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The "Car Talk" guys look for a new breed of clean, fuel-efficient vehicles.
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Experts zero in on what separates humans from our closest living relatives. Ape Genius...

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The story of the harnessing of cold and the race to reach the lowest temperature possible.
NOVA  ·  Episode 3508

Cracking the Maya Code


The story behind the centuries-long decipherment of ancient Maya hieroglyphs.

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