9. Mark Twain and Halley’s Comet

Mark Twain once joked that he “came in with Halley’s Comet” and expected to “go out with it” too; and amazingly, he passed away just one day after the comet reached its closest point to the sun in 1910. Born the same year Halley’s Comet last appeared, Twain’s life seemed mysteriously linked to this cosmic visitor. His witty prediction and the timing of his death make their connection one of the most unforgettable coincidences in history.