A seductive thought, but without knowing the probability for life, this question simply has no answer. We only know that 0<p_life<1, so maybe the probability is

A seductive thought, but without knowing the probability for life, this question simply has no answer. We only know that 0<p_life<1, so maybe the probability is even more unimaginably smaller than the number of galaxies is large. It could be 10^-50, who knows.