It's all theoretical. BUT.... I have been trying to follow some of the subatomic research that they have been doing. In layman's terms (which is all I can offer on this subject), scientists have been mystified by how certain subatomic particles can be in two places at once. Quantum Mechanics/physics are starting to suggest that there may be another set of laws for physics at the subatomic level, including faster than light speeds (it explains why certain particles can be observed in two places at once).
It's all nerdy stuff. But imagine a universe within the confines of an atom. Whoa! Now scale up that atom to the size of our solar system. Beam me up, Scotty.
We'll be long dead before these fun things come to pass. Either that, or we'll kill ourselves figuring it out. Either way, Weeeeeeeee! lol
True, but I want to see what the state of the art is in 2060. I should be pushing about 20 years old around then ;-)