Time Travel is *Technically?* Impossible>>>

[Thermonuclear Kitten 70]

Well, Time Travel would be used for the purpose for changing something in the past, (don't talk about future) yet if you did what you needed to do in the past, you would never have needed to go and use Time Travel to go back originally, therefore you would not actually have gone back in time in the first place. BUTTTT, if you went back into time and left a note, that may be enough cause to go back in time and have it work. 

 

Notice: Please talk about the past being changed, not really the future unless it is really important to your post.

Edited January 27, 2016 by Shadow Elecktra

[碇 シンジン 27,442]

if you go faster than light will you be able to see the past as the present light is too slow to catch your eye?

[Malinter 3,065]

Sounds like some sort of "Bootstap Paradox" shinanigans going o there. 

 

Make a time machine, go back in time to leave a note about making a time machine. Question is, who made the original note. XD

[Riganthor 484]

time travel is so confusing. But hey you can meet yourself.

[DJShy 968]

I believe that there is no such thing as time travel, but rather dimensional travel. The way I see it, it is the only way to make it work without destroying all of time and space and still have others sell and buy such a device.

 

Here, let me explain my reasoning:

 

 

Let's say you used "time travel" to the past. Actually, let's not because, in my opinion the original post explains the whole problem there. That thing about changing it would cause you (past self) to not want to change it, causing you (still past self) to not go back and change it, which will cause it to not change, and the paradox consumes all.

 

However, with what I'm saying, by traveling to "the past", you go to an alternate dimension where everything is the same except you (current self) go to the past. through this logic, you can change history all you want with no consequences of your actions in terms of time and space. You go to the future, which it is another alternate dimension, but it is one where you (current self) affect the future and you (alternate dimension self) "time travels" for whatever reason they have, whether it be to change what you (another alternate dimensional self) did. You take the place of that you (current dimension's self) and time keeps going, unaffected, because everything was set in stone to happen from the very beginning of your travel.

Edited January 26, 2016 by DJShy3

[Humphrey 49]

According to the Many-worlds interpretation, when someone traveled to the past, the choice of time traveling this individual just made creates a quantum reality where he 'changed' the future. Everything can happen does happen. Both of the realities where he changed and not changed the future continue to exist, and no paradox could be created.

[ISleepNow 20]

Time travel into the future is relatively easy.  Into the past is mostly impossible.  Time is just another dimension but from our universe it isn't in any direction perpendicular to our frame of reference that we can manipulate physically like the other 3.  Rather, it is parallel with the course of our entire universe's course of entropic expansion.  This makes it kinda hard for us caught in the middle of it all to 'reverse directions'

[El Duderino 881]

You should talk to this guy.

 

It is theoretically possible to travel back in time, but even more difficult than traveling forward in time. The most promising theory involves wormholes, but I don't know all the details.

Edited January 27, 2016 by El Duderino

[Snake 516]

Time Travel is impossible unless you were recorded being in said past. I believe that going to alternate timelines may be possible though. (At least more probable that going back in time)
Going forward in time is impossible for obvious reasons.

[TeeSix 116]

If Stephen Hawking is correct, we can travel forwards in time but not back. Forwards in time can be achieved by travelling very close to the speed of light, as time appears to slow around the traveller to stop them from breaking the speed of light. As a result less time passes for them than for everyone else.

 

Backwards in time is theoretically impossible, as one would have to exceed the speed of light, a physical impossibility with our current model of the Universe's physics. However recently some particles of a nature I unfortunately cannot remember off the top of my head were reported to have reached a destination an extremely tiny fraction of time before light, so that may change things quite majorly.

 

It is also worth noting that humanity, as far as we are aware, will never achieve reverse time travel, as we have as of yet received no visitors from the future.

Edited January 27, 2016 by AC IV E1

[Invincible 2,092]

Well, the possibility of creating a time paradox is something that somewhat conflicts with time travel. Unless you can somehow extract yourself from the timeline, etc. 

[Mand'alor Dash 2,225]

 

 

However recently some particles of a nature I unfortunately cannot remember off the top of my head were reported to have reached a destination an extremely tiny fraction of time before light, so that may change things quite majorly.

 

That would be neutrinos (hope I spelled that correctly). And yeah, this could have tremendous implications if it is indeed possible to break the speed of light. I highly doubt it would lead to backwards time travel, however. Not unless we could accelerate the Earth itself to those speeds.

[TeeSix 116]

That would be neutrinos (hope I spelled that correctly). And yeah, this could have tremendous implications if it is indeed possible to break the speed of light. I highly doubt it would lead to backwards time travel, however. Not unless we could accelerate the Earth itself to those speeds.

 

Ah yes, neutrinos, you're correct. Quite a conundrum to physics they hold. I can only imagine the wonders of knowledge that surround those tiny particles.

[Buck Testa 5,505]

Time travel is theoretically possible, but extremely dangerous. In fact if Time Travel were ever founded I highly doubt interacting directly with the past with physical bodies would be allowed. 

 

Think about this. As we have evolved and developed, so has bacteria, diseases, and a host of other things. Thousands of years ago people did not have the ability to process milk after  the age of 4, and now we are able to do it throughout our lives.

 

Sending a group of people to the past would be like sending Europeans to meet the native Americans back when the U.S.A wasn't even a twinkle in Uncle Sams eye. We are talking epidemics of super advanced diseases and viruses that have learned to bypass any and every defense our bodies have. Black Plague levels of death would occur.   

 

If time travel or dimensional travel is made, it would be in our best interests to either have Sterilized surrogates that can't wipe out the past with super bugs, or do it via transmitting your consciousness into a younger version of yourself "days of future past" style.  The latter would probably take less energy to do than sending matter back in time while keeping it in tact. 

Edited January 28, 2016 by Buck Testa

[Thermonuclear Kitten 70]

Ah yes, neutrinos, you're correct. Quite a conundrum to physics they hold. I can only imagine the wonders of knowledge that surround those tiny particles.

 

Tachyon Anyone? Anyone? K.

[TeeSix 116]

Tachyon Anyone? Anyone? K.

 

I've done a bit of reading and it'd seem the neutrinos travelling faster than light was an error/miscalculation, so physics is still correctly modelled. Tachyon-wise though, we haven't really got any conclusive evidence they're real or even if they're at all possible.

[Nsxile 29,278]

Going forward in time is technically possible... Going backwards in time, however, is the implausible part of time travel.