Time Travel?

We all know that science-fiction creator and people with imagination from long time was playing with Time Traveling and things like that. Let's say that one day people will create time machine that will allow you to travel in time to any moment in history of earth. Who would own such a device? What right to use will he have? Think about it even a single change in pass can make a TERRIBLE changes in future. Will a single country or a man could just keep it for him self only?

For example going back in time to the moment in history helping your country would make future totally different and no one would remember you after you get back because you would never born.

Another thing is that we could be visited by people from future that already build time machines. They could move them selves in to the pass becoming famous people that we know as great people of history. Maybe our history is already changed by someone?

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Albert Einstein showed that space is curved, time is relative, and time travel is theoretically possible. Here, do a simple thought experiment and learn to think like the century's greatest scientist.

Who would have right to Time Travels?

Discuss.

Jam it back in, in the dark.

Originally Posted by B4-Hunter

Who would have right to Time Travels?

Discuss.

Only people with the proper qualificiations. They should have experienced time travel of some form in the past.

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Like this man. Be warned: by clicking this spoiler you may set off a chain of events that will alter space and time forever.

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Who didn't expect this shit to get posted in this thread. Seriously.

There's nowhere I can't reach.

I think Time Travel wouldn't occur in human history. ever. If you could explain the grandmother of Time Paradox, then you we might have our time machine someday. The concept of time travel is just too transcendent to our logic. I don't think humans could build one.

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Originally Posted by Kurado

Only people with the proper qualificiations. They should have experienced time travel of some form in the past.

And what about the future? You think that government will only stick to history purpose adventures? They will want to travel in to the future and find any new weapons that they can use against others.

With all this terrorism around even in well guarded facility time device isn't safe. Then only one question is left: Should we even try to create such a device?

I am a dolphin, do you want me on your body?

If time travel could exist at any time, it would exist at ALL times because inevitably some moron would die and lose their time machine in the past. It's a statistical certainity.

How ya doing, buddy?

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For example going back in time to the moment in history helping your country would make future totally different and no one would remember you after you get back because you would never born.

I think this is why time travel shouldn't be done. It appears that there's harsher consequences to changing the flow of time.

What kind of toxic man-thing is happening now?

Originally Posted by B4-Hunter

They will want to travel in to the future and find any new weapons that they can use against others.

How absolutely dreadful! What kind of monster would ever try such a despicable thing?

Right, anyway. To say it's possible, even theoretically, is somewhat untrue. For example, take special relativity in its simplest form. The factor that governs time dilatation and space contraction is called the gamma factor and is defined as being the inverse of the square root of 1 minus the square of the speed of the object being observed relative to the observer divided by the square of the speed of light, that is gamma = 1/(1-v^2/c^2)^(1/2). Without going into details, the way it ties to time is with the following equation: t' = gamma*t, where both t' and t represent time in different frames of reference, that is, for different observers. Now, looking at the definition of gamma, we see that as the speed of an object nears the speed of light, gamma becomes larger and larger, that is, it tends towards infinity. Worst, when the speed is equal to the speed of light, you have a division by zero. That's the first half of the problem. To actually "go back in time" you'd need to have a negative gamma. The square root makes that impossible. If we were to assume that complex numbers somehow have an effect here, then we'd still need to go faster than the speed of light (that would still leave us the division by zero problem, of course).

The second, without going into details, is that while the kinetic energy of a moving object is usually given by Ek=1/2*mv^2, this is, like most classical mechanics, an approximation which doesn't hold well at velocities near the speed of light. In special relativity, the amount of kinetic energy contained in an object tends toward infinity as its speed tends toward the speed of light, so inversely, to get to the speed of light, you need infinite energy. What we know of cosmology essentially tells us that matter and energy are finite, making it impossible to reach the speed of light (for any particle with a rest mass larger than zero anyway). Of course even if it were to be possible, there'd still be the things I pointed out in my previous paragraph.

General relativity might give more precisions about this, but unfortunately, manifolds and their kin are still too complex mathematical objects for me to understand well.

FELIPE NO

General and Special Relatively is soooooo passé.

They may work at a certain level, but the model is still incomplete.

What, you don't want my bikini-clad body?

Time travel always bites like a mosquito at my mind when thinking of things like Harry Potter, Shadow of Destiny, the Butterfly Effect, and Chrono Trigger. The idea of a time paradox is what makes me think that it's so illogical. You can go back and visit yourself but then you would mess up the entire flow of time if you did that.
How could you change events after having met yourself?
How could you live or get through a certain situation if you survived/did not survive to be able to go back in time?

If time travel was possible, then I would force myself to think of the concept that there are infinitely many timelines, and that if you do mess up somehow when time travelling, then you just change the timeline you and others exist in.
So I think we should never even try to come close to that possibility of time travelling.

Jam it back in, in the dark.

Assuming it was possible, I don't think one should ever be built. There are a ton of ethical questions to consider, and even then we don't know everything that could possibly happen. If you did go back in time, and accidentally kill off one of your grandfathers before one of your parents was born, then theoretically you shouldn't even exist.

Unless the theory of parrallel universes exists, which basically says there are an infinite number of universes, which are following a similiar path, but different things are happening on them. For example, let's say in this world, you have a choice of having coffee or tea for lunch. In this world, lets say you chose coffee. In the alternate universe, you would've chosen tea.

And that's just your decision. If we go with the parrallel universe theory again, not all events on Earth would happen the same. World War 2 for example, could've taken some very different turn of events. If someone went back in time to kill off Adolf Hitler before he became a big threat, they'd alter the course of history forever for that universe. And someone like Stalin would probably take his place anyway. Or lets say you helped him to win (by giving the Nazi's plans on how to make a working atomic weapon, which he would not have hestitated to use at all), you would be making the world worse for the people living there.

I don't think anyone has that right to tinker with history like that. While they may have good intentions (or not, depending on what they believe in), they may indirectly be responsible for something more terrible happening in the long run. Plus, if you go back (or even forward in time), you may never again end up in the same universe that you left from, and that's something you have to seriously consider (probably won't be a problem for a lowlife thug, but for others it does pose some serious problems) before you do such a thing.

Yeah, the stuff I'm saying is why time travel is such cannon fodder for stories, because if you're creative enough, you can come up with some pretty interesting stories from them. Let's just hope that they never become a reality, or if it does, the people using it are ethical enough to not interfere with the events of the world their visiting (we could have time travelers here for all we know, who are probably studying us or just on vacation and want to avoid drawing attention to themselves. Cause you know that if you claim to be a time traveler, most would say you're nuts, but the government will probably take you to Area 51 to probe you and steal your device so they can use it for themselves).

There's nowhere I can't reach.

I think that time travel and parallel universes are not so similar things. To travel in time you need time device to travel through parallel universes you need to find portal or gate to it or create wormhole to it like in Sliders.

As for the time travel there was idea of traveling in space in time. Maybe trawling in time is just way of finding right wormhole to the parallel universe that present earth in certainty time period.

IF time travel would exist, human should think of a way to discover history without letting anyone see him. Some cloaking device or something.

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Even if you could time travel, what are you going to do about the fact that the Universe itself is not stationary?

"Oh well we figured out that time travel stuff, problem is that we forgot one little detail. Now we are 300 million light years away from home and 100 years before this technology was invented. We're screwed."

I am a dolphin, do you want me on your body?

Time device should be small so you can take it with you or it should be a vehicle that you can travel inside. As for the place you will land there need to be some static point that everything else will be depending like sun or star. That's how you will know exact coordinates.

I was speaking idiomatically.

Time Travel has limits all surrounding the same basic ideas but in different ways. Many say that you would only be able to go as far back in time as the creation of the time machine, while others say you can go back as far as you want, but cannot return forward.

Theres tons of different ideas. There was a guy named Tippler who came up with a rotating cylinder that had a great deal of promise. We just need to know how to find an inexhaustable amount of energy.

What kind of toxic man-thing is happening now?

I think what people need to know is how time travel works. Is it like a Star Trek teleporter? Do you just materialize out of no where? Do you travel in an alternate space of cosmic designs/backgrounds? Do you go out to space, travel in the opposite direction of Earth's orbital spin, then land back onto Earth?

Then you have to realize what may happen if you do make a successful trip. Will your heart be where your liver was? Etc, etc, etc.

But for the uses of time traveling devices/technology, I'd say it would probably be owned by some organization of researchers who would be moderating the usage. Being allowed to ride it for reasonable requests would be alot like doing some monotonous quest in WoW or FFXI. You have to go do this, then get that, then do that, then go there, then talk to him, her, it, that, those, etc. Then once you've obtained all the required qualifications, you get tested at the research center. Pass = yay you get to ride the time machine. Fail = ultimately be banned from ever going near it. That's just what I think.

As for moral issues regarding whether this group of researchers can be trusted, or not, that's entirely up to the decision of various other groups. There would be some huge commitee that will decide which group of individuals may be granted the responsibility of moderating this tech. And yes, even that commitee can be corrupt enough to allow misusage. But hey, it's power and releasing it to the world is the first step to ultimate destruction.

FELIPE NO

Originally Posted by B4-Hunter

As for the place you will land there need to be some static point that everything else will be depending like sun or star. That's how you will know exact coordinates.

I'd say that there is no thing such as a static point. Even the sun moves inside the galaxy. Otherwise, how could galaxies look like spirals if not because of spinning?

Also, consider that if you managed to land in (or even near) a star, then you've messed up the thing...sun tan oil won't help :lolsign:

What, you don't want my bikini-clad body?

Haha. I forget which movie/show it first appeared in (Duck Tales, I think?), but having a device like that remote in that Adam Sandler movie Click that controls time... that would be fucking awesome. I would abuse that. Oh, and only I should have it.

How ya doing, buddy?

So after all this we come to the conclusion that even if someone will invent time travel it's impossible to travel =D You never know where you will land or what will see. There is no static point in universe and it's still growing. Besides if would take years to make calculations of earth position few hundreds years earlier.

There's nowhere I can't reach.

I never took a course in time theory or such, but one question that pops in my mind is if the object that travels time retains its properties. I know in black holes time travel is possible, but there is no way a living organism can escape alive. So if time travel is indeed possible, I don't think there is any way we can live through the travel. Who knows, maybe you'll become horribly disfigured after the experience.

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Time Travel would never be possible. Time only moves forwards and does not work like a video recorder. Its physically impossible. If by some odd chance that someone does pop back in time and slaps me for saying this then, ok I will eat my non existant hat, but otherwise it will just never happen.

In answer to the question tho, I think people who have been through proper training and completed years of tests for their actual intelligence so they wouldnt go back and say, throw a toaster at Clinton or something, so the whole of the time line messes up. Going back in time instantly makes you the most powerful person on earth, because you can very easily change the entire course of history, you could give out the winning lottery numbers to your past self, or even assasinate the president and not get caught. Its a whole riddle that I dont think will ever be solved, ever, but would be damn cool tho.

I am a dolphin, do you want me on your body?

My guess is that time travel isn't possible. If it were, some being from the future would have inevitably already fucked up time for all of us, intentionally or unintentionally. I also think time travel would destroy the universe by suddenly throwing in matter that's not supposed to be there.

I was speaking idiomatically.

Ultimately, time travel is a really bad idea, considering all that could go wrong if we believe our current theories with time travel. If time travel was ever "invented" by someone outside of the government, it would probably be destroyed if they ever did hear about it. Despite the possible uses a government could have for a time machine, I don't think any administration would be brash enough to try tinkering with time.

However, if a government were to try messing with time, I don't think they'd ever send an actual human through time. It's too risky; the ramifications of sending emotional people with wills and thoughts of their own would be endless. Besides, you can't effectively police time. Once you send someone, they're as good as gone. I guess we'd have to have intelligent androids by then, who would only do what they're told.

Time travel....eh. Although I think in theory that a person can move through different "areas" of time in the universe (meaning, they can go and then return to one, only to find they are a lot older or younger then everyone they once knew), I don't think this will ever happen to any person, nor do I think it has or will ever happen to any "person" in the universe, no matter how intelligent or technologically advanced a race becomes. I buy into relativity to a point, but I don't think going the distance it takes to see a difference in time would ever be possible with the physical means we have in the universe (if we ever even have the means to access anything physical off of earth in the future).

What kind of toxic man-thing is happening now?

One thing I would like time travel for is in the study of history. So many questions would be answered because of it. Now a way to make it work probably is that we only observe and do not disturb anything in the past maybe by a hologram or perhaps a nanomachine equipped with a camera and microphone that can record data and can be observed by someone in the present.

For time travelling where you can physically visit the past and interact, I don't think it should happen as we as humans do not have the capacity to handle it. We still rely on our animal instincts and our other flaws. If we can somehow over come that and squelch our petty differences, then maybe it would work.

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Time travel is simply impossible. Time doesn't even move. It's a human invention designed to explain the way we progress through our lives and life in general. Since you can't call a point in history a location, you can't travel to it.

It's a fun concept to wrap your mind around, but it'll always remain science fiction.

What, you don't want my bikini-clad body?

Originally Posted by Cellius

Time travel is simply impossible. Time doesn't even move. It's a human invention designed to explain the way we progress through our lives and life in general. Since you can't call a point in history a location, you can't travel to it.

It's a fun concept to wrap your mind around, but it'll always remain science fiction.

Then what about Black hole?

Space-time distortion and frame of reference

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Objects in a gravitational field experience a slowing down of time, called time dilation. This phenomenon has been verified experimentally in the Scout rocket experiment of 1976, and is, for example, taken into account in the Global Positioning System (GPS). Near the event horizon, the time dilation increases rapidly. To the distant observer, a falling object's movement slows down, approaches but never reaches the event horizon. Any escaping photons do not slow down when escaping the gravity well but experience redshifting. From the falling object's frame of reference, it will cross the event horizon and reach the singularity at the center of the black hole within a finite amount of time.

So if time can get slower then maybe even can be stopped or turned back? Using this maybe we can even make it go faster? Think about it.

Jam it back in, in the dark.