To be honest, I did not like that guys answer. He should have made it simple so people could understand it easily and answer it in the framework most people think.
I have asked this question all my life and Youtube always sends me lectures on what happened before the big bang and what is outside our universe.
And of course after I watch them they always say:" we don't know'-lol.
Here is how I would explain it. First we know our universe has some sort of limit because we know how long ago the big bang happened and how fast it is expanding, so that is a matter of simple math.
My thinking is that there is surly a much larger total reality than just our universe, which probably spawned us, and I base it on "probability".
We can all comprehend 13.8 billion years, and when we weigh that against infinity, well it is likely our universe popped up from some other physics outside our universe.
My guess is that our universe was created by a vacuum fluctuation, but that is a guess based on nothing much, it could be anything like a black hole.
Alan Guth once said:" try to think of nothing, good luck". So IMO, our universe is not expanding into anything per se, it is just creating more universe, pushing out, as there is nothing to stop it, so it just keeps expanding.
The totality of "everything" may even be infinite as that is a concept beyond our thinking, just like why is there something rather than nothing!!?? |
