Basketball is a sport played with a leather ball and two baskets. It involves dribbling, running, passing, shooting, and jumping. Dr. James Naismith invented basketball in 1891 in Massachusetts, creating the game for indoor winter play using a soccer ball and peach baskets as goals. The rules include violations, fouls of different types, and referee signals. Points are scored by shooting inside and outside the three-point arc as well as through free throws. Court dimensions vary by competition level, from high school to college to professional. Famous NBA players who excel at the game include Michael Jordan, Wilt Chamberlain, and Magic Johnson.