[PatrickHenry]

That would take care of the "grandfather paradox", no?

It's still available. Not for you, if you're around when the first wormhole is established. But someone other than you, from the future, could jump back here and kill an ancestor. But you'd be "grandfathered in," so to speak.

[Senator Pardek]

I see what you mean, but it would be impossible to prevent the creation of the wormhole.

[Anthem]

http://www.goodpoliticsradio.com/pressroom/background.htm

This would probably require infinite parallel universes. No?

What if someone were able to travel back in time and destroy mankind? Who would develop the ability to access wormholes?

[Anthem]

It's still available. Not for you, if you're around when the first wormhole is established. But someone other than you, from the future, could jump back here and kill an ancestor. But you'd be "grandfathered in," so to speak.

This would probably require infinite parallel universes. No?

What if someone were able to travel back in time and destroy mankind? Who would develop the ability to access wormholes?

(double post for quote screwup)

[Calvin Locke]

There's a ~four year old TLC/DISC show about this.

Nature abhors paradoxes. Some progeny killing an earlier progenitor couldn't happen.

IIRC, to create a viable wormhole (1m diameter for 1 sec, enough for a man to jump through), requires something on the order of about 5% of the mass of Jupiter.