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

The full episode is no longer available for online streaming. Why?

Please continue to enjoy extra(s) from this episode. The full episode is still available for purchase through the "Buy Now" links.

Problems Playing Video? | Closed Captioning

National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.

Sponsored By:

NOVA Now

Podcast

NOVA Now

Now it's more critical than ever to distinguish fact from fiction. Introducing NOVA Now, a new podcast digging into the science behind the headlines.

Subscribe