Video explaining the elliptical pool table: https://www.youtube.com/watch?v=4KHCuXN2F3I More links & stuff in full description below ↓↓↓ And some extra footage: https://www.youtube.com/watch?v=pulp55gTKGE Alex Bellos' Loop Table website: http://www.loop-the-game.com/ Alex discusses the topic in his book Alex Through the Looking-Glass (UK) and The Grapes of Math (US)... http://bit.ly/BellosBooks Support us on Patreon: http://www.patreon.com/numberphile 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 Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile Videos by Brady Haran 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