I’ve been doing a little big bang thinking. If the big bang had a point source then you’d think the expansion would be spherical.
Although there is more than one shape suggested for what resulted, maybe it threw out it’s contents in a shell like a nova. Mabey it’s just a big ball.
Our OBSERVABLE universe is spherical. It has a radius and supposedly a boarder. What if the universe we see is contained withing a shell? Don’t know if it’s worth thinking about further.
- 
I'm going out on a limb.
 - 
More cooped than nested, I think.
 - 
here's my deal...
- 
If the mass goes to another dimension...
- 
By persistent I assume you mean we have never seen one of them stop functioning.
- 
Then your theory states that the mass hangs around inside the black hole for a while...
- 
Not necessarily
- 
If the mass immediately goes there, then the mass immediately is not here.
- 
So after a black hole is formed, what happens to the additional mass it consumes?
- 
It's mass, demonstrably, is here.  The effects of its mass are apparent.
 
 - 
It's mass, demonstrably, is here.  The effects of its mass are apparent.
 
 - 
So after a black hole is formed, what happens to the additional mass it consumes?
 
 - 
If the mass immediately goes there, then the mass immediately is not here.
 
 - 
Not necessarily
 
 - 
Then your theory states that the mass hangs around inside the black hole for a while...
 
 - 
By persistent I assume you mean we have never seen one of them stop functioning.
 - 
Well,
 
 - 
If the mass goes to another dimension...
 - Well, this Universe has at least one boarder, me!