Quote:
Originally Posted by shawnhcorey
They do. To understand why is to review Special Relativity.
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You can have
permanent wormholes as a spatial feature and they just mean space has a weird shape (though we'd probably see astronomical evidence); you aren't actually going faster than light, it's just that the shortest distance between two points isn't the obvious one. However, once you can create them and move them around, you've got an issue.
In general it's possible to have a network of wormholes in a region and there are quantum effects that can be justified as causing collapse of links that cause causality violations (basically, once a closed time-like loop becomes possible, an infinite number of virtual particles start trying to follow the loop, resulting in feedback that will do... something. Such as the wormholes collapsing or exploding).