The speed of light and discovering

[Mister Agenda]

According to what we currently know about the laws of physics, there doesn't seem to be a feasible way to break the speed-of-light barrier.

Quantum Entanglement - if you look at how causality plays out in Quantum Field Theory (that's currently the best experimentally secured description of quantum physics which also takes into account relativity), yes, there's this spooky action at a distance thing. But if you write down the mathematical formula for a communication at superluminal speeds, you find that the spooky particles and the spooky antiparticles exactly cancel each other out and you get zero; It's a famous textbook example, it's in my book as well - nature makes sure that no information can be transported until enough time has passed - as soon as enough time has elapsed, the quantum formula returns a number different from zero and communication is possible. It's the strangest thing, as if the universe had built-in machinery set up to hide superluminal messages from us.

On the plus side, that sounds like it could still be a basis for very long-distance reliable communication, just not FTL communication.