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Time dilation would make it possible for passengers in a fast-moving vehicle to travel further into the future while aging very little, in that their great speed slows down the rate of passage of on-board time. That is, the ship's clock (and according to relativity, any human travelling with it) shows less elapsed time than the clocks of observers on Earth. For sufficiently high speeds the effect is dramatic. For example, one year of travel might correspond to ten years at home. Indeed, a constant 1 g acceleration would permit humans to travel as far as light has been able to travel since the big bang (some 13.7 billion light years) in one human lifetime. The space travellers could return to Earth billions of years in the future. A scenario based on this idea was presented in the novel Planet of the Apes by Pierre Boulle.
Originally posted by swinggal
I would never knock back a trip to the future - as long as I could come back. 100 years into the future I would be alone with no friends of family, so I would not want to stay.
But, I really have a connection with the past. I am a huge 20s, 30s and 40s collector and would love to travel back to my favourite era - the late 30s - to visit the jazz scene in Harlem. I would want to take plenty of cash with me though as things were not easy in the 30s.
I am also open to the belief that time travel is and has been possible for some time. I just can't rule it out.
Also if you travel back in time you alter history in some sense by participating in anything. All you could safely do is quietly observe. And not much of anything else.