Four of the Omo Valley's most culturally distinct communities in three days — each with a different landscape, a different social structure, and a level of detail most tours never reach. Meet the Mursi, whose women's lip plates carry a precise bride-wealth value: a large plate is worth 60 cattle, a smaller one 40. In Turmi, encounter the Hamar, whose men maintain their clay-and-ostrich-feather hairstyle on a wooden neck-rest called a...