Squarespace (including 10% off): https://www.squarespace.com/numberphile Video features Matt Parker. More links & stuff in full description below ↓↓↓ Parker CIRCLE T-Shirts and Mugs (torment Matt at his live shows!): https://teespring.com/stores/parker-circle Parker Square: http://bit.ly/ParkerSquareTshirt More from this interview: https://www.youtube.com/watch?v=RLZCpMPIeMc More Matt on Numberphile: http://bit.ly/Matt_Videos Matt Parker's own channel: null Matt's book on 4D stuff:http://bit.ly/Matt_4D_US or http://bit.ly/Matt_4D_UK Brady's new show, The Unmade Podcast: https://www.unmade.fm/ The man who loved circles: https://www.youtube.com/watch?v=AzmUCL1OHhs Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. 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