Mixed Martial Arts (MMA), one of America's most brutal sports, has just got fiercer. Even as heavyweight champion Brock Lesner pushes the sport into dangerously violent territory, it is becoming increasingly popular across Europe, where martial arts specialists deem it closer to a gladiators' show than a sport. Read more...

With moves like "ground-and-pound" and "lay-and-pray", Mixed Martial Arts is considered the most brutal form of contact sport after street fighting. So why are children as young as six getting involved? Read more...