Well this article/study talks about the likelihood by looking at the likelihood that an RNA sequence randomly forms long enough enough number of times until a s

Well this article/study talks about the likelihood by looking at the likelihood that an RNA sequence randomly forms long enough enough number of times until a self replicating sequence exists. Such a probabilistic approach indicates that life, while not necessarily rare in the universe, might be rare enough that it is unlikely for it to occur twice in a volume that is observable from one occurrence, or that there is some unknown mechanism that makes it more likely.