Mixed martial arts (MMA) fighter Rafael dos Anjos poses for a photo during a training session at the Evolve MMA academy in Singapore March 25, 2010. Like gladiators battling in the blood and roar of the Colosseum, dos Anjos believes MMA makes compulsive viewing because it taps into the human survival instinct. To match Interview SPORT-MMA/ REUTERS/Vivek Prakash (SINGAPORE - Tags: - SPORT)