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Experts zero in on what separates humans from our closest living relatives. Ape Genius...
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How did the ancient Athenians build this near-flawless icon of Greece's golden age?...

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Surprising fossils from northeastern China spur a debate over how birds evolved.
NOVA  ·  Episode 3504

Absolute Zero


The story of the harnessing of cold and the race to reach the lowest temperature possible.

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