There probably is some variety of alien life out there.
For perspective:
There are 9 known planets orbiting our Star.
There are somewhere between 200,000,000,000 and 400,000,000,000 Stars in the Milky Way.
There are an estimated 100,000,000,000 galaxies, minimum, in observable space.
If the Solar System and Milky Way numbers are both used as approximate averages (not TOO unreasonable), we're left with an approximate MINIMUM of 200,000,000,000,000,000,000,000 planets in the observable universe.
I do not believe it likely that intelligent life will have appeared on only one of these in the last ~14 billion years.
Note that this ignores non-planetary bodies of mass, which could also, if bound to a star, theoretically support life.
For perspective:
There are 9 known planets orbiting our Star.
There are somewhere between 200,000,000,000 and 400,000,000,000 Stars in the Milky Way.
There are an estimated 100,000,000,000 galaxies, minimum, in observable space.
If the Solar System and Milky Way numbers are both used as approximate averages (not TOO unreasonable), we're left with an approximate MINIMUM of 200,000,000,000,000,000,000,000 planets in the observable universe.
I do not believe it likely that intelligent life will have appeared on only one of these in the last ~14 billion years.
Note that this ignores non-planetary bodies of mass, which could also, if bound to a star, theoretically support life.