AfryChi
Although what the person above me says sounds like a stupid first thought, it douse raise a question. Why isn't it considered time travel? I mean, other people see you the whole time, that is true, but you do not realise that hours have passed.
I thinks that, for activities like sleep, we should create another category of time traveling. Falling into coma or loosing consiousnes wouls fit in that category. I may seem nonsense at first, but just think about it before jumping into conclusions.
Because your perception of time isn't what time is. A rock, never being aware of time, isn't said to instantaneously travel from the moment of it's creation to the moment of it's destruction. Your body is still traveling through time though you're not aware of it. You still age while you're in a coma or asleep. I mean, we wouldn't say you time travel if you take the batteries out of your wrist watch, would you?
That being said you can time travel in this kind of way simply by traveling at high speeds. Things like photons actually do instantaneously travel from the moment of their creation to their destruction (or absorption, more likely). If photons somehow had a clock attached to them with out slowing down, that clock would never tick, ever. If you were to say, travel at 90% the speed of light for a week, and spent another week at the same speed coming back (2 weeks travel at .9c), you would have time traveled about a month in a week. That is, you on your space ship age 2 weeks while everyone on earth would have aged a month. As you get closer and closer to the speed of light the effect gets exaggerated more and more. At .99c, for the same 2 weeks, people on earth would have aged 3 months. This effect isn't just about perception, clocks would tick differently, no matter what kind they are: Mechanical, electric or atomic. Your body would also age slower, unlike in a coma.
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