Many things change over time.
Humor me. What this are you referring to?
And, what does it look like with respect to what yours would look like if you were to imagine one.
While we are at it, what is this universe people speak of? Do we really have one?
From what little Ive read about others having theorized about it, it does not seem unlike imagining, on steroids, but i have never seen one in person.
It is written that God spoke his world into existence. Its food for my thought whether or not his spoken word was followed by a big bang. Tolkien’s was sung into existence, somewhat retroactively. I do not know if his had a big bang but it did have a big ka-ching, still echoing to this day.