Why havent the aliens tried to contact us?
Well who is to say there is an alien race advanced enough to do so. Who is to say that we are significant enough in the universe to warrant any
attention. I do find it highly unlikely that there would be no other life in the universe than on earth. But I also find it unlikely that the life
forms would be much more advanced than us, if there were even life forms equally advanced as us. Furthermore, the universe is enormous. It is much
bigger than any of us can comprehend. That makes it extrememly difficult to believe that life in the universe is close by. Even if it were as close
as, lets say the nearest star. Thats light years away. why waste the time going somewhere thats going to be gone in short order (as far as the
universe is concerned).