Support Vsauce, your brain, Alzheimer's research, and other YouTube educators by joining THE CURIOSITY BOX: a seasonal delivery of viral science toys made by Vsauce! A portion of all proceeds goes to Alzheimer's research and our Inquisitive Fellowship, a program that gives money and resources directly to growing science channels here on YouTube! twitter: instagram: facebook: SOURCES BELOW: this is the video where I talk about THE SPEED OF PUSH: Big thanks to Martin Archer for help with this episode: And thanks to Guy Larsen for his shadow magic: music by and shadows faster than light: #3 making the moon brighter: sunset and earth’s shadow and belt of venus in single pics: amounts of evening-types in a city: superluminal scissors: wave animations: & phase velocity vs. group velocity: faster than light dark patches: make a light interference pattern at home: the speed of ignorance: Dunning-Kruger: “animalcules”: