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From a ritual war game to a nomadic hunting tradition, tests of bravery, skill and strength are fueled by the needs for food, survival and glory.
No pain, no gain: A marathon in the desert, bullfighting, a brutal bicycle race and ice swimming push people to the brink, mentally and physically.
Young men in Madagascar grapple with a zebu to enter adulthood as boys elsewhere try to master Kung Fu, sumo wrestling and reindeer racing.