Have you ever wondered what’s beyond the edge of the universe? Or better yet: IS there an edge of the universe?

And what does it mean that the universe is expanding? In this episode we ponder some big questions from Brains On listeners about the vastness of space. We also cover what we know and don’t know about gravity.

All that plus a brand new mystery sound, Moment of Um (do we get taller when we jump?) and honor roll!

Brains On! is an award-winning audio show for kids and families from American Public Media.