I asked Neil deGrasse Tyson (@neiltyson) what one thing he'd ask an alien on first contact

@DrBrianKeating @neiltyson They would first teach you harmonics/music on a high mathematical level. School before went from Arithmetic (#) -> Geometry (# in space) -> Music (# in motion) -> Astronomy (# in space and in motion). Music was removed from Math and minimized to just the acoustic counterpart.