Modern quantum physicists believe in parallel universes -- actually an infinite number of them; so anything that could be is.
How can this be?
The simplest explanation that I have read goes like this:
The universe is infinite and expanding. Now imagine a huge gravel pile. In that pile are three rocks all close to each other -- a red one, a white one and a blue one. If the gravel pile is big enough, you can bet that somewhere in the pile there is a set of red,white and blue rocks in the same arrangement as these three.
Now, although the number of atoms in our world is a lot more than three, it is not unreasonable to imagine that somewhere in our infinite universe, there is one or more arrangements of the atoms of our world in exactly the same order. Makes your head hurt just to think about it; doesn't it?
