# Time travel is science-fiction

Italy
December 19, 2006 12:18pm CST
The theory of relativity states that as the velocity of an object nears the speed of light, time slows down. If person A travels for a few hours at half the speed of light and returns to Earth, that person A has aged much slower than person B who stayed on Earth. This difference in aging is because time passed much slower for person A than person B, because person A was traveling closer to the speed of light. While just a few hours passed for person A, person B experienced many years. Let's say we have a wormhole which mouth is portable. It is then carried on a spacecraft traveling at 50 percent of light speed. The other end of the wormhole is on Earth. When the spacecraft returned to Earth a few hours (according to the spacecrafts clock)later a few years would have passed on Earth. Okay, so far so good. But do we now have a time machine? No, we do not. Time has only passed slower for the other end of the wormhole. The effect of going through the wormhole would be the same as if you stepped through a space shuttle's porthole after it returned from a mission. Time in the shuttle would have only passed slower, it does not become a time machine into the past. You can't go back when there is nothing to go back to. Except maybe if you consider the shuttle is the past, because it has aged slower. Ps. I'd be happy if anyone could show me if I'm wrong. Many of the world renown scientist seem to me as a bunch of idiots when it comes to time travel and I sure would be happy if it was just me who is the idiot.
6 people like this
56 responses
@drumm1n (500)
• India
20 Dec 06
im not saying we have proof of time travel but i would still like to believe its possible! one of my theories is that time being the 4th dimension can also be used as a medium of travel! the same way we move through the 3d world! after a certain speed is reached! we stop moving in the 3d world as we know it and start moving in the 4th dimension,TIME! hence making time travel possible! i havent yet thought of direction because i feel time has no particular direction!
3 people like this
19 Dec 06
I agree with your analysis and would just like to add that it is HIGHLY unlikely a spacecraft capable of travelling at 50% of the speed of light could ever be built. Light travels at 670,616,629.384 miles per hour. 50% of that would be 335.3 MILLION miles per hour. By way of comparision, the Space Shuttle 'only' hits about 17 and a half THOUSAND mph on re-entry, and that's when it's essentially in freefall. The idea of building a spaceship that could travel at hundred of millions of miles per hour is totally impractical. What fuel could possibly produce the amount of energy needed to propel something that fast? How could the amount you'd need be portable enough to even leave the earth? What kind of material could withstand that insane level of speed? Time travel and interstellar travel are pure science fiction.
2 people like this
@cheongyc (5075)
• Malaysia
20 Dec 06
The current technology is not allowing that to happen. But in future it could just be possible. It's hard to ask a cave man imagine on how to build a Supersonic jet. Before man invent air craft, travelling by air is near to impossible to man kind.
@blanksolid (1635)
• Spain
19 Dec 06
Time Travel could be not science-fiction in the future, there are many theories about this topic, in my oppinion i think thats posibble back at the past but its much more harder going to the future. Have a nice day on mylot!
2 people like this
• United States
19 Dec 06
From what I can understand it would actually be easier to go to the future. If light speed and time are linked to gether and as you reach the spped of light, your time slows down. It would be easier to come close to the speed of light as opposed to going faster to be able to go backwards in time. I hope that made sence.
2 people like this
@usama18 (61)
• Pakistan
21 Dec 06
accordin to my knowledge time travel is not possible.the process of aging depends completly on the human body. any action can define by the time interval between two stiks of light rays ojn your eyes. so if a person is travelling at the speed of light the light rays would not strike ur eyes as u would be going in parallel with it. so u feel that time has stopped. u cannot go in the past or the future.
2 people like this
• Hong Kong
20 Dec 06
It's really a serious scientific topic. Also a topic everybody wanna think about,which makes the science fiction novel so popular. we still don't know if the current theory on space and time is right,I mean, whether the theory give a true explaination of the realationship between space and time. If it does,I think it seems the time travel is possible. But it is not returning the past, while it is going to the future. The man going through the wormhole can go to the future faster than the people on the earth. From his clock,he spent only one or two hours while it takes the people on the earth several years to go to the same date . He looks younger than his brothers. Does it seem that the person in past go to the future? I don't know the performance of the wormhole, is it reversible? I mean if you can go through it to the future side,can you go back to the starting side. If it does, it means we can return the past. If the wormhole is not reversible,then the people in the future side can't return past. They would go to their future if they go through the wormhole,and can't return his starting point forever. The basic theory is still under developing,so I don't know if it is reasonable to explain it with our current logic. That's my opinion! It's just my imagination because I have not read the relative theory carefully. I don't know if I expressed clearly.
2 people like this
• Pakistan
20 Dec 06
ye its rite its just a fiction, u can't travel in time, one can only dream of ths....: or watch it in movies like BACK TO THE FUTURE ETC...
2 people like this
• India
20 Dec 06
Ur Age is time you have spent on Earth. Calculation of time is all relative and totally numerical/theoritical. Putting all theories together and logically analyzing them does make one believe that travelling at a speed more than light will reverse one's age. I am not saying that this cannot happen or is absurd. But its difficult to believe untill u see it. Aging is also biological process. Biologically you cannot reverse the process but yes maybe theoretically you can.
@usama18 (61)
• Pakistan
20 Dec 06
Science fiction is just another form of entertainment. It contains a mixture of science facts that add depth to the fictional elements of the stories. Time travel is just an element of entertaining story telling that holds our interest because almost everyone on the planet has thought at one point in time that if they could just go back and change something they would. Your theory seems sound enough. But sometimes it can be fun to think outside the box and explore our imagination.
2 people like this
@gotcho0O (1258)
• United States
19 Dec 06
This is very interesting. It's like those movies which features time machine. But for me, it shouldn't be a matter anymore. All impossible things the people made it possible are just a sign of none satisfaction in life. I mean, God gave as life but people are keep on inventing powerful machines which is an advantage too but some are not. Remember a story of, why human beings got their own language? It says, all of them were trying to reach the heaven and started building blocks like a pyramid just to reach God. And then God sent different languages on the earth so that each of the people will hardly wont understand it. Then the pyramid got destroyed.
2 people like this
• United States
19 Dec 06
Science fiction is just another form of entertainment. It contains a mixture of science facts that add depth to the fictional elements of the stories. Time travel is just an element of entertaining story telling that holds our interest because almost everyone on the planet has thought at one point in time that if they could just go back and change something they would. Your theory seems sound enough. But sometimes it can be fun to think outside the box and explore our imagination.
@coolcager (497)
• Costa Rica
19 Dec 06
that is not so true hehe. How can you go back to time or travel time example you are here on earth and the time travel destination is on earth too. so both of you are staying on earth but with different time? so that is so impossible. But maybe 3million years from now. or 1000 years from now it will be possible heheheh.
2 people like this
• India
19 Dec 06
accordin to my knowledge time travel is not possible.the process of aging depends completly on the human body. any action can define by the time interval between two stiks of light rays ojn your eyes. so if a person is travelling at the speed of light the light rays would not strike ur eyes as u would be going in parallel with it. so u feel that time has stopped. u cannot go in the past or the future.
• United States
19 Dec 06
I was thiking about this some time ago too, but couldn't understand much about how speed and time are related, but your discussion made em thin even more. What if we were able to figure out how to build a time machine. Would it be a good idea? Because of the fact that 1 little thing could change a whole bunch of things, wouldn't it be dangerous?
2 people like this
@ramya186 (949)
• India
19 Dec 06
Fictional works – novels, short stories, fables, fairy tales, films, comics, interactive fiction, animation, video games – may include or reference factual occurrences. The term is also often used synonymously with literature and more specifically fictional prose. In this sense, fiction refers only to novels or short stories and is often divided into two categories, popular fiction (e.g., science fiction or mystery fiction) and literary fiction (e.g., Marcel Proust or William Faulkner).
2 people like this
@flowerchilde (12520)
• United States
23 Dec 06
I heard in empty space... time is differnt... can't rmember how... Not much help, aye?
@Infidel (180)
23 Dec 06
If empty space = vacuum then the speed of light is different, but remember the theory isnot the speed of light but the speed of light in a vacuum
@drrahul44 (1152)
• India
23 Dec 06
cool...
1 person likes this
• United States
20 Dec 06
Have you ever messed around with like, ok im gonna spell this all wrong, but, Phauntum phsyics and time travel and such? its really quiet spellbounding
1 person likes this
• Brazil
19 Dec 06
yeah.I can see it too now. I´m starting to read Stephen hawking 's books
1 person likes this
@tarachand (3895)
• India
23 Dec 06
Time tarvel is a no-no, because if it was possible, why haven't the people from the future visited us?
@Infidel (180)