"MadGiant however, if you take into account quantum mechanics, these UFOs can be from a parallel universes an event happeing at the same time in space...crossing over........" - mind
It's a good answer. You might be right. But I guess I prefer my universe and quantum properties Loopy, not Stringy.
I think that you are making reference to the many worlds interpretation from quantum physics and every universe take place in the same space and time as our own universe, but you still have no way to access them.
And every moment of your life, every decision you make, is causing a split of yourself into an infinite number of future selves, other universe.
Am I correct? If so:
How much energy do you think is required to jump from one universe to the next?
Could you jump back and forth or do you have to jump a certain amount of universes to get back to yours.
I don't know, multiverse give me the willies.