John Urschel is studying for a PhD in mathematics - and played three seasons of professional football in the NFL. Mind and Matter - by John Urschel and Louisa Thomas - on Amazon - https://amzn.to/2Yqiyw0 Book on the publisher's website - http://bit.ly/UrschelBook John's math publications - http://math.mit.edu/~urschel/papers.html John's NFL stats - http://www.nfl.com/player/johnurschel/2543845/careerstats With thanks to MSRI - https://www.msri.org Meyer Sound - https://meyersound.com/ Numberphile merchandise - https://www.numberphile.com/merchandise PODCAST TRANSCRIPTS: https://www.numberphile.com/podcast-transcripts