How do you travel back in time?
409498
By traveling faster than the speed of light.  As velocity approaches the speed of light, time slows down.  Traveling faster than light speed then - would make you travel back in time.  Theoretically, it is possible (according to the theory of relativity) but scientifically, it doesn't seem possible.
281323
We live in a four-dimension universe, the fourth dimension being space-time. Time travel is THEORETICALLY possible. Just be careful if you go too far back in time and accidentally kill your father. Think about it!\n\nGod is spelled B-I-G B-A-N-G\nPBrax@netscape.com
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.
82860
Traveling into the future is possible.  Going back through time, however, is not.
767787
I wouldn't go back in time....I could mess things up!\n\n=)
62941
Take a battery operated clock - preferrably one with day and year - and attach it to the outside door of the refrigerator.  Insert leftovers.  At this point your frige is a time machine.  Attach to wrist if you wish. To go forward in time. step inside refrigerator...( leave door open) wait one hour. Eat leftovers while waiting. When you come out  you will have jumped one hour into the future.
1113547
I have done time travel. Evertime I come back to California from Japan. I leave around 16:00 in Japan and get home around 09:00 . Sounds like time travel to me.
374554
of course in the future, its the only time i havent been to yet.. anybody who who wants to go back to the past must have something in the present to regret about.
47511
You are travelling slowly forward through time right now.
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
483583
hi, well if i could change one thing i would want too go back in time so that i could fix all the stupid mitakes i have made in the past. i know that might sound crazy, but theres alot of mistakes i have made. catcha ps great question!
20783
It was great but if I could go back in time with all that I know now.. oh boy !!!!!!!!
1003820
Depends. You want to go forward or back. \nI *cough* actually have an entire theory about time travel. \nAnd that is, that there can only be one of you in existence at a time. Thus- if you go forward your putting yourself in your future self's body. And if you go back your putting yourself in your younger self body.\nBut- if I'm wrong and quantum physics 'same thing in countless positions at the same time' is right. Then you can be in two places at once. Therefore time travel- where you keep the machine and keep yourself how it is now, is possible. Then... I have no idea how you would go about it.\n\nIf anyone tells you to plug in the toaster and stick a fork in where the toast is supposed to come out though. Don't do it. Them electrical burns hurt.
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!!
198874
I don't know if I would choose to go back in time. \nTwo Main Reasons why:\n- I think if I went back in time and saw all the inventions we were lacking that I knew today's luxuries give us (internet, toilets, electric stoves, etc), I think I'd be depressed\n- Being a young woman, even going back 60 years, would probably not be a norm for a woman to go to college and the idea of her supporting herself and not being thrown into a marriage for society's sake\n\nBut, I think if it was only for a few days, the time I would most likely like to go back to is probably the New Testament time and see at least one scene that Jesus was in or that he experienced. Or really - any place in any part of the Bible I think would be awesome to experience from an audience perspective
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.
1059670
we travel in time as it is just only at the speed of our life and planet the thing to do is to step up or slow down the speed of the process then you are in a time machine