It's said that roulette was invented while searching for the perpetual motion machine, and the endless wheel spin could make that seem believable! Learn what makes the European version unique from its American Cousin. A ball spins within a wheel with 36 numbered black and red slots, along with green 0, in the non-consequential order. Players should predict the number or color on which the ball will land by placing bets on the corresponding fields on the unique game table. European roulette has t