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LONDON, England (CNN) -- Bruce Willis did it, with the aid of a large plastic tube and a set of bellows, in "Twelve Monkeys;" Michael J. Fox did it -- three times -- in the "Back to the Future" series; the crew of the Starship Enterprise can't stop doing it (at least 14 times in television episodes alone); while as the "Terminator" Arnold Schwarzenegger also gave it a go, albeit stark naked.

Time travel, and all the various paradoxes and temporal anomalies associated with it, have long been a staple of the world of fiction.(Full story)

Will time travel ever be anything more than a theoretical possibility?

I think it will. A few hundred years ago people thought flying or being in different places but hearing and seeing each other were impossible. But all these things are ordinary today. Everything is possible. I'm sure.
Shushan, Yerevan

Personally I think we will never master time travel... And I think even if we could we never should in the first place, because altering a small thing in the past might create a huge problem in the present or future. Or changing something major like for example, somehow stopping the holocaust from ever happening, would probably lead to huge changes in our present time... Even though the holocaust was horrible we did learn some vauluable lessons from it, and had it never happened we would have never learnt those lessons in the first place.
Moussa, New Bedford, MA, USA

If somewhere in our very distant future we learn how to travel back in time, wouldn't we be visited by our future scientists right now?
Mark McGlynn, Barrie, Ontario

Yes. Perhaps by this time this dream of time travel will be realized. We will now have the chance of traveling through history and we will better understand it if we were really there at that time frame. We can also get a sneak preview of life in the future as well.
Lansang, Manila, Philippines

Personally I think time traveling is possible but we still don't have the facilities, resources and the level of advanced technological equipment that is needed for attempting to travel through time. Maybe we will in another century or two when scientists have gathered enough data about our universe. But there should be limits in time traveling and only up to a certain point in the past. It might be better not going there to avoid consequences that could alter the universe in ways inconceivable.
Mel Maniwan, Bohol, Philippines

Time travel is a physical impossibility. We are not traveling along a path in which we can hop back or forward, but rather everything is happening now at this moment. This moment is the only moment and we will therefore never be able to travel to a previous or future moment.
Chris Jones, Sydney, Australia

In 50 years will be possible to travel in time.
David Attila Tamas, Hungary

It will always be a theory and fantasy. Ever watched the movie "Final Destination?" That is what is bound to happen. There will be an imbalance in way things are supposed to be because we went to the past and changed something. It is human nature and we are bound to do that.
Stephen Mwambago, Naukuru, Kenya

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