The Theory
A diagram of the Big Bang Theory
The theory is that the whole universe used to be a golf ball sized spherical shape. That sphere was very, very dense. It expanded into our whole universe and continues to expand today. The video below explains more.
In other words:
Our whole universe was in a hot, dense state and nearly 14 billion years ago expansion started WAIT.
The earth began to cool, the autotrophs began to drool, neanderthals developed tools, we built the wall WE BUILT THE PYRAMIDS! Math, science, history, unraveling the mysteries that all started with the big bang! BANG
- Theme song for "The Big Bang Theory"