Can Superman travel back in time using wormholes?
150909
Since Superman is, alas, a fictional character, and since this mode of transportation has been postulated in science fiction, I see no reason why he cannot do it.  However, this remains an open question as to whether mere humans can ever do that at some point in the "future."\n\nIf so, then our past and present may be peppered with people from the future.  Remember "Chariots of the Gods?"  In fact, much of what we call miracles or magic may be the works of people from our future.  Remember "A Connecticut Yankee in King Arthur's Court?"
114656
It's not necessarily impossible according to theory, but given our current technology, it's out of the question.  There's a lot of trouble with time travel theory, including multiple paradoxes.\n\nThe most famous paradox is, of course, the grandfather paradox.  It goes something like this: One day, after you've built your time machine, you decide to travel back into the past to shoot your grandfather before your father is born.  Here is the major paradox, if you suceed in killing your grandfather, you couldn't be born to go back and shoot him.  Just as well, the conditions required for you to shoot him couldn't exist and thus he lives.\n\nStill on the 'travel back in time to shoot grandpa' string, several other things could happen as well.  You could be transported to an alternate timeline, similar to ours, but not ours, and whatever you do there doesn't affect anything in our time line.  You could go back and try and kill your grandfather, but you are thwarted in every attempt, which tends to imply some sort of destiny or grand scheme.  You could try to go back in time but are ripped to shreds because every fragment of your being wants to be in its natural time.  There's a million and one other things that could happen.\n\nThat, I believe, is not necessarily answering your question, though.  Time itself is not understood by physicists even now.  What it is, no one is quite sure!  (However, I'm fairly certain time is related somehow to mass.)  One thing that's always for certain is time moves forward in a very linear fashion, cause followed by effect otherwise called casaulity.  I can't say one way or another why exactly we can't go back in time and I won't say it's not possible, some theories say it is.\n\nHowever, I believe Stephen Hawking offered up the best proof against time travel to date: Wouldn't there be time tourists from the future visiting us if time travel was feasible?
467849
I think that there is the theory that you could travel back in time, but it is really all Star Treckie.  I don't think there is any possibility of travelling back in time, no matter how fast you can go.
786311
You can travel to the past but you can not travel to the future BECAUSE it did not occur yet.\nCheck the latest Physics web sites on this topic of time travel
403108
I watched a Discovery Channel Feature bout time and space,\nand one guy said that the present laws of Physics do not\nprohibit time travel... so it is a possibility.\n\nThe concept is so real that I think people from the future are walking amongst us today. They are more stronger, tougher, faster, and smarter. From the future, they are sent to our time to rule everybody else. I know one. His name is Ben Wallace.
95316
I believe yes.. It makes sense, You see all of these dimensions are just directions. If you say that the four dimensions are represented by X,Y,Z,T these are merely directions of dimensions then all of those are travellable (meaning you can travel in those directions). You can go to left & Right (X), You can go Forward & Backward (Y), you can go Up or Down (Z). The questions now is how do you travel through time. According to Albert Einstein if there is anything that can go faster than the speed of light then it will be possible to travel through time. It is actually true becuase our mind can go faster that speed of light that whay our mind can travel through time, sometimes we remember things in our past that the way our mind travels.
938858
YES! Time travel is possible. For example, an object traveling at high speeds ages more slowly than a stationary object. This means that if you were to travel into outer space and return, moving close to light speed, you could travel thousands of years into the Earth's future.\n\nNewton's most important contribution to science was his mathematical definition of how motion changes with time. He showed that the force causing apples to fall is the same force that drives planetary motions and produces tides. However, Newton was puzzled by the fact that gravity seemed to operate instantaneously at a distance. He admitted he could only describe it without understanding how it worked. Not until Einstein's general theory of relativity was gravity changed from a "force" to the movement of matter along the shortest space in a curved spacetime. The Sun bends spacetime, and spacetime tells planets how to move. For Newton, both space and time were absolute. Space was a fixed, infinite, unmoving metric against which absolute motions could be measured. Newton also believed the universe was pervaded by a single absolute time that could be symbolized by an imaginary clock off somewhere in space. Einstein changed all this with his relativity theories, and once wrote, "Newton, forgive me."\n\nEinstein's first major contribution to the study of time occurred when he revolutionized physics with his "special theory of relativity" by showing how time changes with motion. Today, scientists do not see problems of time or motion as "absolute" with a single correct answer. Because time is relative to the speed one is traveling at, there can never be a clock at the center of the universe to which everyone can set their watches. Your entire life is the blink of an eye to an alien traveling close to the speed of light. Today, Newtonian mechanics have become a special case within Einstein's theory of relativity. Einstein's relativity will eventually become a subset of a new science more comprehensive in its description of the fabric of our universe. (The word "relativity" derives from the fact that the appearance of the world depends on our state of motion; it is "relative.")\n\nWe are a moment in astronomic time, a transient guest of the Earth. Our wet, wrinkled brains do not allow us to comprehend many mysteries of time and space. Our brains evolved to make us run from saber-toothed cats on the American savanna, to hunt deer, and to efficiently scavenge from the kills of large carnivores. Despite our mental limitations, we have come remarkably far. We have managed to pull back the cosmic curtains a crack to let in the light. Questions raised by physicists, from Newton to Kurt Gödel to Einstein to Stephen Hawking, are among the most profound we can ask.\n\nIs time real? Does it flow in one direction only? Does it have a beginning or an end? What is eternity? None of these questions can be answered to scientists' satisfaction. Yet the mere asking of these questions stretches our minds, and the continual search for answers provides useful insights along the way.
84170
the answer is - it depends - on a lot of things\n\nI hate to answer a question with a question but here goes ...\n\n- do you mean in theory or in practice ??? (in [einstein's relativity] theory it is possible to travel into the future - all you need to do is to go out into space for a while - the time here on earth will continue to progress at a normal pace while time for you will progress more slowly - when you come back you'll have essentially traveled into the future - not quite a time 'machine' but same effect
290592
*Edit*\nSorry for editing again!\nTo answer your questions. Yes the past still exists! But objects in the past have a fixed (p,q,r,s,u,v,w,x,y,z,t) location (where each letter represents another dimension in space, t = time). To realise this, think about where you were last Friday at exactly 4:00pm. You're position at that time will never change again. Wherever you were, that's where you'll always have been last Friday at 4:00pm. The rest of this post explains why you cannot go back to that time without dramatic changes in your string physiology, but that time travel may be possible for some types of matter (possibly supersymmetric matter?). Unless matter has moved backward along the time dimension, it cannot move forward, because the time dimension is expanding along with the rest of the universe.\n\nI had this discussion on a drive up to play hockey in Edmonton the other day. Here's my idea but I don't know if it is true:\n\nYes, time travel is possible. Time is just like the three other open dimensions we are used to - you can travel back and forth along the 3 space dimensions and it is possible that things (notice I don't say people, keep reading to find out why) can move back along time. But as far as I know, the four dimensions of space and time do not have radii like the 5-11 compactified dimensions of M-Theory do. Therefore something travelling in time cannot loop back to the same place in time that it was before. Thus you could not go back in time and have yourself arrive at the same place in spacetime that you are today. The dimension is linear.\n\nThe MOST important part of this is the idea of symmetry breaking. In my mind, symmetry breaking accounts for why something traveling back along the time dimension will not encounter the same events that originally occurred when it started it's motion along time. Symmetry breaking is a time dependent event. The easiest way to explain it is to reference the poem "The Road Not Taken" by Robert Frost. Events in time diverge at critical points (usually at critical values for state variables like temperature). Travelling back in time would cause disorder of various aspects of energy and matter in the universe, and different bifurcation paths, or "decisions", might occur, effectively changing the future in ways imperceptible to things that are made up of baryonic matter, which leads me to my final point.\n\nThe only objects that could time travel are those made up of closed, unattached strings. The strings of ordinary matter, like that which we are made up with, are open ended and attached to dimensions. This is why the mass that makes up us and objects like the sun distort spacetime. Time actually travels slower as you approach mass, and this is what causes masses to move toward each other. Time gets warped and masses fall towards spacetime that is in a lower transient state. What makes us up is effectively 'attached' to time, so unless we could change ourselves to be made up of matter of closed loop strings, we cannot attach ourselves from time. This also means we cannot leave our universe either, but that's another story.
1068787
travel into the future is possible by einstein theory as one approaches the speed of light.  \n\nTraveling into the past is a different story though, access would have to be open from the past for this.  There is no way to create a portal to the past, someone from the past would have to create the portal to the future where the future person could pass.  \n\nIt is argued though that this would only open a door to another dimension and another universe independent of our own universe.  If you think about it, the fact that someone could 'travel' to the past is direct evidence that other parallel universes exist.  If you were to travel back into time history and events would inevitably be changed from occurences known to us in the present, therefore you must be in another universe.  \n\nAnother way to see the past is to create a large gravitational force bending space time such as a blackhole, and align it so that the light traveling from where you are would be bent back to a location where you could observe it.  This would be like viewing T.V. though, because you could have no interaction.
148250
We *are* traveling through time as we speak. We travel through time at a little less than the speed of light.\n\nFor every meter per second we move, we move a meter per second slower through time. Thus if we were to get in a spaceship and travel at half the speed of light through space for an extended period, then we would be moving through time at approximately half the speed at which everyone on Earth would be.\n\nWhen we returned to Earth and left our spaceship, we would discover that everyone else had aged twice as much as we did. So it is possible for us to travel into the future at a rate faster than one second per second, but it requires an extraordinary amount of resources. Consider that given Einstein's calculations to be true, the largest time displacement humanity has yet reached would be somewhere at about a second (set by whoever's been in space the longest, because in orbit you're traveling at 17,500 mph).\n\nTraveling to the past is impossible now, although we maybe be able to temporally distort a wormhole, allowing travel back to the time that the wormhole was first distorted; however this is yet to be proven or tested. We currently have no way of "grabbing" a black hole and moving it through space.\n\nI hope this helps.
1093002
the theories of time travel are extremely complex. it is often mistaken that one can use radiation or electro-magnetics to warp space into  an alternate reality. one of the popular theories of time travel is only from a certain point. what I'm saying is that we will not be able to visit this time from the future. \n\na few theories are;\n\n1: warping the very fabric of space, then accelerating to near the speed of light through the folds. the speed would then turn you body into pure energy, eventually reformulating somewhere in the future. Problems: 1; to warp space fabric would require more energy than it takes to make a black hole. 2; this is my personal theory.\n\n2: do you know how a worm-hole works? if not, ignore this section. but take an opening of a worm-hole and some how place by a point of high gravity (a neutron star). while at the same time directing negative energy at both openings in order to keep them from collapsing into a black hole. time slows down in super-high gravity, therefore if you throw yourself into the opening with no gravity, you'll wind up in the past. and vise-versa. Problems; 1; worm-hole technology is beyond our reach at this time. 2; worm-holes are flickering in and out of existence every infinitely small spec of time, therefore it is difficult to isolate one.\n\nas for what time travel exactly is, i could go one for about three pages.\n\nI'm a nerd. \n\nStargazer.
751148
Wormholes were thought to exist via black holes, like the movie The Black Hole.  That idea was taken back this year so now black holes are just thought to be strong gravitational objects with no special properties.\n\nTime travel was never possible.  The closest thing to seeing the past is by looking at like that was projected by objects.  The light from our sun is around 9 minutes old.
459750
The concept of a time machine could exist, but it would take an almost infinite amount of energy.  The only way it could work is exactly the way you are asking,  You can only move forward in time, just at different rates.  So if you want to see the future then time would need to slow down for you and the world would have to speed up.  After a while you could return to earth and it would be the future.  \nFrom what is presently known about physics you can only move forward in time only at different rates from an observers point of view.  Believe me if we could travel back in time someone would have already screwed it up something big by now.\n\nThis is a one way trip, good luck
138234
Yes. Wormholes subconciously send a ray of time 100 Million years  later into our universe. Witch means we wouldn't notice that it use to be the dinosaurs time and a quasar or worhole zapped us here now! You can never enter a wormhole once you enter it its portal to time closes and anybody who goes in it is trapped in eternal nothingness.
204509
Yes, through wormhole and warp drive. A wormhole should be able to connect distant locations in the universe by bending spacetime, allowing travel between them that is faster than it would take light to make the journey through normal space. \n\nA warp drive would be a mechanism for warping space-time in such a way that an object could move faster than light.\n\nIf you would like to learn more about wormhole, follow this link http://en.wikipedia.org/wiki/Wormhole
394861
I have no idea. But Steven Hawking says we cant travel back in time, and Einstein showed that hitting the speed of light with a mass is pretty unlikely. But that has no effect on the massless.\n\nAnd E=MC2 is just the rest energy of a particle of mass M and has no time travel implications.\n\nI know Cal-tech has some research in this field... look into it.