Time

What is Time?

Without ever getting into the terms like past, present and future, and the idea that time is an emerging concept; a layman's idea of time is far easier to comprehend. Time is just the Movement of Energy. Various factors may affect time. Movement of energy is influenced by so many things like the gravity, wind, waves etc.. Then time will accordingly vary.  So the time on earth - which is influenced by earth's gravity will be slower or faster on another planet depending upon the gravity and other influencing matters. The same way time will differ in the space of our galaxy from the spaces of other galaxies. And the vast empty spaces between the galaxies might not even have any movement of energy, which might be taken as absence of time.

Time Travel

Is time travel possible? Theoretically yes. It is like the way we rewind a scene in a DVD. You wind back the flow of energy then you come back where you started. One of the many complications in this is the idea of getting the transformed energy back to its original form or getting the same amount of energy back to the source. This could be termed as reverse transportation of energy.
These are two different ideas. Trying to rewind the transmission of energy would have to go through the same avalanche which happened during the initial transformation of the energy to become another form of energy. That is, the action which occurred when the potential energy transformed into kinetic should also happen in reverse when the transformed kinetic energy reaches back it's potential form. For example if you are punching  on a wooden table, the energy you used to punch, the mass of your fist, the surface where you punched all together would create a thud (sound). Reversing the action.
(a) The sound traveled has to be brought back to the table, nullifying the impact.
(b) The energy which was transferred from the fist to the table has to be transferred back to the fist.

It's a total reversed avalanche. Even the splattered dust on impact has to fall back in its old place. This idea is like traveling backwards.

The first flaw in this idea is that, this will affect everything around us. In our Universe, everything is connected. Google 'Particle Entanglement' to look into this. So in this well connected world, when you reverse something back, then everything goes back along. It's like if you rewind your life two years from today. Then the whole world has to go through the same thing. You would go two years younger and so would everything and everybody. But what happens to the memory stored in our brain is another question. Maybe the sub-conscious would remember things, maybe not. Maybe that is how we get Deja Vus.

Now the second idea of getting the same amount of energy back to the source. With the same example of punching on a table. Instead of bringing back the transformed energy which was absorbed by the table, the ground beneath, the dust around and the air; we could substitute a new energy to travel back the same pathway. From the sound to the table and to the fist to the arm. Or just start right away from the table's surface and transport it back to the fist and then the arm. This way you know exactly what happened and you actually transport back energy without having to disturb anything else. Another flaw here is, in the growing younger part. What happens if you travel two years before your birth; Makes this totally insane. But maybe if the transporting is done in a parallel path, things could be different. But even then everything should fall in place perfectly. The new pathway should not influence anything on the way. If it does then things change as everything is connected.

Maybe science has already worked it out. May be it will. But even the idea of  reversing time is in fact fascinating. But even if everything is in place for science to play this one perfectly, I'm not sure how to travel forth into the future, uncertain of the path energy might travel through. Perhaps they travel in a parallel path into the future too. Without having to disturb anything and just watching things happen. We may never know..