Lacrosse is a team sport of Native American origin that involves using a crosse to play with a small rubber ball, and it has evolved from 12th-century ceremonial games to modern organized competitions in Canada and the United States. The game is played by ten players per team, with specific positions and rules regarding gameplay, and includes championships for various age and gender levels, particularly dominated by the U.S. and Canada. The 2010 FIL World Lacrosse Championships will feature 30 nations and take place at Manchester University Sports Grounds.