time machine is possible? to travel to past and future life...?
540610
It's not possible because what was isn't anymore
847758
I really don't think it's possible to travel through time, though...
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.
964513
A time machine.\n\nI have always been fascinated with the concept of time travel, changing the past and seeing the future.  \n\nActually, I think most people are. \n\nMost have thought "What if" I could go back in time and rearrange a key event in their past or in history. \n\nThe future, of course, would just be fun to gaze on.  So many things have changed in the last 100 years, it's difficult to imagine where we might be in another 1000 years...if we don't destroy ourselves.\n\n...but even that would be fascinating to see:\n\n"The day the earth died".
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.
734390
Theoretically, time travel is possible. But current technology does not permit it. An interesting article appeared in Popular Science a while ago on time travel physics (see link). You're right about the stars - in that we're not looking at them in real time. In a similar vein, light from the earth reaches outward into space. An alien civilisation looking at us from far away through a telescope could theoretically view our past history. But light also weakens the further it gets away from its source, so to really look way back into our past, we'd need a really powerful instrument to detect such light patterns.
164691
According to Einstein, it's only possible to travel time to the future, although he never said that going back in time is impossible.\nTime slows down for you and your vechicle as you travel close to the speed of light (186,000 miles per second).  Anything outside is at normal time and speed obviously.\n\nTheoretically, if you travel 30 mins out into space at the speed of light and travel back to earth, you're only an hour old (by the way, at that speed, you've traveled an equivalent of six of our solor systems).  However, as you return to earth get ready to meet your great great grandson.\n***\nI don't know why.\nIf I did I'd own this freaking corporation.  *L*
68516
Maybe the more relevent answer is God does not allow us to time travel.  The Rules of This universe seem to suggest time Moves Forwards, and not backwards, though Stephen Hawking has noted that some subatomic Particles can briefly seem to move backwards in time, not at any significant factor that would allow time travel.  So maybe God ste up this "Law" so we cannot do what you wanted to do with the video tape, making the question seem Moot.  Or the other possibility..is say you could time travel, and you could video tape.  Human nature dictates, some people will believe, and some will be sceptical (see Doubting Thomas for reference)   We have video proof of the Moon Landing, Picture documentation of the Holocaust, and still some people believe neither event ever took place.
418249
no...the past cannot be revisited.It is scientifically impossible to redo realtime...time is not a program we can go back and fix.\nReligously,it is not even thought of....
558181
I haven't.But.......\n\nTime travel has been a popular science-fiction theme since H. G. Wells wrote his celebrated novel The Time Machine in 1895. But can it really be done? Is it possible to build a machine that would transport a human being into the past or future? \nFor decades, time travel lay beyond the fringe of respectable science. In recent years, however, the topic has become something of a cottage industry among theoretical physicists. The motivation has been partly recreational-time travel is fun to think about. But this research has a serious side, too. Understanding the relation between cause and effect is a key part of attempts to construct a unified theory of physics. If unrestricted time travel were possible, even in principle, the nature of such a unified theory could be drastically affected....
303837
Time travel is possible when we travel forward not backward. IF you look to the history books there are no such thing of human come form the future. So that is the proof that has defined the theory that we can't go to the past. There are theory that we can move forward by using the method of speed. Once you increase the speed of travelling the time will change very fast, and you might be in the future. But to have that kind of machine to bring you forward needs a lot of discovery especially about the strenght of metal, fuel, speed, and a lots more. You can get the theory about speed from einstein. Whatever you want to know about it, you can get it there, BUT eventhough you learn about time travel, you won't get that technology while you still alive. Maybe you can use that information just for you knowledge. Not more than that.
7276
If you go back into the past, you'll change the present.\nIf you go into the future, you'll change that also so the future won't be the same when you get there.\n\nI've always been opposed to time travel, though it is cool in movies. :)
531076
Traveling forward in time is called "Day Dreaming"\n\nTraveling backwards in time is called "Reminiscence"\n\nWhy, we have this magnificent faculty of imagination that allows us to conceive of things that have yet not come. Time travel is going to be hard, we cannot reach anywhere near the speed of light and Time for some reason, just move in one direction - forward. We have never seen a broken vase collect it's broken pieces together to form a completely whole on its own. We have never experienced Time moving backwards.\n\nParallel universe, yes, nice concept. Would you consider the angels, demons, and the spiritual realm as a parallel universe or alternate universe? If there is a parallel universe, there would be a point or a place where the two can meet and if we can find this portal, we could perhaps slip into another world. But it is all just conjectures and no solid evidence today.
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.
339701
Time travel occurs everyday with everyone.  Just sitting in front of the computer now I am advancing into the future at a rate of one second per second.  What the clock on the jet experiences is time dilation.  This simply means that for the clock on the Jet, time slowed down.  In this sense it is possible to travel into the future.  This would be done by travelling at extremely high speed.  This would essentially "fast forward" you into the future, but is a one way ticket as there is no way back.\n\nTime travel as a sci-fi concept (e.g Dr Who or Back to the Future) is not possible (as currently thought), as this would mean travelling into the past as well as the future.  There are some theories that could allow time travel into both the future and the past  However, in these theories, you could not travel futher back in time than the instant the time machine was built - the reasons for which are complicated and stop paradoxes from occuring!
559773
Firstly, don't overly concern yourself with the concept of fixing the past.  As a numerologist, Norman Shine, stated in one of his books: "Worrying about the future is just as escapist at living in the past."  In other words, if you spend all of your time worrying about the past, then you are wasting the present time and will have a very bleak future.\n\nIn regards to theories of changing the past, that's a theoretical astrophysics debate as well as a good philisophical debate question.  Either:\n\n1.) You can change the past and affect the direct future.\n2.) You can change the past, but the now new future is the future of another/parallel universe.\n3.) Somehow the laws of nature will prevent us from preventing the past/future (depending on your origin of time).\n4.) You change the past and cause a paradox and at that very moment the universe ceases to exist (according to Dr. E. Brown on Back To The Future)\n\nMy advice is to try and correct what is going on in the present to help your future.  You cannot change the past (that I know of), but you can change the future.  It may not be easy, but it is more possible than a quick-fix time machine-changing past patchwork.
59515
Time travel is actually 100% possible.  You're time travelling right now, the problem is that you cannot control how to time travel.  \n\nIf you had enough fuel on a spaceship that could go at 99% the speed of light, the time on the spaceship is slowed down dramatically, this is called time dilation, which means your biological clock also slows down, slowing your aging process.  If you come back to Earth by travelling 60000 light-years, you're only 40 years older then, but the Earth and everyone on it is 60000 years older.\n\nTime travelling to the past is currently not possible.