Well d'uh, Steve

Stephen Hawking, heir apparent to the niche Carl Sagan used to occupy, declared this week that - not only is time-travel consistent with the laws of physics - but also that he can think of three ways that it might be accomplished. You can read the MSNBC article about it here. . Am I supposed to be impressed? I've been time- and dimension-traveling for... well, for many indeterminable eons. It's hard to determine/describe lengths of time when you're a chrono-hopper. . Alternatively, Hawking could've just asked his neighborhood cow. . One last thing, Steve. You seem to dismiss time-travel to the past because of the cause-effect conundrum. For instance, that it's impossible because you could conceivably go back and kill your mother before you were born. . How silly. The fact that you are currently here, in the present (whatever that means), demonstrates that your little "impossible situation" doesn't/didn't/won't ever occur. I don't think the physics of time-travel gives a hoot about some hypothetical chrono-situational anomaly.