The practice of identifying baseball players by number was started by the Yankees in 1929.
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Babe Ruth wore No. 3 because he batted third.
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Most NASCAR Teams use nitrogen in their tires instead of air.
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Basketball great Wilt Chamberlain never fouled out of a game.
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In England, there's a phenomenon called the "half-time kettle effect" where power use surges at half-time during England's matches in the World Cup as everyone turns on their tea kettles at the same time.
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During WWII, because a lot of players were called to duty, the Pittsburgh Steelers and Philadelphia Eagles combined to become The Steagles.
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There is a sport called Banzai Skydiving. You throw the parachute out of the airplane first and then jump after it.
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