A particularly bright primate came up with relativity theory which, so far, holds unchallenged that nothing can travel faster than the speed of light (c) and there are practical limitations to what speeds matter can attain......
Yes, that is our current understanding of the laws of physics ATM. That doesn't mean that there aren't as yet undiscovered loopholes. As MS just eloquently stated, relativity isn't the be-all\end-all of physics research and it might be possible for the light barrier to be circumvented. Have you ever followed any of the more current Star Trek series' at all? They at least give us a clue about what MIGHT be possible...
V665