Photographer Hans Silvester travelled to the remote Omo Valley to capture the striking body art of the local Surma and Mursi tribes. Traditionally nomadic, the tribes decorate the territory of their naked bodies with whatever nature offers - leaves, flowers, grasses, butterfly wings and snail shells - plus the occasional pen top or Kalashnikov cartridge. The spontaneously woven hats and headdresses are part fashion, part trophy display, part protection...