Well, much as I'm a skeptic as anyone else, aren't we forgetting the fact that we don't understand much about wormholes (if they exist), and it's in these uncharted waters of physics that may lie the answer to interstellar travel?
I don't know anything more than the average layman about this stuff, so I'm happy to be shot down (har har) by a physicist who knows better. I do recall Dr Karl Kruzeniski postulating that the knowledge that comes out of the LHC experiments over the next couple of decades may solve some of these mysteries. He was even suggesting that it may tell us how to lose our mass (thanks to the Higgs Boson), which may facilitate faster than C travel.
Whilst I too am a skeptic, I also know that we don't know everything yet
And for all we know, we're just some big ecological experiment
