The game of football has evolved in many ways, from hitting to the play clocks to turf and grass fields. The play clocks have changed because they were 45 seconds but now they are 40 seconds, usually by the time the referee sets the ball down they have about 25 seconds to snap the ball or it is a delay of game, and that is a 5 yard penalty. Hitting percussions are a big part of football, if you hit someone in the wrong way you can badly injure your opponent. Referees are very strict if you hit the quarterback below the waste, it is a personal foul. Also, if you go head to head with the ball carrier it is a personal foul and usually results in a concussion for one of the two players. Fields have evolved drastically. All of the fields use to
