The Pacific watching Ruzzia throw missles at it: This is getting out of hand, now there are two of them!

You're thinking of parallel universes. The idea here is that our perceived universe is a superposition of many possibilities. As if you have many translucent pictures of the same thing, but with very tiny variations. Put them all together on top of each other and you and up with a picture of the most common features. That is the perceived reality.