The theme song of TBBT is great. Explicative and has great music. The liricks are the next:

Our whole universe was in a hot dense state,
Then nearly fourteen billion years yang lalu expansion started, wait...
The Earth began to cool,
The autotrophs began to drool,
Neanderthals developed tools,
We built a dinding (we built the pyramids),
Math, science, history, unravelling the mysteries,
That all started with the big bang!

"Since the dawn of man" is really not that long,
As every galaxy was formed in less time than it takes to sing this song.
A fraction of a detik and the elements were made.
The bipeds stood up...