do you belive in time travel?
346914
Yes, especially forward at a rate of 1 sec = 1 sec.\n\nI also believe that other rates are possible depending on velocity and proximity to sources of gravity.\n\nI also would like to believe that it can be reversed, but that's harder to swallow due to paradox effects.
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.
258081
Time travel is pretty much a sure thing, at least to the past.  Tiny little wormholes pop up everywhere all the time.  If one were able to be captured, and then expanded to fit a person through (say with antigravity from the casimir effect or a lazer) a time machine could be made.  Now there are a couple of hoops to jump through of course.  Wormholes have TREMENDOUS pressure, they pretty much crush matter to a single point (called a singularity), so you would have to find a way to survive the trip.  Now, the wormhole has a beggining and an end, two sides like a tunnel.  Now, very large and very dense objects tend to slow down time, so does traveling very fast.  Drag one side of the wormhole next to something VERY dense, like say, a pulsar.  Leave it close to the pulsar and then it will experience time differently than the other side of the wormhole.  Leave it there until there is a time differential between the two that you are satisfied with (like say a year or whatever), and then drag it back right next to the other end of the tunnel.  Now you have two holes in space/time in reletively the same place, but if you walk through one side, you will come out right next to it, but in a different time, dictated by that time differential that you created.\n\nThere are of course paradoxed assciated with this.  One is the famous killing your mother paradox.  If you go back in time and kill your mother, you will not exist.  BUT, if you do not exist you could not have killed your mother and therefore you DO exist and you kill her etc etc etc.  How about a scientist which goes to the future a couple of years, opens up a scientific journal, takes quick notes of a new theory, and goes back to his time and gives the info to one of his students.  This studen then works a few years perfecting the theory and has it published.  This just so happens to be the journal that the scientist had read.  Where did the information come from in the first place, did it just appear out of nowhere?  There are lots of logical problems with this, but by the time we manage to develop the technology necessary to do all this we'll probably have figured it all out.
721881
I dont think time travel is possible! Even if you were to go faster than the speed of light, it still takes time to get to where you are going. And that brings up another question, where do you go?? Do you zoom around the planet a few million times? Which direction? Does it matter, it still takes TIME to do it.\n\nJust for argument sake, lets say you could go back (or forward) in time. I dont know why you couldnt be seen, you just traveled to a different time and when you get there your there, just as if you were to travel to a different city.
1082095
Time travel to the future is theoretically possible.  Travel in space at near-light speed for a short time and a much longer period of time will have passed on Earth.  Or you could have yourself cryogenicly frozen (though I'd wait until they perfect the revival process) and see the future that way.\n\nIt would be a good thing to see the progress of mankind, but you may have a hard time fitting in.  Since there's no way to travel backwards in time, you would be stuck there.
60294
yes, it's possible to travel into the future but not into the past. all you have to do is travel near the speed of light relative to earth and when you return after what feels like a few minutes, you'll find that many years have actually passed by.
1043962
No.  It is not possible to compress three dimensions of time into one.  It is also not possible to travel back in time, as that has already occurred.  However, according to Albert Einstein, the theory of relativity and the Einstein-Rosenbridge theory, it is possible to travel forward in time, relative to people on earth.  It is very complicated, but involves traveling beyond the speed of light (currently not possible) and near black holes (also not possible).  So theories exist on this subject but are unproven.
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.
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.
363789
yes - i can travel forward in time already
39733
umm...either i'd say that you must have copied the history channel, you are insane, or you perhaps found a way to go faster than the speed of light.\n\nsupposedly that would happen if you went that fast.  time slows the faster you go, and as you near the speed of light it virtually stands still, so if you go faster, then you start heading back in time.\n\ni doubt that you figured out a way though, so i'd go with you being insane if you truly believed that you could do visit ages past in person.
51613
One type of time travel occurs routinely here and now: our inexorable one-way drift into the future. Einstein's special theory of relativity revealed the possibility of accelerated travel into the future \nSuppose a person spends a year in a rocket that's traveling slightly less than the speed of light. Because motion at such enormous speeds drastically slows the clock for the traveler, that person could return to Earth to find that many years had elapsed at home. In that way, a traveler could leap into the future.
1144162
Actually, the current theory on time travel is that the furthest back into the past you can travel with a time machine is to the point that the time machine was created.\n\nAccording to this theory, to travel back into the past, you would need to create two worm holes.  One wormhole would exist at the time that you turn on the machine and the other worm hole would be put somewhere to 'age'.  At some time in the future, something could be put into the wormhole in the future and it would come out in the past.
39192
Time travel is to travel to any point in the past or future. Ideas of time travel have existed for centuries, but when Albert Einstein released his theory of special relativity, he laid the foundation for the theoretical possibility of time travel. As we all know, no one has successfully demonstrated time travel, but no one has been able to rule it out either. It turns out that, in some sense, we are all time travelers. As you sit at your desk, doing nothing more than clicking your mouse, time is traveling around you. The future is constantly being transformed into the past with the present only lasting for a fleeting moment. Everything that you are doing right now is quickly moving into the past, which means we continue to move through time. To learn about the concept of time and the different theories surrounding the viability of time travel, you can visit this site: http://www.howstuffworks.com/time-travel.htm
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.
211053
Of course.  We do it today.  When you fly from NY to LA, you go BACK in time.  When you fly to LA from NY you go FORWARD in time.  Time is man made.  It's how we measure our existence.  \nIf you want to experience something more than once, you will have to improve your deja vu skills.
56785
Yes, time travel is possible. :)\n\nIf you put a person in a rocket that can accelerate up to near light speeds on a round-about trip, when this guy comes back, he'd have aged much lesser than the guys who sent him. So he has travelled forwards in time.\n\nTravelling back in time is also possible. Oscilatting in time is possible. Time statis is also possible. All if we imagine a universe that has only a few elementary particles.\n\nHow? Well imagine a universe that has only a pendulum that swings back and forth. Now, we, as observers of this pendulum, can make the following observations, all different, and all "correct"\na. The pendulum is swinging back and forth as time advances\nb. The pendulum swings forth, then the direction of time reverses, and the pendulum goes back in time and swings back\nc. The pendulum is swinging forth and back as time retreats\n\nWhich of these is correct? We can't answer that question. So we can choose any one - it doesn't matter. These three are just different ways of looking at the phenomenon.\n\nYou may also want to read up about Feynman's diagrams