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Engineers and NASA scientists aid an all-out effort to save 33 trapped Chilean miners.
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The Mystery of the Milky Way: How telescopes have expanded our view of the universe

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Can markets be rational when humans aren't?
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NOVA  ·  Episode 3709

Hunting the Edge of Space: Part 2

04/12/2010

The Ever-Expanding Universe: How telescopes have expanded our view of the universe

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