From a mathematical point of view there can and is many different infinities that exist. I'm curious what happens when we try to use a physical infinity in cosmology. I'm not going to lie I don't even think my brain is capable of comprehending this but can two physical infinities exist simultaneously? How can two objects which occupy the same volume both be infinite at the same time? If they can't both be infinite at the same time then how can it be that two, three, four or 10500 universes can exist, all of them being infinite and all of them existing at the same time? If one object is infinite in volume then it stands to reason that there is not more volume left over for another another to coexist. If it is somehow possible for another infinite universe to coexist, then where is it located? In some sort of external meta-space or something?