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How can we best prepare for the most lethal volcanic eruptions?
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Take a wild ride into the quantum realm, where even the impossible seems possible.

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It defines our lives, but what is time really? Have a look into its true nature.
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NOVA  ·  Episode 3819

The Fabric of the Cosmos: Universe or Multiverse?

11/22/2011

Is our universe unique, or could it be just one in an endless "multiverse"?

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