[Makinus]

If you think the lightspeed thing is crazy, think abut this:

If a person i traveling to, say, 2/3 light speed in a direction, and another person is traveling at the same speed (2/3 lightspeed) at the opposite direction, the logic says tha one traveler would see the other travelling at a speed of 4/3 lightspeed in relation with himself, right?

Wrong.

According to the classical theory, no object can travel at greater relative speed from another object that the speed of light.

This is the major flaw in the classical theory of physics, and one of the most striking hints that the faster-than-light speeds is theoreticaly possible...

One real example of faster-than-light relative speed among objects is the light itself, where a light particle (i know that we are still discussing if light is a wave or a particle, but for the sake of this post lets consider it a particle) traveling at the opposite direction of another light particle is with relative speed in relation to the other particle of 2 times the lightspeed.

Quantum physics (that, according to some scientists, only hald a dozen people in the entire world really understant) have several unresolved manifestations that could be only explained with faster-than-light speeds (or at least communication) among particles.

All this that i spoke here have a very long and complicated mathematical representation (that i, myself, don't hope to understand), but the end point is: there are still flaws in the classical physics theory, and one of these flaws might (just might, it's not a proven fact) allow theoreticaly faster-than-light speeds.