Mysteries of the universe: Expansion and gravity (Encore)

Spiral galaxies NGC 2207 and IC 2163 (Photo credit: NASA/CXC/SAO/STScI/JPL-Caltech)

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!