- Jimmy Nelson photographed 35 tribes all over the world for book "'Before They Pass Away"
- Nelson photographed tribes in Ethiopia, Kenya, Tanzania and Namibia
- He wanted to create a record of "a fast disappearing world"
(CNN)As teenagers, the women of the Ethiopian Mursi tribe pierce their lower lips and put a clay plate in it. They are one of the last tribes in the world who still practice this tradition and the new generation, influenced by the outside world, might decide to abandon it.