> And FTL travel seems to be impossible otherwise we'd have seen signs of it. What signs? Projects like LIGO that measure gravitational waves are still measuri

> And FTL travel seems to be impossible otherwise we'd have seen signs of it. What signs? Projects like LIGO that measure gravitational waves are still measuring cataclysmic collisions of ultra massive bodies. Maybe once the detector is good enough to detect exoplanets and smaller objects we can start drawing some conclusions. I don’t believe FTL is possible, but on the off chance that it is, we’d be so deep into technology-as-magic territory that any speculation on detectability is totally pointless.