Corrected entry: When the machine is being described, it is stated that Einstein's theories proved that time travel is impossible. In fact, his work on relativity show that time travel is theoretically possible and Einstein, not believing or liking this, spent some time trying to find a way to prove otherwise, without success.
jle
12th Jan 2004
Correction: Einstein's theories stated that time travel would be possible if we could travel faster than the speed of light, however, his theories also stated that it is impossible for us to travel faster than light, as we have a mass. However, since light has no mass, it can be (theoretically) accelerated beyond the threshold, which is what the science of this movie is based upon. What Einstein spent much of his life trying to refute is quantum theory, not time travel.