UFC is also safer than boxing because of the tap-out rule. I'll give you an example: when Roberto Duran said, 'No mas' (meaning 'no more' in Spanish) because he couldn't continue and knew he was hurt, he was ridiculed the rest of his career. In UFC, a fighter can tap out if he's in a dangerous position or believes he's going to be seriously injured.
Dana White and the future of UFC (2004)