The missionaries came out of the planetary system of a star they didn't call Antares. They called it, naturally enough, The Sun—just as home was Earth, Terra, or simply The World. And naturally enough, being the ascendant animal on Earth, they called themselves human beings. They were looking for extraterrestrial souls to save. They had no real hope of finding humans like themselves in this wonderously diversified universe. But it wasn't against all probability that, in their rumaging, there mig