Another interesting idea: Professor Stephen Hawking's theory is that humankind will never reach the point where we can travel back in time. The reasoning is simple : where are the time travellers?

More evidence of time travel: These things called "Mazons" (Masons, Mazens, something like that, I can't find the correct spelling), are emitted from the sun. They have a halflife of less than a second, yet it takes 8minutes earth time for light to travel the 93,000,000 miles from the sun to earth. How is this possible without the Mazons completely decaying? The answer is simple, because they are travelling at such a high speed, time is much slower for them, and thus they survive. In essence, they are travelling into the future.