The only major football-type sport that does not appear to have developed from the medieval game is Australian football. Probably an outgrowth of earlier Aboriginal games, it is played on an oval field that is about 200 yd (183 m) long and 150 yd (137 m) wide across the middle. Each team, composed of 19 players, attempts to kick the egg-shaped ball past a set of goal posts. The ball may be advanced by punches, kicks, or dribbles. The game, played only in Australia, is especially popular in the southern and western parts of the continent.