I see we have a whole flock of Uber-geeks here. I have been fascinated with time travel and light theory my whole life.
Time is relative. Pilots in super-sonic planes (F-16, SR-71, Concord, etc.) all exprerience time travel of a sorts. The faster something travels, the more mass it gains, it decreases in size, and time becomes shorter. Pilots traveling at super-sonic speeds actually lose time. Atomic clocks have been put in planes and synchronized with clocks on Earth. Upon landing, the pilots clocks are off by thousanths of a second, indicating that the pilots experienced a relative shift in time.
Super-sonic craft are designed to shrink at high speeds. They shrink fractions of an inch in high speed travel but they actually get heavier. The theory of faster-than-the-speed-of-light travel is impossible at the moment because in order to travel at the speed of light, your mass increases to consume the universe yet you would dissappear (black hole/worm hole theory).
Light is an amazing thing. No one knows what the hell it is yet we use it all the time without thinking. We have invented light bulbs and flashlights yet have absolutely no idea what it is. Theories abound but none of them fully encompass its properties.
I firmly believe that when we understand light the rest of the universe will open up to us.
