Ethiopia’s Vanishing Tribes

Brent Stirton is a senior staff photographer for Getty Images and a LIFE.com contributor who routinely spends nine months of the year on assignment, all over the world, covering everything from narco-wars in Afghanistan to “fog harvesting” in Nepal. In 2007, Stirton spent two weeks in Ethiopia’s Omo River Valley, documenting tribal groups that still live largely as they have for centuries.