I actually remember reading someplace, (don't ask me where. It was like three years ago.) that a mathematician figured it out and at a totally random pace it would take something like 40-60 billion years for a single celled organism to develop. The Earth is only like 4 and half billion years old and there is already an abundance of super complex life forms, like us, here. They determined that an unknown force must have contributed to the fast development of life on earth, but stopped short of saying it was a deity