I haven't put much thought into this question (and don't have much evidence for it, if any at all), so please poke holes in it, it's fun to see what you think .
I've been thinking recently that our universe is a 4D object/shape.
Whenever in my physics class, or on the internet, someone asks why everywhere is the centre of expansion for the universe, the analogy I hear a lot is that of a balloon inflating (I'm not going to explain it, so feel free to watch this video https://youtu.be/i1UC6HpxY28?t=57).
Basically could our universe be the same concept as the balloon inflating; a 4D object expanding and our 3D world is on the surface.
I think this would also would explain the fact that there is no centre to the universe.
It's just a thought, but I would like to hear your opinion on it.
