““Halley's Comet is visible from Earth every 75 or 76 years. Twain was born shortly after the comet was visible in 1835. He made the prediction in 1909: “I came in with Halley's Comet in 1835. It is coming again next year, and I expect to go out with it. It will be the greatest disappointment of my life if I don't go out with Halley's Comet. The Almighty has said, no doubt: ‘Now here are these two unaccountable freaks; they came in together, they must go out together.’” He was right: he died of a heart attack just as Halley's Comet was again visible on April 21, 1910. He was 74 years old.””
