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My definition of time is that it was created to measure change. When you think about time, what is it really, it is not a thing, it is a measuring devise. The most accurate change measuring devices measure things that change at a constant rate, like an isotope, or the celestial movements of the planets surrounding the sun. Change is what defines this universe, everything is changing even the universe is expanding at a certain rate, maybe we can clock that and make that our standard for the measure of change.

To imply that time is a dimension is ludicrous, that would be like saying that the rate of change is a fourth dimension. Change requires space and it requires a certain amount of energy. Does that mean more energy = more change? I don't think so, the changes are taking place at a constant rate. If you were traveling at the speed of light the changes taking place are constant but it is the measurement of those changes relative to the universe that is the problem. Take for instance the degradation of your cells (getting older) the rate of the degradation of your cells would be constant whether you were in Chicago or if you able to travel half way across the universe in an instant, you would arrive over there and would be just as old, that is if you could travel the speed of light and keep you cells intact. Everything has mass, and even the slightest differential of mass or even space between things of mass would be disproportional when traveling the speed of light and would disintegrate. That is why the only thing that is traveling at the speed of light is light, it has no mass.

Time travel: When you think about the changes in the universe that take place in like a second, it is mind boggling! Everything is in movement and changing, electrons encircling a nucleus, cells splitting, microbiological processes, all of us scurrying around and moving and changing, the planets in their orbits, the universe itself and all of the mass, it is not static it is forever changing. You could define this physical universe in terms of change. In order to time travel back in time you would have to somehow reverse all of those changes, impossible. The only time machine that I can think of, would be freezing, which would mean that your body's changes would be suspended or reduced relative to the changes that are taking place in the universe and you would wake up in the future.

Learn more about this author, Mac Mcleod.
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