There are all kinds of volcanoes all over the world, but how are they formed? And how do they erupt? To find out, we’ll travel to the center of the Earth, and we’ll meet a NASA robot that’s going on a very special volcano mission.

It's time for the....Mystery Sound Extravaganza!
34:01

Why do we have Daylight Saving Time?
23:55

New Brains On tour dates added: St. Paul, Atlanta, Portland -- and more!
01:03