Should Pi be replaced by Tau? Professor Phil Moriarty thinks so. More links & stuff in full description below ↓↓↓ See our collection of Pi videos at:    • Pi on Numberphile   See ViHart's Tau video at: https://www.youtube.com/watch?v=jG7vhMMXagQ Tau manifesto: http://tauday.com/ Professor Phil Moriarty is a physicist at the University of Nottingham. His "scrawls" from this video can be seen on Flickr at: http://www.flickr.com/photos/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 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