The sounds whales make underwater are super cool, and also very important for them to locate prey, navigate and communicate with each other. We find out how they make those sounds and what scientists think they mean.

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