What happens in the big bang theory

There are two answers to this question.

One:

Around 13.7 billion years ago, everything in the entire universe was condensed in an infinitesimally small singularity, a point of infinite denseness and heat. Suddenly, an explosive expansion began, ballooning our universe outwards faster than the speed of light.

Two:

The Big Bang Theory is a comedy about brilliant physicists, Leonard and Sheldon, who are the kind of "beautiful minds" that understand how the universe works. But none of that genius helps them interact with people, especially women

Explanation:

I know both thingymabobbers

yes, because even though a theory has a  lot of evidence to support it, it is not always true