I believe in other universes; don't know whether any of those is parallel.:)
there are 7 and a brand new one in creation
Multiple Universes, as in string theory...maybe. String theory predicts 11 dimensions.
Yes. Even though we will probably never find out.
They once thought Earth was flat, so anything is possible.
I know there are other places like this place that do not have a McDonald's, thank god. Progress is so beautiful. Hold the mayo!
but it makes for great thought exercizes