recently i have been constantly coming up with intense curiosity about the inter galactic hypothetical gateways in space known as the "wormhole"
according to what i have earned in knowledge about these tunnels is that they are a form of black hole, on the event horizon. but lets say these tunnels give a passage way via FTL travel, what universe would they exist in on the other side? would it be same as the one you left?
my question here is that, how do you possibly rip this fabric of space and time? what form of requirements does it need for anyone in this universe to rip and play with time and space?