Football, also known as soccer, is the world's most popular sport played by over 250 million players internationally. The objective is to score goals by getting the ball into the opposing team's net using any body part except hands or arms. The game is played between two teams of 11 players on a rectangular field with goals at each end. Football has its origins in rule developments in England in the mid-19th century and its international governing body FIFA oversees competitions including the World Cup held every four years.