Was big bang a white hole?

Maybe the first things which got into our universe were sent to us from another parallel universe by a black hole.

P.S- This is my theory, you don't necessarily need to agree to it :')

You'll first need to show some kind of process where the early universe could produce such a phenomenon. AFAIK, there isn't one, and that's why most don't take white hole formation that seriously.

 

Take a look at this paper, and come back with some support for your idea.

 

You don't have a theory. This is an idea you need to find some evidence for. It's good that you're asking questions rather than telling us this is the way it is, so good job on that. And welcome back after a long suspension. Let's talk some science here.

You might be interested in the work of Nikodem Poplawski: https://www.insidescience.org/content/every-black-hole-contains-new-universe/566

 

But note the big difference: what you have is a vague idea, what he has is a theoretical idea that can be justified with math and, potentially, evidence.

I should note Poplowski afaik has dropped the whitehole scenario