strange story.

[snorsorbet]

space-time has ten dimensions

Isn't that still not proved by experiments?

Anyway, I doubt that you can use more dimensions just because you have a more effective brain. Maybe you can think more logic and babies in their specie know about the theory of relativity, but that doesn't mean that they can move and use more dimensions than us. If that would be possible, "mother nature" would probably have made some animal use it.

The last things I can think of is that we don't know how many very real chances there are that somewhere beyond our ability to scope, some new element still exist. They could be more powerful than 10 solar system combine. If the aliens can use them, light speed is no problem.

What do you mean? LIGHT SPEED? Nonono, I think that you are dreaming away a bit here. Ahem.

the mass of an object increases the faster we get. At the speed of light, our mass would be infinite, and Newton says that you need a certain force to accelerate something.

Oh, and one last thing,

Light has two properties. Some, like bending light, leaves the conclusion that it is a wave, other properties are similar to particles. In this way, light is a strange thing in between wave and particle.

Doesn't matter also have both the properties of particle and wave? For example, an electron's wave function, that allows you to calculate the probablility for an electron to be at certain places around an atom.

If you see that I am wrong, please correct me, because this is something I am really intrested in

EDIT:
@ Lauli line 1: No, not at Half Life 2, even if dad talks alot about it. I think it was some science magazine / documentary, but it could have been on the net too.
@ Lauli line 2: Nah, space is big. It would also take a very long time to travel in space, even if you travel at something almost as fast as the speed of light. They could perhaps find us in a couple of thousand years, though, and see that life exists on earth. But if the had already detected earth, the light when earth started to "live" should have reached them by now. But not travel to this place...