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| | American football - Open Encyclopedia (Site not responding. Last check: 2007-10-29) |
 | | American football, known in the United States simply as football, is a competitive team sport that rewards players' speed, agility, skill, tactics, and brute strength as they run and throw a ball, and block, tackle, and outrun each other, trying to force the ball further into their opponent's territory and ultimately into the endzone. |
 | | However, both of these games have their origins in varieties of football played in the United Kingdom in the mid-19th century, and American football is directly descended from rugby football, usually known simply as "Rugby". |
 | | Football is also occasionally used by followers of the sports of Rugby Union, Rugby League, Gaelic Football and Australian Rules Football to refer to their sport. |
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