Tau replaces Pi

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

Should Pi be replaced by Tau? Professor Phil Moriarty thinks so.

See our collection of Pi videos at: http://www.youtube.com/playlist?list=PL4870492ACBDC2E7C

See ViHart's Tau video at: http://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/