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Alan Alda's Challenge to Scientists: What is Time?

Posted: December 14, 2012

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Alan Alda founded The Flame Challenge last year to promote better science communication, and he started by asking scientists to come up with a kid-friendly explanation for a flame. Now, Alda is back with round two of the popular contest, and kids want to know: What is time?

Copyright 2014 NPR. To see more, visit http://www.npr.org/.

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