Edit: Does anyone know the current thinking of the odds that information could be able to travel faster than light, ie a wormhole? As far as I know they are very slim.
An Einstein-Rosen Bridge is purely theoretical, and mostly a way to understand the equation of general relativity better. The equation requires you to set a few parameters that we have no way of determining currently, and that describe the structure of the universe. By setting those parameters just right, we can imagine really strange things, such as time travel or a wormhole.
But even if those parameters allowed a wormhole, having a traversable wormhole requires exotic matter with negative mass, another thing that we have no tangible proof exists.
In other words, general relativity is so general that it allows behaviour that can't exist in the real world. Computing the odds that information could go through a wormhole is like computing the odds that God exists.
There is a galactic consent that nobody will ever be able to actually visit each other.
And of course, this is pure science fiction :)
The scientific name for a wormhole is an Einstein-Rosen Bridge - named after Nathan Rosen and, obviously, Albert Einstein who conceived the idea.
There are other suggestions for "faster than light" travel, but FTL is a bit of a misnomer because the concepts of FTL aren't about having a velocity that's greater than c (the speed of light in a vacuum), it's about warping or cutting through the fabric of space in a way that makes the distances shorter. A wormhole is just one theoretical method of jumping those distances via a shortcut.
The problem is that in science, if you assume things in a naive way ("What goes up must come down." "Planets travel in circles") you're almost certainly wrong - because the details of physical reality are usually counter-intuitive and unexpected.
So what we really know is:
1. Spacetime is a thing. It has bulk properties described by GR. 2. Er - that's it.
We don't know what spacetime is made of, or what you can do with the things it's made of, or what their properties are.
So I'd classify this as "definitely not known due to lack of knowledge" rather than "definitely not proven."
Proposals like Quantum Dynamical Triangulation, Causal Sets, and Loop Quantum Gravity are beginning to ask what spacetime is made of, but they're barely in their infancy.
The one thing they have in common is the idea that there's a network of - something... - and the reality we recognise propagates across the network.
If the elements are discrete - and they almost certainly are, because of the Planck limit - there will be some moment where an element changes state.
How fast does that happen? What's the mechanism? What limits the state changes? (Adjacency? Some other property?)
It's completely mysterious, and I think it's unwise to make definitive statements about it until it stops being a mystery.
