Light speed and Time Travel?

It is my understanding that the only thing that can travel time, should it be possible, is light because the only way to travel time is to go the speed of light. If I'm right, I want to know why if light is somewhere, it isn't "everywhen" too. Like, if I turned on a flashlight and shone it across my room, why isn't that same light shining in 1956 in the same exact spot, or in 3045 in the same exact spot?

thats time n light
and it cud be explained by e=mc^2

I don't think you can say that light travels in time. Relativity says that any observation is from the observer's frame of space, time and inertia. If you move in space, you move in time. The famous 'twin paradox' is also valid for e.g. two twins, one living near the sea and the other on the top of a mountains. One will be a very little fraction of a second older than the other.
In principle, anything with a mass cannot travel to the speed of light because the mass will increase to the infinite and time will stop.
But then, it is in relation to another frame of observation. Say, you were the light: time would move normally in your own frame, but you would observe the rest of the universe as ageing instantly.
But when you are the observer observing the light, things happen as it should: lights move at the speed of light, even if emmited from an object that - relative to you - is in own motion.
Relativity has many intersting aspects. Imagine this: You started flying a spaceship some 40 years ago and your super-duper engine gives you an accelaration of one G. Splendid! It gives you the feeling of gravity you are used on earth. But now, as you come nearer the speed of light, you notice that you weight less. Say, 80% of your normal weight. That is because, coming close to the speed of light, your mass increases. Imagine now that you decide to stop you engine and go to sleep in zero-gravity. Next 'morning' you wake up, have breakfast and look outside. Nothing to see in the vast emptiness of the intergalactic space. Nothing can really tell you your speed. You feel motionless.
Now you start again your engine. Rats! Only 80% of the acceleration! Somehow your engine has remembered all the accelaration since you left earth 40 years ago!
That's your frame of inertia that you will drag with you as an observer!

Very perceptive- your right in saying that if you were to travel at the speed of light you would see time stop everywhere else, and could get anywhere in no time at all because everywhere in the universe would be inifinitly close to you. This does raise some interesting questions about what it's like to be a photon- for example, photons don't technically have a 'lifetime', because they last no time at all. And from there point of view they are indeed everywhere at once.

As interesting as all that is, it's only valid from the photon's reference frame. For those of us not travelling at the speed of light we observe the photons travelling around normally, at the speed of light of course, taking time to get to places and being emitted and absorbed and so on. So that is why the light isn't still shining a thousand years later, from our frame of reference anyway.

by its very nature,time travel will be discovered at every point of time,because if "they" discover time travel at some point in the future,they would of come back to our time,or earlier & said "hey look what we have done".they havn`t done that yet,so therefore they never will.there is no time travel.

that's not exactly how time travel works. you have to be moving faster than the speed of light to travel in time. light is not faster than itself. so it can't go through time. in order to travel through time, you have to somehow be faster than light, and to do that you must be out side of the rotating universe.

do you get it? it can be confusing when you mess with the space -time continuum.

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