The Big Bang theory tells us about strange properties of space itself, that is space could be expanded and that expansion could be faster than light. Now, we don't know really what space is and therefore there's no way for us to manipulate with that strange properties. But if we knew how to do that question is whether we could use it to travel. Space we would use for a start would be a 50 yard cube, large enough to put a spaceship in it, and the point of expansion would be just behind the spaceship!
1./---SPACESHIP OBJECT 1 /
2./-----------------------SPACESHIP OBJECT 1
our space after exp.
Why did the SPACESHIP moved away from the point of expansion? Why galaxies move away from the point of start of the universe? I certainly hope space expansion is the answer to that! As you can see in graph, our space is expanding in a STRAIGHT LINE and STRAIGHT LINE ONLY and NOT AT ALL LATERALLY OR SOMEHOW ELSE!!! As you can also see in graph, the SPACESHIP is now closer to OBJECT 2. But why would "new" space interact with the "old" one as a solid body physically moving it away? It seems funny, right? It would be much more resonable if space behaved like liquid or air, than these two spaces would interact just as an aircraft does when it cuts through the air. However, getting closer to other objects would be possible. Do you agree with me?
Q. Why we should use this to travel?
A. Because space can go much faster than light!