[lbryce]

As noted in the keywords, the grandfather paradox has always relegated the possibility of time travel to the genre of science fiction. The premise of the grandfather paradox seemed to have settled the question of time travel with the sceanrio in which someone goes back in time and kills his grandfather, which ultimately renders him non-existent and if so then he wouldn't be around to kill his grandfather which would then have his grandfather survive, securing the time traveler's existence as descendant, and so going back in time to kill his grandfather.....

And that speaks for any attempts at time travel as means to changing history. So, you might as well conjure up some other scenario for the failure of Obama-Don't-Care.

[Oberon]

I'd be more impressed with this conclusion if the scientists in question could tell me with some degree of certainty just what a photon is.

[Pollster1]

This merely proves (if correct) that a packet with zero rest mass cannot travel faster than light. That’s has been known from the math behind special relativity for a long time.

[Fantasywriter]

This can’t be true. I saw the movie Peggy Sue God Married—not to mention Back to the Future. Time travel all over the place. It happened in one of Ray Bradbury’s short stories too. How many examples do I have to give?

[Jeff Chandler]

Dammit. I wanted to go back and get some cars.

[DannyTN]

Agent J: There's no such thing as time travel.
Agent O: Well, there is.
Agent J: No. There's not. Because if there were, a class-one senior agent such as myself would have been made aware of it, wouldn't he have?
Agent O: Were it not classified and way above his pay grade.
Agent J: You know what? I need a pay raise.

[JRios1968]

I read about this in June 2045.

[I want the USA back]

Yes, of course, but this will not put an end to the wild-eyed believers who are absolutely convinced that “time travel” is possible.

Time is the measurement of motion. (St Thomas of Aquinas. Right then, right now, right always.)

As such, there is no way to travel in it.

[1010RD]

Tell me that story again, Grandpa!

[Lx]

Did someone forget to tell this guy?

[Argus]

So that means we’re STUCK here??!!!!

[smoothsailing]

Maybe they should test a faster proton. The one they picked might have been an out of shape overweight smoker.

[Billthedrill]

Yep. That’s what we thought in 2025, too.

[I want the USA back]

“The possibility of time travel was raised 10 years ago when scientists discovered superluminal — or faster-than-light — propagation of optical pulses”

And at the time I said that “time travel” was impossible.

[USFRIENDINVICTORIA]

IOW, light cannot travel faster than the speed of light.

[IronJack]

If time is simply the movement of system from a state of higher energy to a state of higher entropy, can someone explain how a particle’s ability to exceed the speed of light can equate to a reversal of entropy?

[ratzoe]

Hmmmmm...and all these years I thought ludicrous speed was faster than light..my bad.

[Fiji Hill]

I would like to travel to 2015, buy a copy of the Wall Street Journal, and then come back to today.

[Milton Miteybad]

"If you're traveling in your car at the speed of light, and you turn on your headlights...do they do anything?"

--Steven Wright

[lbryce]

A few years ago an imaginative young man conjured up an intriguing emphatically unscientific approach to testing whether time travel was possible or not. This is a true story.

He rented a suite at some hotel, summoned a gathering of friends, acquaintances under the title of "2005 First Annual Time-Travel Symposium", hoping that a true time traveler would find the novelty of appearing at the very first Time Travel Convention much too alluring to pass up.

And while the concept appeared really interesting as some sort of temporal flypaper in getting time-travelers to appear and reveal the concept as very real, it was just too hokey to actually work. Besides, what aspect of time travel did the symposium offer to actually entice a true time traveler to show up other than mere rhetoric?

Perhaps, a souped-up Delorean or two might have done the trick.

[Drawsing]

“There was a sound of thunder.”

Anyone get the above reference?