Courtesy Reuters

THE Sahara, comparable in size to the United States, is essentially a land of minerals. Plants, animals and men, all live there artificially. The vast spaces, the heat, the lack of water and vegetation have combined over the centuries to make it a desert and a virtually impassable obstacle dividing Mediterranean civilizations from the people of Black Africa. Today, however, modern techniques have enabled men to transform what was a natural barrier into an economic and social link between Europe and Africa. Why, how and by whom has this historic revolution been accomplished? My object here is to try to

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