I think I'm in #5 - mathematically probable. I guess the law of averages here would also dictate that there's life somwhere else out there. It seems logical to me. I think we have been visited, they may even be walking among us But it's fun to believe this, I have no proof. And since we're in the "off topic" forum if I have to watch one more movie that explains "all the technological advances of the last century like the computer chip and the microwave oven on alien technology that has been reverse engineered" I am going to through the screenwriter to Mars! ha.