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NOVA

Killer Floods

Season 44 Episode 18 | 54m 10s

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: 10/16/17 | Expires: 09/20/23
National Corporate funding for NOVA is provided by Carlisle Companies and Viking Cruises. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.
Extra
Watch • 2:04
Antiques Roadshow
Appraisal: Staffordshire Child's Tea Service, ca. 1825
Appraisal: Staffordshire Child's Tea Service, ca. 1825
Clip: S29 E23 | 2:04
Watch • 1:04
Antiques Roadshow
Appraisal: Walking Popeye with Original Box, ca. 1935
Appraisal: Walking Popeye with Original Box, ca. 1935
Clip: S29 E23 | 1:04
Watch • 1:52
Antiques Roadshow
Appraisal: Yonezawa Toys Airplane, ca. 1950
Appraisal: Yonezawa Toys Airplane, ca. 1950
Clip: S29 E23 | 1:52
Watch • 0:32
Antiques Roadshow
Appraisal: Renaissance-revival Style Crib & Bill, ca. 1892
Appraisal: Renaissance-revival Style Crib & Bill, ca. 1892
Clip: S29 E23 | 0:32
Watch • 0:17
Antiques Roadshow
Appraisal: Child's Cobalt-buttoned Shoes, ca. 1890
Appraisal: Child's Cobalt-buttoned Shoes, ca. 1890
Clip: S29 E23 | 0:17
Watch • 0:28
Antiques Roadshow
Appraisal: Child’s Pieced & Appliquéd Quilt, ca. 1850
Appraisal: Child’s Pieced & Appliquéd Quilt, ca. 1850
Clip: S29 E23 | 0:28
Watch • 4:13
Nature
NATURE - Season 44
Get a sneak peek at a brand new season of NATURE on PBS.
Preview: S44 | 4:13
Watch • 0:30
Independent Lens
Trailer | Ratified
Follow the fight to ratify the Equal Rights Amendment with a pivotal legal battle in Virginia.
Preview: S27 E2 | 0:30
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NOVA
Human: Building Empires Preview
Discover how two revolutionary ancient inventions changed the course of humanity forever.
Preview: S52 E16 | 0:30
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American Masters
How Henry Winkler helped Marlee Matlin through a turbulent time in her life
Henry Winkler took Marlee Matlin in for two years while she recovered from a turbulent time.
Clip: S39 E7 | 4:12
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