If God doesn’t exist, then how do you explain the presence of the universe?
NB: You cannot start your theory with an imaginary “big bang” unless you’re prepared to explain how and why this “bang” was triggered. For example, if this “bang” was a release of mechanical, chemical, or nuclear energy, then you must be able to explain WHERE the necessary elements came from, and WHAT triggered this ignition.

Regards, GR.