"Since diving is an everyday activity, the Bajau deliberately rupture their eardrums at an early age. "You bleed from your ears and nose, and you have to spend a week lying down because of the dizziness," says Imran Lahassan, of the community of Torosiaje in North Sulawesi, Indonesia. "After that you can dive without pain." Unsurprisingly, most older Bajau are hard of hearing. When diving, they wear hand-carved wooden goggles with glass lenses, hunting with spear guns fashioned from boat timber"