228
P H V 51C S OF THE IMPOSSIBLE
the radiation effects created by a wormhole and definitively settle the
question of how stable wormholes would be when we entered the time
machine. And even then, we might have to wait for centuries or even
longer to actually build a machine to test these theories.
Because the laws of time travel are so closely linked to the physics of
wormholes, time travel seems to qualify as a Class II impossibility.