Every 238 years, the orbits of Neptune and Pluto change making Neptune at times the farthest planet from the sun.

In 1978, the World Water Speed record was made by Ken Warby from Australia. His average speed was 317.6 mph, and his jet-powered hydroplane was 27 feet long called "Spirit of Australia." Warby built the boat himself in his back yard.

Mark Twain didn't graduate from elementary school.

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