Vincent Grafhorst / Salt flat, Lake Asale, Danakil Depression, Ethiopia

Vincent Grafhorst / Lave field, Erta Ale, Danakil Depression, Ethiopia

Vincent Grafhorst / Tourists on crater rim of active volcanic crater, Danakil Depression, Ethiopia

Vincent Grafhorst / Lava inside volcanic crater at night, Erta Ale, Danakil Depression, Ethiopia

Vincent Grafhorst / Smoke from volcanic crater at night, Erta Ale, Danakil Depression, Ethiopia

Vincent Grafhorst / Salt flat, Lake Asale, Danakil Depression, Ethiopia

Thomas Marent / Gelada Baboon (Theropithecus gelada) juveniles fighting, Simien Mountains National Park, Ethiopia

Thomas Marent / Gelada Baboon (Theropithecus gelada) juvenile feeding, Simien Mountains National Park, Ethiopia

Thomas Marent / Gelada Baboon (Theropithecus gelada) juveniles play-fighting, Simien Mountains National Park, Ethiopia

Thomas Marent / Gelada Baboon (Theropithecus gelada) juveniles play-fighting, Simien Mountains National Park, Ethiopia

Thomas Marent / Gelada Baboon (Theropithecus gelada) juveniles play-fighting, Simien Mountains National Park, Ethiopia

Ingo Arndt / Gelada Baboon (Theropithecus gelada) juveniles, playing, Simien Mountains, Ethiopia