Knotty Thrills

Three physicists untie a 150-year-old tangle of a puzzle.
Aired: 7/15/2014 | 0:05:40

Upcoming NOVA Air Dates

  • THIRTEEN Secrets of Noah's Ark Wednesday, Oct. 7 9:00pm
  • THIRTEEN Petra - Lost City of Stone Wednesday, Oct. 7 10:00pm
  • WLIW21 Secrets of Noah's Ark Thursday, Oct. 8 9:00pm
  • WLIW21 Petra - Lost City of Stone Thursday, Oct. 8 10:00pm

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