Inca Knot Numbers - Numberphile
Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ Check out the Language Lover's Puzzle Book) on Amazon: https://amzn.to/3oU0wjT Or a signed version from Maths Gear: https://bit.ly/Language_Lovers More Alex on Numberphile: http://bit.ly/Bellos_Playlist Alex's own website with links to all his stuff: http://www.alexbellos.com See Alex on another forgotten number system: https://youtu.be/9p55Qgt7Ciw The Ancient Quipu - L Leland Locke: https://amzn.to/37RJfzZ 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 Video by Brady Haran and Pete McPartlan Patreon: http://www.patreon.com/numberphile Numberphile T-Shirts and Merch: https://teespring.com/stores/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Thanks to these Patreon supporters: Arjun Chakroborty Ben Delo Jeff Straathof Ken Baron Yana Chernobilsky Andy B James Bissonette Jubal John Jeremy Buchanan Steve Crutchfield Adam Savage Ben White Andrei M Burke RAD Donato Matthew Schuster Nat Tyce Ron Hochsprung Mitch Harding Ubiquity Ventures Mateusz Swiatkowski John Zelinka Tom Marshall Jesús Salsero Gnare Jordan W Oja Tracy Parry Ian George Walker Arnas Bernd Sing Valentin Alfred Wallace Charles Southerland Kristian Joensen Bodhisattva Debnath Alex Khein Kermit Norlund That Asymptote Mirik Gogri Sign up for (occasional) emails: http://eepurl.com/YdjL9
