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An investigation uncovers the human failures and design flaws behind the 2003 Columbia...
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E.O. Wilson's fascination with little creatures has led him to some very big ideas.

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The "Car Talk" guys look for a new breed of clean, fuel-efficient vehicles.
NOVA  ·  Episode 3511

Arctic Dinosaurs


Experts in Alaska investigate how dinosaurs managed to thrive in polar regions.

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