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

Watch NOVA Season 44 Episode 25 Online

  • 7.1/10
  • Subtitles: English

All over the world, scientists are discovering traces of ancient floods on a scale that dwarfs even the most severe flood disasters of recent times. What triggered these cataclysmic floods, and could they strike again? In the Channeled Scablands of Washington State, the level prairie gives way to bizarre, gargantuan rock formations.