Will time travel ever be posible?
143977
I would love to see time travel available, but I believe to go back and prevent a part of history would be wrong. It would change the future for everyone. I loved the TV show "Quantum Leap", but I always thought there was something wrong about changing history.
965397
Travelling back in time is not allowed by einstein's theory of relativity...however if you can instantly teleport youself to some faraway star,say a 101 light years away, you might be able to catch einstein receiving his nobel prize!! as stated earlier, there is no master grandfather clock that is regularly ticking away the seconds..rather that rate is adjustable...but one may zip into the future..consider an example where you are on a space-ship at a speed of 0.99990 c that is going away from the earth and coming back..in your time frame say,it takes about twenty years..using lorentz transformations, the time for your to and fro motion is close to 450 years!!
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
560990
Time travel is impossible. Find someone who taped it. Put up a card at the grocery store and leave a number. Maybe you'll meet a nice guy and GET A LIFE!!
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.
391887
yes you can. it takes you back in time...or you get to see the future..this is how time machines work.
857528
I have not seen or met a time traveller. However their is such a thing as a gauche horizon. Basicaly when you create a time machine you cannot travel back before the time machine was created. So sence as far as I know, no time machine has been invented as of yet. It would be impossible for a time traveller from the future to experience what life is like in our historical period. For instance if the time machine was created in 2500 they may start having time travellers from the future coming back for anthropological surverys. However they could not visit 2006 because the time machine was not yet invented.
513714
time is not linear and people can shape shift, remote veiw, and time travel. For the answer to your question, simply sit and meditate upon it, it will become clear....you already know.
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
1139606
Im afraid I do not think time travel is possible.  Einstein’s theory says that as you move faster time slows down.  The problem lies in getting to a speed that is so fast that time actually moves backwards.  Anything with mass cannot reach the speed of light, because as its speed increases the amount for energy required to push it increases, so it would take an infinite amount of energy for something with mass to reach the speed of light.  Photons have a zero-mass and therefore light can travel at... well the speed of light :)\n\nSo if it was possible to break ourselves down into zero-mass pieces then it would be possible to travel the speed of light.  What is unknown is if you could travel so fast that you could actually "turn back time" which I do not believe is possible.  Or else we would see people from the future already coming back to the past.\n\nAnd then you would get those crazy little problems of ... if you went back in time and killed yourself at say 12 years old.   How would you have ever been old enough to actually travel back in time to kill yourself... because you would have been dead...\n\nIt could be possible to slow time down in relationship to yourself, so that the earth ages faster... If you consider that time travel.  Say for example you get into your space ship, and travel near the speed of light, then the earth would age faster relative to you.  If you consider that time travel then yes I believe that is possible.  But the thought of going forward, and back in time is not possible in my humble opinion.
813626
Sadly, I've actually heard about this before.  I can't believe how much useless junk I put into my head...I'd say pure fiction.  Its just more likely that he was some bored computer geek trying to get some attention.  Its still unclear whether or not time travel into the past is possible.  Based on current science I'm leaning toward the impossible side.  Oh well, 2036 will be here soon enough.  Then we'll know for sure.   ;)
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?
328529
Oooooh what a cool question... more philosophical than scientific in my opinion.\n\nI think you're right in theory.  If there is only one time line then stopping humans (and everything) from evolving (which would take quite the disaster) would mean that our time traveler (assuming he's human) would have never existed and he could never have stopped evolution... it's an infinate loop really, or impossible.  A lot of people say that if time travel is possible, it's only possible in forward time.  Although there are ideas about multiple universes and looping time, and parallel timelines that can explain things like this and Donnie Darko. Haha, fun question.\n\n\n\n\nVeck.  First of all it's more a question about time travel than evolution.\n\nSecond evolution definately has NOT been abandonded by the scientific community.  It is still our best answer and there is too much indirect evidence to throw such a good theory away.  But you are right... it is "just" a theory, just like gravity... better not rely on it ;)
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.
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.
680669
we r travelling at 1 second forward per second.\n\nIf that's not that u meant, the easiest and most likely way to get a time machine to time travel is for yourself in the future to travel back now to give yourself the time machine now which u got in the "past" from the "future yourself" coming back to gave it to u.
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.