I've read and watched some interesting stuff lately that has a direct bearing on all the UFO stuff. This includes some videos by deGrasse, a summation of a paper by Einstein and Rosen, and a few other things about the likelihood of us being alone in the universe and the problems with interstellar travel.
A lot of this addresses the Fermi Paradox. While certainly not conclusive, some recent studies suggest that we might actually be one of the first (if not only) advanced civilizations in the galaxy. A couple of interesting videos about the problems with interstellar travel also discuss some major issues with traveling interstellar distances. As appealing and amazing as wormholes, warp drive, hyperdrive, and other such technologies are in books and movies, the fact is that ALL known laws of physics and ALL observations say getting from any point to another faster than the speed of light is an absolute, 100% impossibility, despite what happens in the movies. Any other slower than the speed of light travel is impractical time wise and also runs into some MAJOR problems with mass, acceleration, hitting dust particles, friction with interstellar gas, radiation, and etc. that may not be just a matter of solving with advanced technology.
Forget wormholes. Einstein-Rosen bridges, the actual name for them, are theoretically possible, but all their equations and all the research done since says that even if you could go into one (and they're extremely narrow), you can't come back out at either end. Period.
In other words, there's a good chance that there may well be other advanced civilizations out there (I believe there likely are), but they may not be any more advanced than us, or even if they are, the problems involved with interstellar travel are too great to overcome.