About this episode
Does the universe go on forever? Or does it have an edge? Jack and Kate have a few ideas about how to find out, involving a GoPro and a rocket. We ask astrophysicist Katie Mack if the universe is infinite and if a robot explorer will ever send us a selfie from the very edge of its expansion. Her answer will boggle your mind. Visit tumblepodcast.com to learn more! Subscribe on iTunes at https://itunes.apple.com/us/podcast/the-tumble-podcast/id984771479, and leave us a review. Music by Marshall Escamilla and Podington Bear. Photo of a distant galaxy cluster courtesy of NASA, ESA, CXC, NRAO/AUI/NSF, STScI, and R. van Weeren (Harvard-Smithsonian Center for Astrophysics).