Watch PBS Idea Channel Collab: https://www.youtube.com/watch?v=OQxEGLOFyto *** SOURCES AND LINKS *** Mass Hysteria http://goo.gl/HCO5mr http://goo.gl/QIPz9Z http://goo.gl/nERz7Z Outbreak!: The Encyclopedia of Extraordinary Social Behavior https://goo.gl/2DpRAL Salem Witch Trials http://goo.gl/52pVNv http://goo.gl/PfHgTG http://goo.gl/aDgXac Dancing Plague of 1518 http://goo.gl/SCwQgE http://goo.gl/hGtME1 http://goo.gl/ms16PW Tanganyika Laughter Epidemic http://goo.gl/4rsm64 https://goo.gl/9cT43c Strawberries With Sugar Virus https://goo.gl/fVl0p5 http://goo.gl/tpvJg1 Genius Blamed For School Sickness http://goo.gl/uyG4gH ***************************************­* Vsauce2 Links Facebook: https://www.facebook.com/VsauceTwo Twitter: https://twitter.com/VsauceTwo Written, Produced and Hosted by Kevin Lieber Instagram: http://instagram.com/kevlieber Twitter: https://twitter.com/kevinlieber Website: http://kevinlieber.com/ Production Assistant Michael Watson https://twitter.com/MichaelDWatson1 Animation Supervisor Eric Langlay https://www.youtube.com/watch?v=QpbXVXPFAVI Animation by Lulu Jiang http://www.lulujiang.com/ Sound Design by Jay Pellizzi http://hothead.tv/staff-studio/ Contributing Editor Matthew Tabor, Koala Fight Media http://koala.fm/ Wardrobe By FiveFour Use the code "Sauce" to get $15 off first month subscription. https://www.fivefourclothing.com/new/ Vsauce: null Vsauce2: null Vsauce3: null WEsauce: null