I mean inside a particle, such as an atom, there is a system and the system has many functional particles. Inside each of these particles there is a system and the system includes many functional particles as well, and so forth. This situation seems infinite and you can always get infinitely small things out of it, thus it seems like there's an infinitely small universe in it.
If a black hole must have a shape and volume, every time it eats enough material and collapses again the material and structure of it will be reformed stronger in order to sustain extremely more gravity?