRIES: United States of America
  • Subtitles: English

Strength...a powerful word, but what does it mean? How is it measured? Why are some things simply stronger than others. How strong is a rope, a tractor, a diamond, a tugboat or even plastic. How and why strength matter to us every day.