I can disprove that last line wrong!
It is possible to travel through time! I can disprove it! The only thing is that it is late here and I dont have the time, so i'll make it short and simple:
Going into the future faster than the aging process allows: Possible - i mean, if you go into the future it doesn't really affect the past
Going into the past in any way: Impossible. You would have done it already, or if you went someone may have gone back with you to prevent it, or something, so it never will happen.
In fact, check up your research! There is one man, an early cosmonaut, who stayed at the relative speed of about 17,000 mph for so long that he is 1/52 of a second into the future because the faster you reach the speed of light the more time slows around you.
...but good point. I only base my scores on the actual movie. Good job there ;)