Our Pi Playlist (more videos): http://bit.ly/PiPlaylist Professor Ed Copeland on a strange occurrence of Pi involving bouncing balls. More links & stuff in full description below ↓↓↓ More details from Ed at: http://www.numberphile.com/pi/Pi_Balls_Ed.pdf See his calculations at: http://www.flickr.com/photos/numberphile/6976718861/in/photostream Check out a computer simulation at http://periodicvideos.blogspot.com/2012/03/pi-and-simulated-bouncing-balls.html (made by a viewer!) OUR PI VIDEOS --- ALEX BELLOS AND ROGER DISCUSS ITS HISTORY https://www.youtube.com/watch?v=yJ-HwrOpIps BOUNCING BALLS AND A STRANGE PROPERTY https://www.youtube.com/watch?v=abv4Fz7oNr0 MATCHES HELP FIND PI https://www.youtube.com/watch?v=sJVivjuMfWA THE SOUND OF PI https://www.youtube.com/watch?v=wPn4tgmU8ek NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: null Other merchandise: https://store.dftba.com/collections/numberphile