Tribal Olympians push the boundaries of the possible – in pictures
From the archery range to the pool, the equestrian park to the gymnastics floor, the Olympics showcase a range of physical and mental feats. But the Olympic motto – 'Faster, higher, stronger' – acquires fresh resonance in light of the extraordinary abilities of the world's tribal peoples. How deep can a Bajau pearl-hunter dive? How fast and how far can Mexico's rarámuri run? A collection of photos collated by Survival highlights the attributes of tribespeople whose skills have been shaped by their natural environment