Our universe was created by a star in another universe collapsing and forming a black hole. That’s what caused the “big bang.” Black holes in our universe create/contain other universes. Sadly, travel between universes is impossible because it takes an infinite amount of time to approach the event horizon of a black hole. But still, it puts things in a different perspective, doesn’t it?
https://www.newscientist.com/article/mg20727703.000-every-black-hole-may-hold-a-hidden-universe.html