The important point is that since the origin of life belongs to the category of at-least-once phenomena, time is on its side. However improbable we regard this event, or any of the steps it involves, given enough time, it will almost certainly happen at least once. And for life as we know it, with its capability for growth and reproduction, once may be enough. Time is the hero of the plot … Given so much time, the impossible becomes possible, the possible becomes probable, the probable becomes virtually certain. One only has to wait; time itself performs miracles.