STEMerch Store: Support the Channel: PayPal(one time donation): This is a follow up to the last video ( ) regarding higher dimensional shapes. Here we answer why there can only be 5 shapes in 3 dimensions that meet certain criteria (as listed in the video). Instagram: Twitter: Join Facebook Group: 3blue1brown Video: ►Support the Channel Patreon: PayPal(one time donation): ►My Setup: Space Pictures: Magnetic Floating Globe: Camera: Mic: Tripod: Equilibrium Tube: ►Check out the MajorPrep Amazon Store: