HI #75: "World’s Most Interesting Podcast" (Patreon)

HI #75: World's 'Most Interesting' Podcast

Subscribe to the Podcast: http://goo.gl/CemLaj Grey: https://www.youtube.com/user/cgpgrey Brady: https://www.youtube.com/user/numberphile Discussion: http://www.reddit.com/r/CGPGrey/