Ed Harriss discusses the plastic ratio - more amazing than the golden ratio? You decide! More links & stuff in full description below ↓↓↓ See our golden ratio videos: http://bit.ly/Golden_Ratio Previous video with Ed (Heesch Numbers): https://www.youtube.com/watch?v=6aFcgATW9Mw Ed Harriss is online at http://maxwelldemon.com/ and on Twitter at https://twitter.com/gelada The Plastic Ratio Callipers were made by Eugene Sergeant: http://www.eugenesargent.com/ 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. https://www.simonsfoundation.org/outreach/science-sandbox/ And support from Math For America - https://www.mathforamerica.org/ 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. Editing and animation by Pete McPartlan Patreon: http://www.patreon.com/numberphile Thanks to all our Patrons, including: Arjun Chakroborty Jeff Straathof Christian Cooper Ken Baron Susan Silver Yana Chernobilsky James Bissonette Bill Shillito Dr Jubal John Tom Buckingham john buchan Joshua Davis Ian George Walker Tracy Parry Arnas Steve Crutchfield Valentin-Eugen Dobrota Bernd Sing Jon Padden Alfred Wallace George Greene Charles Southerland Adam Savage D Hills Ben Eric Mumford Igor Sokolov Andrei M Burke Bodhisattva Debnath Jerome Froelich Robert Donato Numberphile T-Shirts: null 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