The Big Bang Theory Theme Song [Piano Cover]

Myself playing this wonderful theme song. Lyrics: 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! BANG *i do not own the pictures*