Philippe Dudouit Sun-scorched and wind-scoured, the place that geographers refer to as the Sahara-Sahel stretches across Africa between the desert and the great savanna. Though dozens of tribes ...

Sahara Desert, Once Lush and Green, Was Home to Mysterious Human Lineage By Will Dunham (Reuters) -The Sahara Desert is one of Earth's most arid and desolate places, stretching across a swathe of ...