If you were driving at the speed of light and turned on your headlights, what would happen? Twitter: Instagram: Sources and extras below!! Thanks to Jude for asking me this question on twitter! “The Life of the Cosmos” by Lee Smolin: “In Search of the Multiverse” by John Gribbin: “The Pig That Wants to be Eaten: by Julian Baggini: Relevant MinutePhysics videos: light slowing down in glass: a different perspective from Sixty Symbols about light slowing down: Why is “c” the speed of light? Car at light speed: Light speed is the same in all inertial frames of reference: #c1 Relativistic addition of velocities: @6/Relativistic_Addition_of_Veloc doppler shift: : #mediaviewer/File: Relativity: ~jh8h/Foundations/ Light speed and catching-up to light. ~jdnorton/Goodies/Chasing_the_light/ Other good relativity resources: Light echo footage: “fine-tuned” universe: Irrational numbers: a million digits of pi: THERE'S MORE VSAUCE!! Vsauce2: Vsauce3: animated drawings by Guy Larsen rocketship animation by Eric Langay