Professor Mike Merrifield discusses diagrams popularized by Florence Nightingale. Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor) More links & stuff in full description below ↓↓↓ Professor Mike Merrifield is an astronomer at the University of Nottingham, UK. He's updating his own Nightingale diagram regularly on Twitter: https://twitter.com/AstroMikeMerri More videos with Mike: http://bit.ly/Merrifield_Playlist Sixty Symbols: null Deep Sky Videos: null The Greatest Ever Inforgraphic: https://www.youtube.com/watch?v=3T7jMcstxY0 Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. https://www.simonsfoundation.org/outreach/science-sandbox/ And support from Math For America - https://www.mathforamerica.org/ 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 Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Numberphile T-Shirts and Merch: null 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