The Big Bang Theory — The Big Bang Theory Theme 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 mystery,
That all started with the big bang (Bang)!
[ Lyrics from: http://www.lyricsty.com/the-big-bang-theory-the-big-bang-theory-theme-lyrics.html ]