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 North Africa that spans parts of 11 countries and covers an area comparable to China or the United States. But it has not always been so inhospitable. During a period from about 14,500 to…