This topic sparked my interest, let's see if I can make more sense of it for myself (being mostly educated by popular sceince programs, which are undoubtedly too simplistic)
cavediver writes:
The trouble is, the detail is all in the mechanism of your 'simultaneous travel'.
Let's say they went through a wormhole. How does this effect their experience of time? If they go back though the wormhole, will they have aged any differently from the ones that stayed behind?
I hunt for the truth
I am the one Orgasmatron, the outstretched grasping hand
My image is of agony, my servants rape the land
Obsequious and arrogant, clandestine and vain
Two thousand years of misery, of torture in my name
Hypocrisy made paramount, paranoia the law
My name is called religion, sadistic, sacred whore.
-Lyrics by Lemmy Kilmister of Motorhead
™ Version 4.2