Boy, send a male and female astronaut to Mars, and next thing you know they'll be hiding behind the land rover fornicating like rabbits. It's just what humans do, says a new study in the Journal of Cosmology. It examines the potentially dangerous medical and social repercussions of sex between astronauts, pregnancy, and "the first baby to be born on the Red Planet." If NASA wants to avoid all this, especially on the long trip to get there, "recommendations include the possibility that male and female astronauts on a mission to Mars should fly in separate space craft."