Bowling ball random when impacting a full rack of pins on the first delivery of a frame, and sometimes when hitting downed "dead wood" pins on subsequent deliveries—the candlepin bowling sport is the only major one that allows fallen pins, provided no part of any fallen pin extends more than 24 inches (61 cm) forward of the head-pin spot, to remain on the lane's pindeck to be used in knocking down more pins with the next ball delivery in the same round—up to three balls are delivered, much as in duckpins, in each round of candlepins for one bowler. Bowling ball A
Ten-pin bowling ten-pin bowling (a modern version of the game of skittles) has risen in popularity as its technology has improved. The sport is most popular in the United Kingdom and the United States. Both nations maintain national regulatory organizations that govern the sport's rules and conduct, and many of those countries' best players participate in tournaments on both the national and international stage. Because of the rise in popularity, many companies began making bowling balls and apparel for professionals as well as for recreational bowlers. Bowling has also become more prevalent in the media in recent years, with the continued popularity