NOVA

Killer Floods Preview

Preview: Season 44 Episode 18 | 30s | Video has closed captioning.

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.

Aired: 10/17/17

Rating: NR

Problems Playing Video? | Closed Captioning

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