However, unlike gravity or the speed of light, time isn't "different." There's no such thing as a value of time, nor is there any variable that could make it any "different." Also, if you consider another dimension, you would already be considering all limits of time in the first place.
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Time Travel: Your Opinion
- Thread starter Dexter Morgan
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Dark Hart
Rejected by Azua
Oh, yes. That would be time travel. But going with that logic, if you could traverse thru dimensions, wouldn't time be much easier? Unless you wanted to travel to a different dimension and time, which I suppose would be possible, according to the tenth dimension video.
Dark Hart
Rejected by Azua
I would imagine that traveling through time at a single point, in a single dimension would be much easier to do than to try to get through to a different dimension. Though I remember hearing or reading somewhere that if you go back in time and change something, than an alternate reality is created and in effect, another Universe. I'll post a link to it here if I find it.
Funny new avatar.
This assumes that 1) time travel is possible, 2) it's possible to not change something when in the past 3) alternate realities can suddenly spawn. All of which are purely speculation. Well, maybe not 2. It's impossible to not change something when going to the past, you shouldn't even be there.
Dark Hart
Rejected by Azua
Well, the article I read was completely theoretics, but still an interesting concept nonetheless. Also, the reason I would choose to never go back in time, and to never have anyone ever go back in is because the fact the you shouldn't be in the time in which you would be going back to. The fact that you're there would change everything, whether we'd realize it or not.
And thanks for the Avatar comment :D7
And thanks for the Avatar comment :D7
Dark Hart
Rejected by Azua
forget this comment exists...
SSBbo
Smash Journeyman
there were two twilight zones about this. a person went back in time to stop lincolns assasination, and realized that in the present he had already gone to the past, he just didn't realize it.
the other had a guy trying to stop different events in time (ship-sinkings, assasinations, etc.), they thought he was crazy and he couldn't stop the event one way or another. so he tried to live in the past, and not change it, but trying to stop the burning of a school that his girlfriend was teaching at, he started the fire he was trying to prevent.
time travel can't effect anything.
and what about space-time? the "time" aspect of space-time helps to measure events, but cannot be traveled through. it seems odd. btw i'm not trying to focus the topic on the possibilty, i just think that its odd.
the other had a guy trying to stop different events in time (ship-sinkings, assasinations, etc.), they thought he was crazy and he couldn't stop the event one way or another. so he tried to live in the past, and not change it, but trying to stop the burning of a school that his girlfriend was teaching at, he started the fire he was trying to prevent.
time travel can't effect anything.
and what about space-time? the "time" aspect of space-time helps to measure events, but cannot be traveled through. it seems odd. btw i'm not trying to focus the topic on the possibilty, i just think that its odd.
Zero Beat
Cognitive Scientist
It may look pretty in paper like math, because mathematically you can go backwards or forwards in the three-spatial-dimensions. But time doesn’t share this multi directional freedom, time only goes forward(basic laws of physics here, it's what you're taught...>_<).
You can only "look into the past" by looking at the light reaching you from distant places, but you can't possibly go back into another planet earth and BE there while this one goes on like it's all dandy. If only wormholes were fact.
So yeah, time only goes forward, not backwards. This isn't a DVD.
Time travel is completely outrageous, I think. If you travel into the past, I'm sure we've all seen back to the Future. The entire future would be destroyed. Maybe killing a butterfly will drastically change the way the world is today, as explained in Family Guy. If Time travel is discovered, it should be unlegalized.
Wow! Glad to see some discussion on this topic so suddenly!
Jack Keiser:
See, the Grandfather Paradox demonstrates that there is a contradiction that arises when you are allowed to travel into your own past and have Free Will. Thus by removing either one of these conditions, we remove the contradiction. So there are two possibilities:
1) Time travel into the past is impossible.
or
2) You can travel into the past, but do not have Free Will while there.
The second option may seem a bit odd, but then again who's to say you have Free Will right now? See my Free Will thread for a completely separate discussion on that topic.
The way I like to best explain things is like the movie Terminator 3. I don't feel like using spoiler tags, so if you haven't seen the movie, just stop reading now.
The machine travels back in time to the present from the future to try and change things. Long story short: despite their efforts to try to change the future, their actions directly caused the future to turn out exactly the way it did. They all thought that they were going to change the future, but ended up just playing out exactly what already happened and never changed anything. Because changing the past would be contradictory. (Grandfather paradox)
Another thing that was mentioned was "dimension travel". Now... the use of the word "dimension" here is a bit misleading. In math, the word dimension has a very specific meaning. So I encourage people to not use the word "dimension" in the sense "traveling to another dimension". Instead, we can refer to them simply as alternate, parallel, or other universes (or sometimes "worlds").
Traveling to an alternate universe is not actually time travel, though it may seem like it. Imagine this: you build a house with two bedrooms next to each other and make them exactly identical. Every couch, chair, computer, etc... is exactly the same. You then proceed to live in one of the bedrooms for a month without cleaning much.
After the month, if you were to walk into the unused room, it would feel like time travel! Everything in the room would be like your room from a month ago! But obviously this is not time travel at all. The computer is not your computer, the bed is not your bed. It just so happens to look like the objects you're familiar to.
However, imagine if you did this experiment to someone who didn't know what was going on. What if you created a copy of their room, blindfolded them, and put them in the new room and told them you traveled back in time. They may just believe you. At least... the room would behave as if you had traveled back in time.
So travel into other universes isn't ACTUALLY time travel, but may wind up being the thing which is most plausible in terms of being even remotely possible.
Jack Keiser:
See, the Grandfather Paradox demonstrates that there is a contradiction that arises when you are allowed to travel into your own past and have Free Will. Thus by removing either one of these conditions, we remove the contradiction. So there are two possibilities:
1) Time travel into the past is impossible.
or
2) You can travel into the past, but do not have Free Will while there.
The second option may seem a bit odd, but then again who's to say you have Free Will right now? See my Free Will thread for a completely separate discussion on that topic.
The way I like to best explain things is like the movie Terminator 3. I don't feel like using spoiler tags, so if you haven't seen the movie, just stop reading now.
The machine travels back in time to the present from the future to try and change things. Long story short: despite their efforts to try to change the future, their actions directly caused the future to turn out exactly the way it did. They all thought that they were going to change the future, but ended up just playing out exactly what already happened and never changed anything. Because changing the past would be contradictory. (Grandfather paradox)
Another thing that was mentioned was "dimension travel". Now... the use of the word "dimension" here is a bit misleading. In math, the word dimension has a very specific meaning. So I encourage people to not use the word "dimension" in the sense "traveling to another dimension". Instead, we can refer to them simply as alternate, parallel, or other universes (or sometimes "worlds").
Traveling to an alternate universe is not actually time travel, though it may seem like it. Imagine this: you build a house with two bedrooms next to each other and make them exactly identical. Every couch, chair, computer, etc... is exactly the same. You then proceed to live in one of the bedrooms for a month without cleaning much.
After the month, if you were to walk into the unused room, it would feel like time travel! Everything in the room would be like your room from a month ago! But obviously this is not time travel at all. The computer is not your computer, the bed is not your bed. It just so happens to look like the objects you're familiar to.
However, imagine if you did this experiment to someone who didn't know what was going on. What if you created a copy of their room, blindfolded them, and put them in the new room and told them you traveled back in time. They may just believe you. At least... the room would behave as if you had traveled back in time.
So travel into other universes isn't ACTUALLY time travel, but may wind up being the thing which is most plausible in terms of being even remotely possible.
SSBbo
Smash Journeyman
exactly what i'm saying, in the present, history says you've already been there and done what you've done, so you can't change anything.
also, Zero Beat, i know you can't travel through it, I'm just pointing out its obvious difference from the other dimensions, in that you can travel through them at any speed below the speed of light, but we travel through time in on "direction" at a constant speed. (unless you're approaching the speed of light while traveling through other dimensions, but this thread isn't about light-speed).
also, Zero Beat, i know you can't travel through it, I'm just pointing out its obvious difference from the other dimensions, in that you can travel through them at any speed below the speed of light, but we travel through time in on "direction" at a constant speed. (unless you're approaching the speed of light while traveling through other dimensions, but this thread isn't about light-speed).
Are you saying that traveing into other realities could not affect a timeline?
What do you mean by "could not affect a timeline?"
If you travel to another universe, you would be free to act normally. Unlike if you were to actually travel to your own past.
If you travel to another universe, you would be free to act normally. Unlike if you were to actually travel to your own past.
Airgemini
Chansey
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I would love to be able to Time Travel.
However I probably wouldnt if given the chance because I could alter the person I am today.
If Time Traveling machines existed the world would be in chaos. Can you imagine how many problems could arise?
We would basically not have a future because of peoples actions influencing the past.
I can only imagine what the world could be like if things like this existed.
However I probably wouldnt if given the chance because I could alter the person I am today.
If Time Traveling machines existed the world would be in chaos. Can you imagine how many problems could arise?
We would basically not have a future because of peoples actions influencing the past.
I can only imagine what the world could be like if things like this existed.
Zero Beat
Cognitive Scientist
If there was one, only those who made it would have it..As they'd be smart enough not to make it public.
The only way time travel could ever be legal or possible, is if they figured out a way to turn you into a sort of phantasm or ghost while in the future or past, so you could not change anything or be seen. And if time travel was figured out, how would you be able to get back?
HyugaRicdeau
Baller/Shot-caller
...What?
Doesn't "figuring it out" mean we know how to do that?
AltF4, I was going to post this a while ago but I forgot, but when you said:
"But that is not the whole story! What really is going on is that there is not two particles colliding. But rather one particle which moves in a closed infinite loop! It moves forward in time, reaches a certain point and turns back around and goes in reverse in time (at which point we observe it as an "anti-particle") back to the original moment and begins to move forward in time again."
I personally would not interpret it like that. It is simply that "a particle and an antiparticle spontaneously pair-creating and then pair-annihilating" and "one particle moving in an infinite closed loop in time and space" are physically indistinguishable. Either description is valid.
Zero Beat
Cognitive Scientist
He means that as a ghost, you wouldn't be able to communicate nor touch anything, and thus nothing would happen; you would only be there to watch, that's all.
I just don't see what he meant by "possible." Legal, yeah I guess that's it up there^^^^^^^^^^.
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