I think if time travel is possible then it would have happened already.
Hitler would not be known and a lot of other things would not have happened.
I dont think that there is a force to make sure that time travekers cant change time. Either time travel is impossible or there are more explanations.
1. Time travel is very impossible.
2. Time travel is so far into the futher that people in that time dont even know of the exisistance of this period.
3. A lot of ristrictions which include no chaging past events.
4. It is still a black project under the books.

or perhaps we we happen to be in a multiverse where everything that has happened in the past has lead us all to this point...
even then, who's to say time travellers didn't create hitler? huh? huh?

thinking about time travel and its consequences is just one big headache lol
me, i subscribe to the whole multiverse dealio

i say time travel is not possible i cause i dont see someone from the future coming to this time who knows it may come true i dunno im cant tell the future

I think if you could travel in time who would you want to meet, would you want to go into the future and see what the world would be like, or into the past so you could see dinosaurs. There are so many things i would do and places i would go, i dont think i would be in my own time much at all.


im a very big dreamer

gotta say even if time travel was possible there would be so many risks it wouldnt be worth it u could accidently create the catalyst to the whole planets destruction just by speaking to the wrong guy bout the wrong thing lol.

One interesting thing to think about is what would happen if someone managed to create a time machine and go back in time ? If time is like a string of dimensions ... then wouldn't time travel require them to be unravled ? Would that not destroy the very essence of time ? So even if time travel could be done , it might not be a good idea to try since it just might destroy the existance of anything as we know it .

Time travel is possiable and we do it everyday! Airplaines, cars etc. we have been crunching time with aircraft and automobels for a long time. I cann't image getting this advance in transpostions be it by land, water or air and then simply stopping research.

All this talk about Time Travel kinds of reminds me....

My mother and I, this past December, flew nonstop in a 14 hour flight from New York all the way to Tokyo Japan. We left around 11 AM Sunday morning....and arrived at Tokyo on Monday afternoon around 3PM. Despite having to travel 14 hours, we lost 12 hours of time!

Later in the month, we flew from San Francisco in a 4 hour flight to New York. We got off the ground around noon and by the time we got to New York, it was around 7:30 at night. We lost five hours (or rather, we aged 5 hours less than those in New York).

Then again, when we flew on December 26 from Hong Kong to San Fran, we landed in San Fran on December 25, Christmas Day, we technically have travel back in time because we moved into a different time zone.

Strange and convoluted when you think about it.....

you cant travel through time wether it be foward or backward if time doesnt exist, time is something man created, if time were to actually exist then that whole expiriement with the atomic clocks would not have given the results it did, how can time exist if time is different for each individual depending on thier distance from gravity, time was something created in order to keep records of the past, so in all essense we are not all time travelers, we are all just living in the present...

I think time travel is entirely possible. We just have yet to discover the means of doing it.

The thought of time travel appeals greatly to me. I would love to do it, besides the fact that I strongly believe if we do travel back into time, then we disrupt everything. You change one event or one circumstance, and the world in its entirety is different. You have just screwed with the entire planet and the "future."

Time is fluid around us, I agree. Rushing past us, its like a river. I believe, if the river flows one way, we can easily dam it up or something, and change the flow of the river.

Just some of my mixed up theories.

I really shouldn't mention this....but......... the only way to experience going forward or backward in time would be to enter a parallel universe by travelling through a wormhole.........

Time is only relative in terms of how we percieve it. I think it is in a constant "state".

I know I've said this before, but damn...amazing how people feel the need to overcomplicate a hypothetical situation...but here goes...

If time travel were possible, I think someone from the future would have popped up by now...however, for the sake of arguement, we'll assume that it is. That, however, does not make any difference whatsoever to history as we know it...

If a time traveler were to go into the past and influence events in anyway, then it has already happened...It amazes me how people struggle with that fact so much Because the past has already happened, so too has the appearance of any time traveler that has been there; the very definition of time travel means that your point or origin doesn't need to have occured yet for you to reach your destination.

The past as we know it can't be altered...if it had been, then we would never have known about it, would we? As I've said before, it's probably quite possible for a hypothetical time traveler to influence events, but all they'd do is end up putting them in the direction history records them...if they did anything differently (say, someone from the year 2360 goes back in time and shoots Hitler when he was 15) then that's what history would record right now (in our case, the history books wouldn't make any mention of Hitler, and we would never have heard of him).

The multiverse theory overcomplicates the matter needlessly...I don't know what individual came up with that, but it's outright stupid coming from an educated person...if someone travels into the past, then everything they've done has already happened...they don't suddenly appear in a parallel universe, where the hell is the logic in that?

Just a couple of thoughts from me, very possibly wrong. I'm a bit of a thicko I'm afraid.

Whoever said time was linear? Just because we are brought up in a culture where we are conditioned to believe that you "move forward" from point A to point B doesn't mean it's true. I don't know the ins and outs of it, but don't some Aboriginal Australian tribes believe that time moves in some kind of spiral? And when you die you enter "dream time"? I find it hard to comprehend, because guess what? I was always led to believe that time was linear! Just illustrates [badly] a point.

Plus, when people say that if time travel was going to be invented in the future then people from the future would be here now-look at the John Titor thing. Sorry to go over old ground but if there was a genuine time traveller, no one would believe him/her anyway.

There's a school of thought that says there is no past or future, only the present [can't remember who said it-might have been Foucault]. Obviously, the future hasn't happened yet so that doesn't exist, and the past is represented by objects that exist in the present.

My head hurts.

Where do you propose these alternative universes come from? Where does the vast energy exist that would be required to run all of these universes simultaneously? What evidence is there to suggest that such places exist?

I'm afraid I still believe it's overcomplicating things...if anything, I think it's an excuse to explain why a plausible time traveller has never been recorded in history. "They might have appeared, but anything they did created a parallel universe".

Every transaction in the universe requires energy...so I'd like to know where the bright young physicist who came up with this idea thought the limitless energy that would be necessary to reorder time and create an entirely separate chain of events, yet somehow keeping the existing one intact, suddenly appeared from

actually i think it was more of an attempt to explain possible time travel with out the risk of paradox's.

But yes:P you do raise some valid points

Here is an interesting idea , I heard somewhere that if you look through a telescope at the earth from 100 lightyears away you will see the earth as it was in the 1970's ... I heard this in a museum so I am not sure if this is bogus or not .

Assuming its not bogus then perhaps one day we will be able to travel back in time , but not actually be able to interact with people or will they be able to see the time travelers . Much like a machine that allows you to astrally project through time since it has already happened ... or maybe at least a machine that allows you to look back into time and find out what exactly happened . Something like that would be really usefull ... too bad I have nothing except what I heard in a space museum ( A large one ) to support it .

i don't know about exact figures, but in theory xeno, yes you would be correct

Theoretically, you are correct...the reason you see it like that is the same reason the position of the sun we see in the sky is actually it's position 8 and a half minutes ago; because that's how long it takes light to travel that distance.

Assuming we could find a way to alter the rate at which light travelers, then it is possible we could view (though certainly not interact with) a moment backwards in time...however, I think it could only be achieved from the moment light was forced to begin moving at an altered speed. We can't very well effect light that has already completed its journey

Interesting concept though...

Side note: Time paradoxes are a stupid idea...any change that a time traveler has, or will ever make to the past has already occured a paradox is impossible, because if any change was made (say someone went back in time and succeeded in assassinating Hitler) then Hitler's face would not currently be in our history books.

It amazes me how people can't get their heads round that

ahhh , but then they wouldn't have to go back in time anymore because they already fixed it when the time comes to go back in time and destroy hitler , but then they would need to ... then they wouldnt... then they would .....

Its a logical loophole which leads me to believe that time travel that allows the travellers to actually affect history is a load of BS . The only way to explain it would be parrallel dimensions but then wouldn't the previous dimension be destroyed ? whoops , another logical loophole .

Another thing to think about would be actually succeding in traveling in time instead of just looking back at it as a record in an astrally projected state , in order to do that you would essentially have to unravel the threads of time ... what happens when you unravel a thread ? It breaks apart , what I am saying is that it could destroy the very essence of time and space itself and wouldn't be a good idea even if it was possible .

The reson going back in time isn't posible is becose if you ga back and say kill hitler then you will never be born meaning that you can't go back in time to kill him the moment you change the past you change the futher and thus your self and the time travel would have gone differntly as for time traveling to the future that is posible.

Time is bend as you aproche the speed of light going slower and slower until it stops (probebly at light speed) meaning that if you would have a shutle that could go the light speed that the reletive time would be slower for you as for the rest of the universe meaning that in 2 seconds of time you could have traveld 200 years for instans.
(time does exist how can you bent it if it doesn't exist??? )

As for the 100 light years away looking at earth that is the same as looking at a star. if you look at a star you see it as it was X years ago where X is the number of light yeas it is away becose that is howlong the light traveld to get here.

it is like a hot air baloon if you seen one flying and the turn on the flame you wil first see the flame and a second later you will hear the sound this is becose of the distance between you and the baloon. so you are hearing a sound from the past.

I'm not sure about the whole thing. Perhaps paradoxes are impossible for a different reason? To use the Hitler example, perhaps you could go back in time again and again to assassinate him, but every time you would fail. Perhaps the past is set and there's no changing it, but the future isn't. Like if you could go back and kill your grandfather so you wouldn't be born-maybe if you tried it something would happen every time so you could never actually do it.

Travelling to a different time period would scare seven shades of shite out of me.

I believe

a cool movie that has a little time travel in it is Donnie Darko. If you see one movie this year that is from 2001 then make is Donnie Darko.

I think we need to get a much better idea of what time actually is before we could even consider looking into traveling through it...

My gut feeling is that there is a fundamental aspect to time that we don't understand yet, stuff that theoretical physicists are just now considering. I think that some day there is going to be some kind of discovery that changes everything we know about what we call time.

On a related note, I was just reading an article in Scientific American dealing with Dark Matter and Dark Energy. The "Fudge Factor" calculations that have been causing everyone to come up with Dark Matter and dark Energy to explain anomalies could actually be because gravity doesn't work the same everywhere...

Talk about a fundamental ooopsie. The Voyager craft that we launched in the 70's to go out and take pictures of the outermost planets are now past the outer boundaries of Pluto and heading out into space. They are losing communication with the craft as they are too far away to be able to transmit back with the limited power of the craft, but they found something interesting.

It seems that the craft are not where they should be in space. Gravity dissipates at an inverse square of the distance of the gravitational center. In this case the gravitational center is the Sun(with variations for the mass of the planets). The gravity of the sun should be lessening the further away the craft is, but that isn't the case.

Several teams have been trying to figure out why the craft isn't where it is supposed to be, and right now they are considering maybe gravity isn't as constant as we once thought. We've never really been outside of our own little solar system to be able to directly observe gravity elsewhere and we had always assumed it to be the same everywhere...

The article goes on the explain that the "fudge factor" that scientists explain with Dark Matter and Dark Energy could actually be gravitational changes that we just don't understand quite yet.

Scientifically we have a long way to go. I look forward to seeing what changes occur over time. My money says that we are missing major fundamental chunks of knowledge about the universe around us...

I know making such a short post is shameful after the essays placed here by Sera and Fluffybunny but:

I agree with Sera

I believe time can be altered through the mind ... all it is is what we have been taught to believe is and isnt...We COULD alter time because I think all time coincides like slides in a movie... we can always go back and change the script...Ill meditate on this

Joe103 makes a good point, if you go back in time to kill anything then that would mean they would have never really existed.

I think its totally doable. At least to the future, not so sure about the past, though.

Well I myself am with the the whole 'light speed time-travel' theory...

Its a touchy subject but a few tests have been conducted with supersonic jets to try and prove that the closer u are to the speed of light, the more time slows down. Anyways, the jets were equipped with extremely precise digital stopwatches and apparently, after the jets landed and the watches were tested against those of the scientists who stayed on the ground, data showed that the watches DID in fact slow down when the jest were maxed out (Mind you it was sumthin miniscule like a hundred-thousandeth of a sec, seeing as they were no where NEAR the speed of light )...so that info brings us to my point:

If we look at Einsteins infamous formula 'E=mc2' <- Thats squared, by the way,
we see that energy is actually just mass traveling at the speed of light (squared).

Now, since time slows down as you approach light-speed, it theoretically stops completely at light-speed (at this point you're pure energy )
Here's the kicker, folks: Logically, because your'e stopped at light speed, anything faster than that would be moving backwards in time...see wut I'm saying?

So I'm with the notion that traveling into the future is impossible...but provided we could surpass the speed of light, we could go back in time! Great Scotts!!

Unfortunately E=mc^2 is not about energy that is actually mass traveling at the speed of light, but rather mass is actualy energy, and the proportionality constant between kg (mass) and joule (energy) happened to be c^2. One of the holy grail in engineering is the anti-matter engine which will directly convert mass to energy.

Now, sorry to disappoint you, but it is impossible to accelerate mass to the speed of light. As you put kinetic energy to any mass, its speed will increase. However this increase is not linear. Mathematicaly speaking, if you put infinite amount of energy to accelerate a mass, its speed will approach the speed of light. So to break the speed of light, you need to put more energy than infinity, which is... well.. impossible.

lol Hey thanks fer the major correction man. Idunno where I heard my version of the 'E=mc2' explaination *glares at physics teacher* but I'll be sure to stick to urs. As fer the 'infinite energy'....well....darn thats tuff...so much fer time-travel in a porsche!

i absolutely think that it is possible to time travel. Physics allows us to be able to do thid. i am sure we have to go thru some sort of vortex/ you should read the montauk project. remember-time is man made.

I wouldn't mind being a time traveler. And If I did I'd choose an old english police box and have sexier looking companions then dr who did. at least in bikinis.

Has anyone seen or read timeline?

Basically the way I see it is, if you were to go back in time to change something then you would never be able to do it, for the entire fact that you taveled through time because that event had already happened. Proving that nothing you did in that time actually changed anything. Because you were there things went exactly the way they were supposed to happen. I'm trying to make my point clear but I don't think I am doing a good job of it.

wanna see something funny on this topic? link

That is pretty funny.

Of course time travel exsits - there's no question about it. As the point has already been made, the easiest means of time travel is looking to the sky. Think about it though - it takes sun 8 mintues to send us it's wonderful light. It shows us that distance very much effects time. We only need to find a way to harness it, and learn how to turn the dials. Look at jet lag! Our bodies are not only worn the from trip itself but the traveling in time may leave us often tired or exhausted. And what about all the reports of people just walking down streets and then finding themself back in time. I do agree that not all accounts may be creditable but the idea has to flourish from some truth, of course it is to an extent.
And what about the speeds of sound and light! Surely these are not the only two senses we have as humans, so maybe there are speeds of all the senses! There has to be. Absolutely anything is possible. And if the gov't is in on all of this, it wouldn't surprise me. The american government is not involved with the people, it only looks out for the people who work there in those high places. Ans so they only share amongst themselves. And the way we are sculpted as a society - we can't handle these sort of things. Outcomes are always chaotic.

According to modern physics, traveling to the future is theoretically possible, in the sense that there is nothing saying we can't do it. We cannot, however travel to the past. The only way to time travel is by creating a local time distortion (let's say a phone booth). As this phone booth approaches the speed of light, it moves faster through time. It cannot, however, move backwards, because it would approach the time before it began moving backwards, a paradox that would cut off travel to the past before it begun. The only way to go to the past is to transcend the third dimension, ours, and go into the fourth dimension, in which Time is medium to move through like space is for us. This would allow us to go back in time in a parallel dimension, and possibly save others from Hitler, but not ourselves.
Time is not a concept, it is a dimension which we can only detect but not influence, in much the same way that 2-dimensional creatures can detect, but not influence the 3rd dimension.