If a balloon was filled by a vacuum -- rather than helium or air -- would it float? Check out this HowStuffWorks podcast to learn the science behind balloons and vacuum.
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BrainStuff Classics: Why Is Cramming the Worst Way to Study?
05:55

How Can We Separate Ninja Fact from Ninja Fiction?
07:38

How Did 'Bourgeois' Become a Bad Word?
07:36