Comment Re:another kind of selection bias (Score 2) 69
But perhaps the set of circumstances that would create an environment that lasted long enough for life to be created and evolve to this point are wildly, vanishingly improbable. Perhaps the only reason we think it should have happened lots of other places is that we are the ones doing the looking, and we don't realize just how rare we actually are.
Note that if the odds were one trillion to one against, then we could reasonably expect 30 BILLION civilzations in the observable Universe.
Of course, those odds only give about one chance in four of there being a technological civilization in any particular large galaxy like this one....