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ScienceCasts: Why the World Didn't End Yesterday

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Published on Dec 11, 2012

NASA is so sure the world won't come to an end on Dec. 21, 2012, that they already released a video for the day after.

More questions about December 21, 2012? http://www.nasa.gov/2012/

Visit http://science.nasa.gov/science-news/... for more.

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