On the whole "infinity" thing:

Whether or not there are other universes is purely speculation. Whatever they may be or whatever may go on in them is purely speculation. I can not speak as a physicist beyond this.

You've essentially said, "Imagine there is a place where physics as you know can be anything... anything at all."
"Now... can I have ABC, or XYZ?"
And my answer is, "Sure... I don't see why not. You just described cartoons."

The mere presence of infinity doesn't imply anything other than the ability for humans to imagine an unending number line... and to give a name to the unendingness of it.

Just because there is a name for a thing, that doesn't make the thing a thing. Pegasus


Sometimes in physics, infinity/infinity = 1, provided they're both "cooporative" infinities. However, in general, infinity/infinity is a nonsensical statement, because infinity is not a number, it's a description of unendingness.

It is common when solving integral equations to integrate over intervals which extend to +/- infinity... which is a bit abusive of the term, but yields good results... so... yeah.

Infinity: Handle with Care