Mexico is the birthplace of great fighters, and seedlings of many champions who left a mark on sports history, both professionally and amateur. Mexico is the second world power in boxing, and throughout its history has had 116 world champions, when others have 18, like Canada. Mexico has excelled in the lighter weights, perhaps because the physical nature of Mexico. Boxing In Mexico, things that were formerly allowed at present no longer. For example, the use of ammonia to awaken a boxer knocked down, pitching the towel into the ring to deliver the fight when he was lost (hence the phrase "give up"), did not stop fighting if the boxer was being beaten to excess, but the referee insisted that he would show, urging him to fight instead of stopping the fight, the fights were a maximum of 12 rounds and championship 15. [ame]http://www.youtube.com/watch?v=5bGNnMxtCt8[/ame]