Life—be it human, plant or animal—doesn’t last long in this scrappy landscape without barbs, armor or a few aces in the hole. Maybe that’s why Albuquerque has perhaps the highest density of professional cage-fighters per capita. Officially called Mixed Martial Arts, the sport’s biggest stage is the Ultimate Fighting Championship. But its best fighters are not confined to the UFC: Smaller promotions like Strikeforce and Bellator have their share as well. Albuquerque is home to fighters in these and just about every other major promotion in the U.S.