Didn't Einstein say something about this?.. I believe he mentioned some odd theory about this, something to do with his relatives :lol:

Time slows down as you reach the speed of light so that if two people of the same age were in the experiment, one went off in a spaceship at the speed of light then when he returned 70 yrs later, the person in the space ship would have only aged during the time he was speeding up and slowing down making him much younger than the person he left behind. If the accelleration and decelleration process was instantanious, then the person in the spaceship would be 70yrs younger than the person on Earth.


something like that...

I'm not sure that theory has been proven though, although his theory about gravity also travelling at the speed of light has been proven.