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

from National Public Radio

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?

Broadcast Dates

• Talk of the Nation, December 14, 2012