Whats so confusing, the mathmatical odds of only one world in a the universe, to have life on it is not only imposssible, but improbable. Now I wont go the way of the area 51 nuts, but with the amount of distance compaired to time, no being made organic matter could survive the trip from one inhabited planet to the other.
Even at the speed of light it would take 3500 light years to get to the nearest known planet, I dont know about you but that is a long trip just to find out if anyones home, not to mention gas is expensive.

