Will time travel ever be invented?

Question

Will time travel ever be invented? (Or has it already been invented?)

so_classy..that's my theory...even if the "aliens" are little green men (haha) this could be accounted for by...evoluition. Human evolution. The human's evolution to deal with environmental conditions in the future.

Answer 1

It has in a way. According to Einsteins theory of relativity, the faster you travel, the more time slows down. The astronauts that traveled to the moon came back a few seconds younger than us. To have real time travel to the future you would have to travel very close to the speed of light. Now going back to the past is much more complicated. There are some theories on this but it involves things like blackholes and the like......

Study physics and you will learn lots of things about how our universe works.

Answer 2

Actually, it cannot, and for obscure reasons that relate not to Einstein but to other scientists.

There is a set of postulates that is well studied and always gives accurate results, which are called the laws of thermodynamics. These have been studied for the past 150 years, and they seem to be correct.

They also prevent time travel.

One of the laws is that the amount of energy in a closed system is always constant. If you consider that the Universe at any moment a closed system (which it is), then travel through time would introduce more energy into the system, which would violate this law.

Additionally, introduction of mass would also violate this, since Einstein showed that mass can be considered another form of potential energy.

To bring something back in time to our present, an identical mass with an identical amount of energy (including all quantum states of all the atoms) would have to be transported into the future at the same exact moment.

There is another law of thermodynamics that bears on this: the fact that hot things cool down and cold things heat up. If time were symmetric and reversible (which it would be in order to have time travel possible), when you set down a cup of coffee it would be equally likely to heat up and boil away as it would be to cool down. We have never seen this happen, and it is not considered to be likely that it is possible.

Answer 3

A few year back there way a man on the net by the name of John Titor also know as time-traveler 1. he claimed to have come from the not to distant future, 2036 if i remember correctly. he said that research had allowed scientist to harness a micro singularity(tiny black hole) this allowed a gravity displacement and thus time travel. It was a large heavy device that was(will be)made by GE. he was part of as military unit and had been sent back to the 1970s to retrieve an old style computer(an IBM 5100 if my memory serves me correctly) to use to translate UNIX language to something else. This was after a nuclear war that was started by Russia attacking the U.S. of A. and China. Very interesting story. According to John Titor there are more that one version of use occurring in multiply perhaps millions of parallel universes and each one being different from the other.

Answer 4

Traveling in time would be a reach for scientist to invent/discover. Worm holes in astrology are our only hope. Here is Wikipedia's info on it: A wormhole could allow time travel. This could be accomplished by accelerating one end of the wormhole to a high velocity relative to the other, and then sometime later bringing it back; relativistic time dilation would result in the accelerated wormhole mouth aging less than the stationary one as seen by an external observer, similar to what is seen in the twin paradox. However, time connects differently through the wormhole than outside it, so that synchronized clocks at each mouth will remain synchronized to someone traveling through the wormhole itself, no matter how the mouths move around. This means that anything which entered the accelerated wormhole mouth would exit the stationary one at a point in time prior to its entry. For example, if clocks at both mouths both showed the date as 2000 before one mouth was accelerated, and after being taken on a trip at relativistic velocities the accelerated mouth was brought back to the same region as the stationary mouth with the accelerated mouth's clock reading 2005 while the stationary mouth's clock read 2010, then a traveler who entered the accelerated mouth at this moment would exit the stationary mouth when its clock also read 2005, in the same region but now five years in the past. Such a configuration of wormholes would allow for a particle's world line to form a closed loop in spacetime, known as a closed timelike curve.

It is thought that it may not be possible to convert a wormhole into a time machine in this manner: some analyses using the semiclassical approach to incorporating quantum effects into general relativity indicate that a feedback loop of virtual particles would circulate through the wormhole with ever-increasing intensity, destroying it before any information could be passed through it, in keeping with the chronology protection conjecture. This has been called into question by the suggestion that radiation would disperse after traveling through the wormhole, therefore preventing infinite accumulation. The debate on this matter is described by Kip S. Thorne in the book Black Holes and Time Warps. There is also the Roman ring, which is a configuration of more than one wormhole. This ring seems to allow a closed time loop with stable wormholes when analyzed using semiclassical gravity, although without a full theory of quantum gravity it is uncertain whether the semiclassical approach is reliable in this case.

Answer 5

For time travel to be possible, logic demands that all past and future time exist in parallel so as to be accessed randomly by the time machine. It would mean that all actions by everybody now alive, in the past, as well as all future beings--animals and insects included-would already be written on the universe's hard-drive.

Such logic to me sounds like the utmost nonsense. It would mean that no being could attempt spontaneous actions. That's doesn't seem to coincide with scientific discovery presently known.

Rather, the past seems set in 'cement' and 'now' seems to be progressing with random occurrences as well as planned ones while the future is a work in progress.

So while SF books on this subject are entertaining they seem to go against my common sense. If someone can refute my logic with a serious argument, I would like to read such an argument.

Answer 6

Technically we are all timetravellers, progressing into the depths of the 4th dimension- time. While theoretically it is possible to time travel, there are many conflicting ideas that go from there.

Some scientists propose that time travel into the past is not possible by a single traveller (opposed to reverting the entire universe to a past time) because changing the fabric of time-space in any way (stepping on a piece of grass or by simply existing in that time) would destroy time itself. The simple travel itself would destroy the timeline created by doing so and therefore extinguish the traveller, and some assume that with the traveller so would go the 4th dimension with him.

Other theories propose that time travel is possible by manipulating large sums of energy (power harnessed by a black hole or supernova) or by distorting time-space in a way that would revert the time-space affected to a past time the way time-space bends when observed near a large mass. (when seeing a star in the sky, the visable position is actually warped by the presence of our sun slightly)

Answer 7

Larry Niven has pointed out that if one could change the past via time travel, somebody would surely use a time machine to change the past so that time travel wasn't invented.

Answer 8

undemanding answer: It defies the guidelines of physics. the tip. not extra communication needed. Time strikes in a linear course. that's the reason we remember the previous yet no longer the destiny. you could alter your adventure of the passage of time as a manner to "trip to the destiny". yet you haven't any longer "popped" out the present and "popped" into the destiny, purely replaced the way you adventure the passage of time. as quickly as a 2d in time has surpassed inspite of the shown fact that, it is going to no longer be able to be recalled. the only way for contemporary-to-previous trip to happen may well be sending archives (or messages) lower back in time (no longer people), or maybe then we are assuming the fee of sunshine may well be broken (no longer circumvented consisting of bending area). in view that no longer something can smash that speed decrease, our messages regrettably will stay interior the present and destiny basically.

Answer 9

It's already been invented

Most of the so-called UFOs are in fact time machines, traveling different ages

Answer 10

Yes and put Bush on board with a one way ticket.