Can we actually realize time travelling?
82860
Traveling into the future is possible.  Going back through time, however, is not.
1163736
yes. everyone is a time traveller. in fact, even now you are travelling from a past to a future. the present is but a trasistory period of your journey.
267029
Yes, time is a relative and would be preceived differently if it could be perceived from all the various perspectives.  Time and space fold in upon each other and we see a result but not the only result.
676857
Assuming time travel is possible, I think such a senario might be possible.  The trouble people have with time paradox lies in the assumption that every thing in the universe shares the same time line.  Why should that be true?  Here's an example:\n\n\n------  X  -------------------  Y  ---------\n\nAbove is our theoretical timeline.  Y represents me, in the "present".  I use my time machine to go back to X, before my grandfather sires my father, and kill him.  Logic dictates that I shouldn't exist.  What I'm suggesting looks like this, instead:\n\n---------------------------  Y  ------------\n                             \n\n---------------------------  X  ------------\n\nX & Y still represent me & my grandfather, but each of us now possess our own separate time line.  Instead of "going back in time", I simply hop off my timeline & onto his.  I am now free to perform my assassination, without consequence to me (beyond the obvious legal ones), as I was not born on this timeline, but my own.  Whether or not I can now return to my own timeline is an entirely different question, however.
186287
Under Einstein's General and special theories of relativity, time travel is considered possible. Stephen Hawking has speculated that it must not have been discovered to be practical as we have not seen tourists coming from the future to visit us.
71991
cool question ! i dont believe in time travle , and thats a good point ! thanks
737000
Time travelling is a very difficult topic.\n\nYou can supposedly travel into the past if you travel faster than the speed of light but this involves getting a source of infinite energy as when matter gets closer and closer to the speed of light its mass will dramatically increase.\n\nThis is said to be very unlikely but general relativity says it may be possible on highly unusual circumstances.\n\nWormholes, permitted by general relativity,  could be possible only if it is traversable.\n\nIf you read general relativity and objects at speed of light you get time, space and gravity based dilations where light appears to be bent by gravity and arrives at an object at different times.\n\nYet again the object has to be travelling at 0.99c or faster!!\n\nI says time travel will never happens but i wish it would.
32484
ok i can tell you that i travel through time, and it is aquite remarkable thing, infact you travel through time too, at a very unremarkable rate of 1 second per second....pretty neat huh, your already a time traveler
68159
it is not that confusing. About three year ago on PBS there was a program that talked about time travel and one of the scientist stated that even if we could travel back in time we coul donly travel up to the point when the time machine was invented.\nBut do not forget there are manyh theories about time travel. For instance the grandfather paradox claims that you could not travel back in time, but others say you can but in a different dimension.
848166
I think there is a difference between *seeing* past events--like looking at the 8-minute-old light from the sun--and time travel.  Time travel, as it is portrayed in novels and movies, involves the ability to actually be in the past or future, and I cannot see how that is possible.\n\nTo begin with, imagine going back to your own childhood.  You enter the house where you grew up and have a conversation with the kid you used to be. There you are, in your old kitchen, having a conversation with . . . yourself.  Do you see the probem?  There are TWO of you, the young child that you were and the adult that you are now, both together.  If you cannot accept the possibility of another person, or a billion other people, all of whom are you--just as much you as the person reading this answer--then time travel can't exist.\n\nNow consider a further possibility.  You travel back in time to the kitchen where your great grandfather was a boy.  Maybe that was 100 or 120 years ago.  But this time, instead of having a conversation with the boy version of your great grandfather, you kill him.   He never becomes a father to your grandfather, so your grandfather is never born.  Obviously, neither is your father ever born, nor, of course, you.  But if you were never born, who is it who just killed your great grandfather?  And, while we are at it, how can you be here?\n\nBottom line:  Just as a recording of an old TV news show can tell us what happened last year, light traveling through space may provide us with a record of what went on 8 minutes or 8,000 years ago.  But it is not time travel, which is impossible.\n\nGood luck!!
810347
Buddy, your query holds weight in all of its concern, yet to monotonous these days to my knowledge. Since I have soothed such a query in past, I am withdrawn to another fabrication. Yet my previous answers weaved in a way can subside your curiosity as well. Consume a chunk of your time reading it. It may also answer your other questions: -\n\nThe concept holds itself in such an abstruse enigma, that centuries have failed to decipher its existence in a logical form. Scores of fiction writers have sculpted sci-fi books upon the behavior of time. We all have speculated over the so-called ‘Time Travel’ and have rummaged over the numerous possibilities that it may offer.\n\nFor the sweet sake of knowledge, once in a while, just sit down and think over the existence of time. When one questions ‘What is life?’ one is indirectly doubting his flow in time. Sometimes, time bears mercy upon you and hastens up, yet at other times, bestows upon you the curse of its viscous flow.\n\nYet, in reality what WE call time, is nothing but a theoretical fabrication that we, humans have crafted so as to better understand this “Fourth Dimension”. We assume we recognize time and its workings, yet mark my letters, we know absolutely N-O-T-H-I-N-G. We mortals imprint everything that we perceive in our brain, and then we analyze over it, yet never in its crude form. We find ourselves confined to the rigid boundaries of our senses. We bear to our knowledge the sphere of our vision and touch.\n\nThe notion bears itself in utmost simplicity. We can only conclude on matters we are able perceive in a correct mannerism. We do not bear such a sense organ nor are we able to implement over 4% of our brain, so as to perceive the concept of time in a proper ideology. Therefore we cannot chisel a concept concrete enough to bear the yoke of our questions.\n\nWe foolish mortals don’t even have the ability to measure time in its proper state. The state of time is always subjected to our memory, thoughts, personality, the circumstances, and innumerable other factors. You can’t even correspond two events in the same mannerism! Fragments from your memory are always erased, resulting to the unjustifiable way in which we perceive time.\n\nYet we can ALWAYS speculate! And we HAVE speculated! In such speculations, we have come to many ways to understand time. Scientists were entangled in similar doubts, yet they fashioned a theory that best satisfied the debatable world of ‘Philosophical Physics’. The theory states that time is completely relative to the individual who experiences it and furthermore a relationship exists between the three basic dimensions of space and time, leading to the birth of the space-time ideology. (I swear they stole the idea from me!)\n\nAnother speculation (Fasten your seatbelts for a Psycho Ride!). Suppose time is a fabric. (A complete supposition) A vast expanse of infinite non-molecular material. This fabric is existent yet not perceivable by our limited senses. If we are to possess a way to make a ‘cut’ in this fabric, we CAN gain access to two different periods in time. But then again, that is theoretical, and humanly impossible. \n\nSo far we have considered time to be a concept in whose relation we all exist. But in technical truth, time is relative to every individual! What we consider time is the manufacture of us mortals. What if time exists independently for everyone? When one perishes, he actually repeats his so called 'life'. Perhaps the period from the Big Bang to the collapse of the universe has repeated itself millions of times already! There is no telling, for there is no concrete platform, to which we can relate existence. We just have to relate everything to everything else!\n\nNow those are speculations. No one can state them correct or incorrect, for one does not bear a perception that great. Perhaps we are just the play-stuff of a superior colossal existence. Then again, what is existence?
70282
No.  You'd need to have a wormhole.  Current theory predicts that transversable wormholes exist but would not allow time travel.  See reference for details.
989998
Theoretically possible. See: http://www.pbs.org/wgbh/nova/time/through.html
823216
Yes!\n\nWell, in theory, at least.\n\nThe "Time Machine" would require the existence of a worm hole - something that scientists believe may exist in theory. Sadly, of course, we haven't actually found one yet, so this is all pie-in-the-sky, but if we *did* find a worm hole, then it's dead easy! (Sort of.)\n\nHere's how we do it.....\n\nFirst, find your worm hole.\n\nSecond, drag one end of the worm hole across space until it is next to the other end.\n\nThird, drag the end of the worm hole round and round the other end, at a speed as close to the speed of light as you can.\n\nNow, as we all know (don't we?) time travels more slowly for a moving clock. (Actually, this has been proved to be true, but that's something for another question - ask and I'll tell you how they proved it.) So, since time is travelling more slowly for the end of the worm hole that you're dragging around it will slip into the past relative to the end that isn't moving.\n\nLastly, simply jump in the end that you've been dragging around and you'll appear out the other end in the future. Then do it again and appear even further in the future. Repeat until you are as far into the future as you want to be.\n\nOnce you've got bored with the future (as if!) just go around the other way and you'll go back in time until you arrive back at the time you started.\n\nYou can't use it to go back into the past though, because you'll simply return to a time before you made your time machine i.e. before you dragged the other end across space.\n\nSee? It's easy! LOL
186420
Time travel seems to make sense to us because we have the concepts of past and future.  In particular, we can vividly picture in our minds the parts of the past we have experienced.  The past can seem to have a kind of reality because of memory, as the can future because of imagination.  But, neither the past nor the future have any real existence.  There is only the present.\n\nTime is not a container like space is.  We can travel in space because other places really exist.  Time is not a container.  There's nowhere to go.  So, no, time travel is not possible.
294584
Time travel at least in the sense of viewing the past events is possible. This can be done with meditation, remote viewing,scrying, Dream work, past life regression, psychic vision or hypnosis. Most people can learn. I have done it and know many others who have also done it. It is also possible to veiw created realities too. Yes psychic veiwing often reveals  things very different from the accepted view. \nFor example,remote viewing of the Crucifition shows around 40 crucifixions on the site at that time rather than three.\nThis is probably historically correct . \n Rather than being confusing this is usualy liberating and has a quality of rightness that was missing from the conventional version. Biblical  historical events are often quite different from taught versions. Some of these psychic perceptions have been confirmed by archeologists and historians.
137522
NOVA: Do you think that backwards time travel will ever be possible?\n\n\nSagan: Such questions are purely a matter of evidence, and if the evidence is inconsistent or insufficient, then we withhold judgment until there is better evidence. Right now we're in one of those classic, wonderfully evocative moments in science when we don't know, when there are those on both sides of the debate, and when what is at stake is very mystifying and very profound. \n\nIf we could travel into the past, it's mind-boggling what would be possible. For one thing, history would become an experimental science, which it certainly isn't today. The possible insights into our own past and nature and origins would be dazzling. For another, we would be facing the deep paradoxes of interfering with the scheme of causality that has led to our own time and ourselves. I have no idea whether it's possible, but it's certainly worth exploring.\n\nNOVA: Would you like it to be possible?\n\n \nSagan: I have mixed feelings. The explorer and experimentalist in me would very much like it to be possible. But the idea that going into the past could wipe me out so that I would have never lived is somewhat disquieting.