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Surprising fossils from northeastern China spur a debate over how birds evolved.
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What happened to American pilots shot down over Korea half a century ago?

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The Mofu people of Cameroon rely on an an army ant to protect their homes and crops.
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NOVA  ·  Episode 3501

Astrospies

02/12/2008

An elite corps of U.S. astronauts is trained to gather intelligence on the Soviets.

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