Things about Earth what are the fastest: "There is something that is part of human nature that makes us want to go fast. Something that even small children feel that makes them want to go faster. It brings to mind something that happened this summer. We were tubing behind the boat and my 3 year old grand daughter wanted to try. She got on the tube with her dad. We were going at about 15 mph when her dad lost his balance and the tube flipped over on its side, he fell off."
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