ALIENS

I have heard recently that there was a new planet found that was much like ours. I have also read a few articles about what Stephen Hawking has been saying lately. Apparently he has a new documentary coming out in which he states that aliens are almost certain to exist, and that if we were to contact them.. we shouldn't. I mean, that guy knows his stuff. I have always been interested in space exploration and anything involving astronomy and what not, but reading things like this freaks me out. It's neat that there's another planet like ours out there, but if there are aliens floating around, how about they wait until I die before they take over the world? Scaaary.