Tadashi is back with more mathematical toys - this time small tubes which do intriguing things when they spin. More links & stuff in full description below ↓↓↓ Extra footage from this interview: https://www.youtube.com/watch?v=5dJsOF7_GfY More Tadashi Tokieda videos: http://bit.ly/tadashi_vids Film by Pete McPartlan (who did the animations) and Brady Haran. NOTE: Due to the limitations of cameras and YouTube compression, we adjusted some frame rates in editing in an attempt to better show the spinning tubes as they appeared to the naked eye. Still not sure how well we did, so please take Tadashi's word for it when he describes what we see! The best thing to do is make one yourself and just try it... It's actually quite easy. 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