Hi ppl,
do u khow about the letest theory that we may be able 2 test time travel from time travel.
http://newscientist.com/Channel/fundamentals/mg19025521.600
or give a google srch with-At last a way to test time travel.Log into the one of new scientist
but i hav a problem.Did not understand a line-'because earth is rotating,these faster-than-light neutrinos can appear to have arrived before they set off.
Whats the connection with rotation of earth?Read it and discuss...Bye
Last edited by Physicist on Sun Feb 11, 2007 5:01 pm; edited 1 time in total hey, i dont think travelling back in time is possible, cuz if it were, we wud be able to see people from the future, wouldnt we?
| angel_of_death wrote: |
| hey, i dont think travelling back in time is possible, cuz if it were, we wud be able to see people from the future, wouldnt we? |
That isn't necesserily true. First, you have to assume that a civillization that can travel back in time is far far superior than us. And we don't know how these people will think in the future about showing themselves to such primitives as us today.
1. Maybe they are here with us, just don't show themselves (maybe they don't want to scare us, most people today would shit they pants if they knew that people from the future can come and watch us - not all of love scince and science fiction and would be thrilled to see a human from the future)
2. Maybe they are so superior to us, that we don't interest them, they might have better goals in life than talking to primitives, like exploring other galaxies and stuff...
3. Maybe they did show themsleves to someone who they knew would keep it a secret...
4...
There are so many possibilites, that it's pessimistic to assume that it's not possible, just because we haven't talked to them yet. | angel_of_death wrote: |
| hey, i dont think travelling back in time is possible, cuz if it were, we wud be able to see people from the future, wouldnt we? |
Well, if multiverse theory is correct, then the people from the future create a new, parallel past when they travel to it. They experience the new past, and would not be able to tell it from the old past, other than the changes they make to it, while the original past (our present) continues to exist just as it did and eventually produces the time travelers.
This theory both explains the reason why we never see people from the future, and shows us how time paradoxes won't be a problem. (If the person from the future kills his grandfather, the grandfather in the original past is still there to produce the person from the future's father, while only the copy in the newly split off universe is killed.I would think that if time travel was possible then we now (present) would see ourselves from the future, however, how can that be? First, if it were true, how can I see myself from the future, if the future was never writ? Second, if it were true, how can there be two instances of myself? If it were my mind, then would I be controlling/seeing/feeling/thinking everything that my future-me did? That seems quiet impossible. Third, I'm sitting there in the present, how would I be able to come from the future, if the future was never written therefor I would never have made the choice to time travel... Therefore, to conclude, I would say it could never ever happen. There are just too many counter-examples...
Sorry if any of these points fall through on themselves, yet it makes sense in my mind. 
| Comatose wrote: |
1. I would think that if time travel was possible then we now (present) would see ourselves from the future, however, how can that be?
2. First, if it were true, how can I see myself from the future, if the future was never writ?
3.Second, if it were true, how can there be two instances of myself? If it were my mind, then would I be controlling/seeing/feeling/thinking everything that my future-me did? That seems quiet impossible.
4. Third, I'm sitting there in the present, how would I be able to come from the future, if the future was never written therefor I would never have made the choice to time travel...
5.Therefore, to conclude, I would say it could never ever happen. There are just too many counter-examples...
Sorry if any of these points fall through on themselves, yet it makes sense in my mind. |
1. a) time travel will almost certainly not be available in our lifetime, so don't expect yourself to visit you at all.
b) maybe when time travel will be possible, politics won't allow people to travel back in time and show themselves to us
c) see my previous post in this thread
2. the future is not written from OUR point of view, but for them time travellers, our future might be known
3. you would be controlling yourself and talking to the future you would be like talking to your brother for example. and vice versa - the future you would feel like he's talking to a younger brother when he'd be talking to you from today. consciousness is a product of chemical rections in your brain - so each individual controls/sees from/feels only his own physical body. (unless you believe in a "soul" that is separated from the physical body, then you'll have to come up with something on your own)
4. more or less the same question as no.2
5. physicists today believe that our universe is only a bubble in a big foam of universes - and that time is not a straight arrow, but it's like a river with many little rivers - and when you travel back in time, you're actually travelling to another universe and all these paradoxes are gone... more or less.
if you're interested in time travel, parallel universes, higher dimentions... then check these videos to get you more pumped up - http://www.mkaku.org/videos.htm - if they do, then reading a book or two is a good choice. "Parallel Worlds" by Michio Kaku is surely a good one, even though I haven't read it yet. also "The Elegant Universe" by Brian Greene - I read it and loved it, it totally changed my view on the world.
| LovE-RicH wrote: |
1. a) time travel will almost certainly not be available in our lifetime, so don't expect yourself to visit you at all. |
Cheap time machines at local shops - go and buy a small 5 inch-8 inch reflecting telescope. You can then travel back in time whenever you like just by looking at the stars....The further you look the further back in time you go. | Quote: |
| 5. physicists today believe that our universe is only a bubble in a big foam of universes - and that time is not a straight arrow, but it's like a river with many little rivers - and when you travel back in time, you're actually travelling to another universe and all these paradoxes are gone... more or less. |
Hmm..some do and some don't. Multiverse theories abound but they are still not mainstream I would say....
One piece of interesting news in this area is the possibility of a test for string theory
http://cmu.edu/news/archive/2007/January/jan23_stringtheory.shtml
if you're interested in time travel, parallel universes, higher dimentions... then check these videos to get you more pumped up - http://www.mkaku.org/videos.htm - if they do, then reading a book or two is a good choice. "Parallel Worlds" by Michio Kaku is surely a good one, even though I haven't read it yet. also "The Elegant Universe" by Brian Greene - I read it and loved it, it totally changed my view on the world.[/quote]
Hmm..sounds interesting...I've been meaning to get hold of some Kaku writings and I think the time has come to make a proper effort... | Bikerman wrote: |
| LovE-RicH wrote: |
1. a) time travel will almost certainly not be available in our lifetime, so don't expect yourself to visit you at all. |
Cheap time machines at local shops - go and buy a small 5 inch-8 inch reflecting telescope. You can then travel back in time whenever you like just by looking at the stars....The further you look the further back in time you go. |
Yea, yea, but I ment time travel of physical bodies, not our mind.
Wow, cool! I'll be holding my breath once LHC at CERN starts operating. | LovE-RicH wrote: |
| Bikerman wrote: | | LovE-RicH wrote: |
1. a) time travel will almost certainly not be available in our lifetime, so don't expect yourself to visit you at all. |
Cheap time machines at local shops - go and buy a small 5 inch-8 inch reflecting telescope. You can then travel back in time whenever you like just by looking at the stars....The further you look the further back in time you go. |
Yea, yea, but I ment time travel of physical bodies, not our mind. |
Hmm, that is a very deep area all on it's own in light of much that we know. Mind-body-consciousness is a deep area of study with many on the scientific edges, including some who I have profound respect for like Roger Penrose. However now is not the time to get into a deep discussion of quantum consciousness, mind-body interdependence and the like.
Suffice it to say that my own opinion is that the time travel that you seem to want will remain beyond us for the foreseeable future - perhaps indefinitely. Relativity is holding up well, even with modern challenges, and the theory pretty much rules out physical time travel of the sort you mean (although there are some loopholes non of them seem very practical to me).Thax 2 evrybody 4 replying.Ya i have watched the video of elegent universe.By brian greene.And reading that book.In that book(may b page 253) he said,according 2 general relativity space can b distorted but it cant b reaped or teared.Sring theory said its possible.I told this 1 or 1.5 mnths ago but Biker brother was in a debate with me that i m wrong.General relativity said its possible to tear space...!
| Physicist wrote: |
| Thax 2 evrybody 4 replying.Ya i have watched the video of elegent universe.By brian greene.And reading that book.In that book(may b page 253) he said,according 2 general relativity space can b distorted but it cant b reaped or teared.Sring theory said its possible.I told this 1 or 1.5 mnths ago but Biker brother was in a debate with me that i m wrong.General relativity said its possible to tear space...! |
No General relativity says space cannot tear , so we read from one expert: | Quote: |
| "Einstein's only restriction was that he did not allow space-time to tear. You cannot cut out two pieces of space-time and swap them over expecting the forces of nature to compensate, or can you? Research attempting to form a theory of quantum gravity suggests that space-time CAN tear and reconnect in ways which changes its topology. This book suggests that Einstein's symmetry must be extended to allow space-time to be atomized into space-time events which can be pulled apart and recombined in any permutation. The unified forces of nature must permit this "event symmetry" just as gravity already permits the more restricted co-ordinate transformations." |
Relativity, however, is not complete, because a black hole can, in some regards be imagined as a tear in space and relativity does not know how to deal with the singularity produced...Quantum Gravity theory is needed for that and it is still being developed.On a side note, if someone did come back from the future, and proclaim this loudly, would they not be deemed a madman, or just ignored. Just think, our asylums could be full of time travelers, and all they got for their efforts was to be locked away!
If time travel was possible, could it be logical to travel back in time, to a time before the time machine was invented?
I do think that it would be possible to "see" the future, but not interact with it in any way shape or form.
But on another note, in order to even think that time travel is possible, one would also have to believe that our life is already set in stone because at the same moment we are being born, we are living our life, making our choices, and dying all at the exact same time. And each and every day we live, we are born and we die, and we make the same decisions.
In otherwords, all life as we know it is running in a continuous string. The begining of our universe is starting now and at the exact same time, our same universe is also dead and gone. We can not change anything, because if something were to change, for one, it would have already changed, and for two, if we made say; a ripple in time, it would affect things on a much larger scale than the human mind could comprehend...
So while I say I think it is possible to bend time and glance into the future, I do not think one could actually say that time travel itself is a reality.
And to those that believe that time travel is feasible, who is really in control of your life, when you have to think about the fact that the choices you made today, were already predetermined by the choices you already made.
this is indeed a very interesesting question. and i think we will never be able to solve it , untill we have seen a way in which we CAN travel in time. because , if now someone would claim he is coming from the future , they simply would judge him being a loonitic , and ty him up to a chair.
now , for the idea of the parralel worlds , this is something that really interests me . for instance , the deja vu -feeling. maybe parralel worlds could be an anwser to this. and who sais we are not really living in our dreams , and the "real world" is just some illusion? and so we are on edge between science and filosofie. where science explains us for what they can find proof , filosofie does it for the things we havent got any proof of.
greetz
| stephancreelle wrote: |
this is indeed a very interesesting question. and i think we will never be able to solve it , untill we have seen a way in which we CAN travel in time. because , if now someone would claim he is coming from the future , they simply would judge him being a loonitic , and ty him up to a chair.
now , for the idea of the parralel worlds , this is something that really interests me . for instance , the deja vu -feeling. maybe parralel worlds could be an anwser to this. and who sais we are not really living in our dreams , and the "real world" is just some illusion? and so we are on edge between science and filosofie. where science explains us for what they can find proof , filosofie does it for the things we havent got any proof of.
greetz |
But anyone travelling back to our time would presumably have done at least a bare minimum of prep for the trip and read up on us from the history books I would image (I certainly would if it were me making such a trip).
He/she will therefore not come to our attention unless that is their intent and if it is, they will surely bring something to prove their story since this will inevitably have occurred to them unless we are supposing a high-tech moron which seems unlikely. A copy of a paper or other record with detailed information on events still in our future would be my first thoughts of something of the kind.....not a poxy horoscope type thing....a detailed account of a day's news for next week would probably convince most people..
Chris
Last edited by Bikerman on Mon Feb 05, 2007 3:23 am; edited 1 time in total | angel_of_death wrote: |
| hey, i dont think travelling back in time is possible, cuz if it were, we wud be able to see people from the future, wouldnt we? |
John Titor claimed to be from the future. But he's considered to be a fraud because time travel isn't possible. But time travel isn't possible because no-one has come from the future... sound like faulty logic?
