Cool, we're back paddling into 'other worlds' right now.

The irony in that is that to some extent this actually makes sense. After all, a being limited to 3 dimensions, can't directly look into the 4th or 5th dimension because of it's perspective. Using tricks we can certainly understand it, but that's merely the theoretical part, right?

I'm sure by the time we figure out some alien ancestors created our universe from within a different dimension, people would argue God must have made them too.

I really don't see why creation must have happened. It makes no sense at all knowing how life has been a chain reaction of evolution that can be easily understood.