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Season 21, episode 17. Keep your place, move between servers, and stay ready for the next episode.
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Buried in Ash
Ten million years ago, an enormous volcanic eruption buried much of what is now Nebraska in up to 10 feet of ash, preserving countless skeletons of prehistoric big game animals. NOVA joins the discoverer of this treasure trove to learn what life was like when a lot more than buffalo roamed the West.
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Episode 1: Codebreakers
Episode 2: Dinosaurs of the Gobi
Episode 3: Daredevils of the Sky
Episode 4: Journey to Kilimanjaro
Episode 5: Can Chimps Talk?
Episode 6: In Search of Human Origins, Part One
Episode 7: In Search of Human Origins, Part Two
Episode 8: In Search of Human Origins, Part Three
Episode 9: Can China Kick the Habit?
Episode 10: Aircraft Carrier!