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Season 39 Episode 5 | 53m 3s | Video has closed captioning.
In the Rocky Mountains, archeologists uncover a unique fossil site packed with astonishingly well-preserved bones of mammoths, mastodons, and other giant extinct beasts. The discovery opens a highly focused window on the vanished world of the Ice Age in North America.
Aired: 01/31/12
Expired: 03/16/16
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