Archibald and Gemini
Archibald T. Williker was an ordinary gent, the sort a dame might give a polite curtsy to on a good day. Nothing out of the ordinary there, not until he came face to face with Gemini, an alien visitor to Earth he named after his own Zodiac sign. Archibald spent days trying to teach the alien about humanity, about its ins and outs, about prohibition, the depression, skirts, and how they came to be. In the end, Gemini rejected all such explanations as irrelevant, and returning to its spaceship eradicated human life as we know it.