Moved from an inappropriate location, with apologies!
Be careful about the Big Bang. It is completely against established science, such as the Law of Conservation of Matter (matter/energy), although who is to say that this applied at t = 0. This t = 0 should be distinguished from BBT (Big Bang Theory) which ceases to be science about a trillionth of a second short of t = 0. This is because science (Einstein) has equations involving division by zero which
mathematics requires to be infinity.
My personal view is that BBT is ridiculous. I favour a cyclic Universe, of which there are several variant theories. Instead of the singularity (which is the centre of the scientific problem - requiring infinite temperature and density) there is a NON-infinite nexus, leading to another
phase of the Universe. Critics say that there is a "philosophical" problem, in that there must have been a start somewhen.
But see this:
Division by zero = infinity
Ask away if you have any questions on this.
Cat