How long would it take a space colony of 100 modern-day people, 50/50 m/f, to reach a 50 million population? Would there be rules for procreation? What about in vitro fertilization? Inbreeding? All humans are dead, except for the 100. All of them are scientist educated types. All men are virile and all women are fertile. The goal of the colony is to repopulate humanity.