53,360 notes February 16, 2012 Astronomy professor:Please explain the big bang theory. Me: Astronomy professor: Me: Astronomy professor: Me: Astronomy professor: Me: Astronomy professor: Me:Our whole universe was in a hot dense state, then nearly fourteen billion years ago expansion started. Wait... the Earth began to cool, the autotrophs began to drool, Neanderthals developed tools, we built a wall, we built the pyramids!! Math, science, history, unraveling the mysteries, that all started with the big bang! HEY!