I wonder if there is any way to statically guess the number of planets in the Goldilocks zone, the approximate distance from a star for liquid water to be possible. That would be a very interesting number but I'll just throw out a guess there will be more than one. It's remarkable to think of all the possible life that could be out there. We are probably destend to never meet, but it's interesting nonetheless. I think one of the greatest things finding life elsewhere would accomplish if it ever were to happen, is to study evolution on a completely different scale. The diversity on Earth alone is remarkable, to think what an entirely different planet might produce makes my imagination go wild.