TV Calendar: At My TV
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All over the world, scientists are discovering traces ofancient floods on a scale that dwarfs even the most severeflood disasters of recent times. What triggered thesecataclysmic floods, and could they strike again? Over a vastexpanse of Washington State called the Channeled Scablands,the level prairie gives way to bizarre, gargantuan rockformations: house-sized boulders seemingly dropped from thesky; a cliff carved by a waterfall twice the height ofNiagara; and potholes resembling ones scoured out by riverstoday, but ten times bigger. Like forensic detectives at acrime scene, geologists study these strange features andreconstruct catastrophic Ice Age floods more powerful than allthe world's top ten rivers combined. NOVA follows their effortsto uncover the geologic fingerprints of other colossalmegafloods in Iceland and—improbably—on the seabed of theEnglish Channel, where hundreds of thousands of years ago,another deluge smashed through a land bridge connecting Britainand France and turned Britain into an island for the firsttime. These great disasters ripped through terrain andtransformed continents in a matter of hours—and similarforces reawakened by climate change are posing an active threatto mountain communities throughout the world today.
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