How "Pac-Man" unties knots in our DNA... This is Part Two of DNA Topology featuring Professor Mariel Vazquez from UC Davis. More links & stuff in full description below ↓↓↓ Part One: https://www.youtube.com/watch?v=AxxnziuL408 Support us on Patreon: http://www.patreon.com/numberphile 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 Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile Videos by Brady Haran 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 Numberphile T-Shirts: null Other merchandise: https://store.dftba.com/collections/numberphile ADDITIONS/CORRECTIONS: 0:14: In addition to Sumners and Diao, Whittington was a key contributor. 2:26: "flouroquinolones" should read "fluoroquinolones