Quote Originally Posted by Microwave View Post
Shando is right in saying that there is not enough force to accelerate an object to the speed of light, though i don't think you mentioned (sorry if you did) that the reason for this is that when an object gains velocity it also gains mass, an almost unnoticable amount at low speeds, but when travelling close to the speed of light it gains a large amount of mass. As Force = mass times accelleration, the force must increase enormously to increase the accelleration further.

As for actuall time travel, as far as we know it is physically impossible to travel backwards through time, however, there was an experiment that involved travel forwards for the individuals involved. Two nuclear clocks (extremely accurate and will never slow down or speed up) were in New York, and both set to the exact same time. One was loaded onto a jumbo jet and flew to England, while the other stayed in America. When the clocks were compared afterwards it was found that the one that had been on the plane was a tiny amount behind the other. So the passengers on an airline are experiencing time quicker than those on the ground. It has also been theorised that astronauts are about 10 seconds younger than they would normally be after they come back from a space trip.
This isn't what most people consider time travel, this is something you can experience on a regular basis. This form of time dilation is a gravitational effect, nothing to do with the speed at which the measuring device travels. Both are functioning as intended, they're just too dumb to realize the effects of gravity on them relative to the clock on the ground. You're by no means traveling through time as both situations are occurring simultaneously.