Do you believe in alien life - that is life that occurs outside of Earth and didn't come from Earth?
I think that there is a very good possibility that it is out there. 
The Drake equation is a theory that speculates about the existence of intelligent life in the universe - I wonder if they are right.
I do know that the chances we are alone in the universe are slim.  Maybe we will find someone on Mars one day
Since the mid 20th century there has been an ongoing search for signs of alien life - i wonder if they are keeping stuff from us.