Can we create Time Machine?
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
238110
You would need a time portal machine
691265
Yes, did read about time travel when I was a kid.\n\nIf you are thinking of just being a passive observer, then a natural time machine is readily available to everyone. When we look at the stars, we are seeing the light of the past. The nearest star is 4.5 lightyears away, so we are looking at events that had happened during 2001. Other stars are even further away, so the light source carries information that are even older.\n\nThe images of the Earth, our Sun & the other planets in our Solar system are also being carried into space and this natural "moving historical records" are being beam into deep space. If there is a natural reflector somewhere out in space, we may be able to see such an image being reflected back to us in theory, so we could potentially see our own past.\n\nPhysically, traveling into the past or future would be a great many orders more difficult.
1061597
That is a scary thought, just one wrong person or even one wrong move and the world could be thrown into a parallel time or alternate universe, but would someone with a time machine be able to fix what went wrong. Then I think of what good even I could or what  I would want to go back and "fix" warn myself or loved ones of mistakes, prevent some deaths, but I know that this is not my place and I would not want to "play" God, Greed would probably play into it and I would want to play the lottery or something equally greedy. Great Question!!! Thanks for getting me to think about this.
533362
The first thing I, you or anyone else attempting this problem would have to do is come up with a concrete, working definition of Time.  No one knows precisely what it is, much as we talk about it and around it.  Not even Einstein, nor any of hi contemporaries.  We haven't really progressed on that score even now some 90 years later.  Looking at the work by Weinberg, Aharonov, Bondi, Witten, Schroedinger, Penrose, Hawking, or Minkowski.  All of whom are among the foremost of experts in the fields of Time, Relativity, Structure of the Universe.  If you can't define Time in such a fashion as you can then begin to see a means by which to manipulate time, you'll never get anywhere.  Then of course are the forces needed to accomplish that manipulation, what are they?  How do they operate?  How do we recognize them and harness them for use?\n     Nothing is so simple as the machine and concept envisioned by H.G. Wells in "The Time Machine".  The concept of time travel is an awesome thought, that it was as easy as the machine he described was just simplistic.\n     Bottom line, at this point in our history and on into our near future, it will not happen.  Sorry.
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.
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
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?
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
562933
Certainly!\n\nHuman memory really isn't all that great,in terms of data bytes. \n\nFor a discussion of this, see:\n\nwww.merkle.com/humanMemory.html \n\nThough clearly it varies widely from person to person, but estimates found in the literature place it between 100 to 1000 Gigabytes. Hard drives capable of that amount of storage are available now and aren't very expensive.\n\nIt's not the amount of memory that makes humans unique from machines, it's their ability to learn, reason and process data, usually called "intelligence".  \n\nNow, if you ask, can we create a machine with "intelligence" like humans? That's more difficult, but I believe that within the next ten or twenty years machines will come along that have a very low IQ. \n\nA scientist who first explored this possibility from a theoretical standpoint was an Englishman named Alan Turing. He conceived what became known as the "Turing Machine" and attempted to describe how it would work.  As a result, he helped create the first computers back in the 1930's and '40's. You might want to read some of his papers.\n\nGood question!
1006777
You'd have to build a time machine and go back a few billion years. Sadly organisms like amoeba are too small and soft to leave fossil records, the best we have to go on is evidence of the chemical reactions microbes perform.
502465
There is no such thing as time travel, it's a physical impossibility. The reason we haven't had any visitors from the future is because time travel simply cannot occur.
630252
Teleportation. We at least have theory on how teleportation could work. If the universe under discussion permits of time machines, then no time machines will be invented. The noted s/f author Larry Niven wrote a couple excellent essays on these topics, which I recommend to your attention. They will provide all the information you could possibly need.
48774
yes that is possible or else make a bat file to do so
1005791
Huh?  We solved time travel long ago.  Go somewhere real fast.  Come back and we'll all be dead.  You made it to the future.\n\nNow, by the nature of your question I assume you are looking for the physicist who is plotting to take over the universe with his new time machine.  Turn off the TV for a few minutes.  No 'branch' is trying to 'solve' time travel.  Unified theory be damned!  Someone throw me a string!
1065560
Anything is possible "if" another impossible thing is found to be possible; so long as the original thing is made possible by the formerly impossible thing.\n\nIn other words, of course time travel is possible so long as other impossible things become possible that would make it possible, such as your catalyst which would open a space and time rift.\n\nTherefore, the real question is not whether time travel is possible, but whether any catalyst does exist that would make it possible.\n\nThanks for the post!
609407
Well i don't think it is possible....but if it is created it will be great...but the cost will be very high...many unsolved mysteries would be solved...hope someone invents it.. ;)