Wasn't there something in the news about tachyons at CERN recently? I guess if you detected one that would be an indication Einstein missed something. Quantum entanglement over a large distance might be a candidate. The current Cosmological model has some serious problems like dark matter and dark energy being undetectable. I don't see how an object wouldn't continue to accelerate after passing through the event horizon of a black hole. Is the escape velocity of a black hole C at the event horizon? Making any predictions based on my idea would be difficult and would take some time. Thanks for listening.