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"If time travel were to one day be possible, why don't we run into people now who have traveled back in time to us?"
I'm not a science fiction guy, but I like this question. My first inclination was to answer that if time is a train, then we are simply at the front of the train and there's no one in the future who could "come back" to us.
But if time travel were to be invented tomorrow and I were to go back to, say, 1953, wouldn't the people of 1953 have believed up until that point were in the front of the train as well? So can we safely assume that we are in front of the train?
(Side note: Want to feel old? In Back To The Future II, Marty was transported into the future with a specific date of October 21, 2015.)
35 comments:
First time sampling the chronic? 'Cause that's some serious cannabinoid navel gazing you've posted.
Barry:
As much as I hate to say it, you are probably not interesting enough for anybody to travel back in time to see.
On 10/21/2015 we will all be at the back of the train.
DF McFly
Think of time as a perpetual line. It is completely predictable from one moment to the next. But, if we were bend (change perception) that time frame between the two points, you would have acieved the essence of time travel. The end result is a time diiferential of only a few parsecs, but proves that "time travel" is not only feasible but possible.
Read: DARPA report on Temporal Illusion, and perception of time.
And thanks, B.G. for finally giving us sci-nerds a bullet point.
Einstein said that time travel FORWARD might be possible (actually, his twins paradox lays out a simple way of doing this), but not time travel BACKWARDS.
Maybe we can travel back to 12-21-12 and fix everything.
Time travel = 750ml Jack Daniels.
Someone is on a three day bender. Barry, you been dabbling in the bath salts?
If close my eyes and pretend the 'ol battle ax is a beautiful model, is that time travel?
Anonymous 10:15:
Everyone here felt stupider for having read your BS comment, when you referenced a parsec as a unit of time. A parsec is a unit of distance, approximately equivalent to 3.25 light years.
--EmmGee
Don't we collectively travel "forward" in time once a year for DST in April?
Even though the Millenium Falcon made the Kessel Run in 12 parsecs, it's actually a measurement of distance, not time. It just sounds cool to use the word parsecs.
Time "travel" in this case is relative to the present time, not the place
"Fast enough for you, old man!"
Triple Fake Han Solo
You have obviously never got thus far into an education, or have forgotten the direct relation of pi (irrational number- 1 million digits)to time relativity in light years(light speed- 941825784 m/sec), using formulas that you obviously never studied. And honestly, I just don't have the time or patience to teach you material that is way beyond the scope of your intellect.
145 IQ, bitch.
I once dreamed that I was awake but when I woke up I had been asleep the entire time -- does that mean I'm at the front of the train?
11:15, go make 11:39 a sandwich!
I see the light at the end of the tunnel now. Someone please tell me that its not a train . . .
NERD WAR, NERD WAR!
I got a 78 Trans Am that could make a beer run in about 2 parsecs.
The real Burt "The Bandit" Reynolds
"...The issue of time travel is confusing to humans, who see the movies where parties go into the future as well as the past. Would that not be the case, as if one can go in one direction, why not the other? One cannot travel into the future, except in small increments, hours at most. Leaping into the future is a fiction. One can travel into the past, as that is a trail marked in the substance of the Universe, strands that can be unwoven and rewoven, a rope that stretches back endlessly. The past has markers. Grip points. It has been built, where the future has not yet been built. A phrase much in use is the Time/Space Continuum. This is simply a way of stating that matter may be in a different place, or space, depending on the time, and that matter leaves a trail, or continuum, over time. You can equate the Time/Space Continuum to our term strands, being woven and unwoven, which we consider more exact as it refers to the webbing that takes place. ..." Source ZetaTalk
Search the site for more about time travel, the speed of light, black holes, etc. ...
11:39, Funny, I thought a 145 IQ would have afforded you better social skills!!!
You must be bored this afternoon.
I'll get back to you on this sometime in the near future.
Anonymous 11:39
My education (undergraduate, graduate, trade, and personal in scope) is quite satisfactory, and I still remember how to calculate parsecs from parallax. Doc Shepley at UT actually taught that lesson pretty well, so that we pimply-faced freshmen could retain it decades later. Thus when someone uses a unit of distance to describe time ("The end result is a time diiferential [sic] of only a few parsecs, but proves that 'time travel' is not only feasible but possible."*), one of his old students like me will probably get kind of a tic, and call you out on it. I'd have mentioned it in private, but you didn't leave your email.
What's confusing is how you believe that it's worthwhile to continue to throw out silly buzzwords and provably inaccurate statements (we've found over 10 trillion digits to pi, meaning that you're off by at least 10^7), and defend a silly comment.
Look, we've all made silly statements before. I'm sorry that I declared that yours made us all stupider, okay?
--EmmGee
Not as smart as I used to be.
________________
*Note: Possibility is an easier hurdle to make than feasibility. "Feasible" means convenient or likely. Thus, your statement "not only feasible but possible" makes little sense.
an earlier post mentions a timeframe "of only a few parsecs", as if that's an almost microscopic amount. A later post (not sure if it's the same person) mentions light years - the method for measuring parsecs - as being in excess of 941 Million! meters per second. Now, I'm no mathemagician, but that sounds like it's a really, really big number.
Not sure what pi has to do with this, unless you're talking about that scene in MIBIII where Agents K and J solved a problem by eating pie, and the plot involved space travel
“It is impossible to travel faster than the speed of light, and certainly not desirable, as one's hat keeps blowing off.”
Triple Fake Woody Allen
1:56 pm has Mxcreep written all over it!
1:56 PM- You should try to get your money back, you got screwed.
1:56, Spot on or Catfish the Movie she has 9 diffrent call signs
Gotta get back in time.
"I'm the way to happiness. I'm the way to peace. I can unite cultures. I can eat planets."
-Time Traveler Tom Cruise
145 was at one time a high I.Q. Now it is about average. Except , of course, in these comments.
I base that on the fact that I feel average or below. I really don't think I am better than you.
I think I will go flux my capacitor.
Thanks for letting me troll today! The knee-jerk reactions were great! HAAAAHHAHAHAHAHA!!!
11:39 AM
I will simplify Time Travel in a way that will make sense to you all.
In order to Travel backwards in Time,some means to collect and store every atom,quark,nutrino,electron's movement,position,time and place in the universe would have to be designed that could then also regenerate these events would be quite impossible by any civilizations ability due to the inconceivable power/mechcanic's required.
Time Travel into the future is however very possible through a process known as Time dialation.
Anyone who cannot time travel is using the wrong vehicle.
Try marijuana. It works best
Oh Baby! Oh Baby! Oh BAAAAAAAAABY! OHOHOHOHOH!
Time moved for me. Did it move for you?
DF Hugh Hefner
on my honeymoon
or as I refer to it usually, "Thursday".
Barry, you need to put down the crack pipe.
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