The Sahara is the quintessence of isolation, epitomizing both remoteness and severity of environment unlike any other place on the face of the earth. Replete with myths and fictions, it is a wild land, dotted with oases and camel trains trudging through sand dunes that roll like the waves on a sea, as far as the distant horizon. But this is just part of the picture. The largest desert in the world, the Sahara ranges from the river Nile running through Egypt and Sudan in the east, to the Atlantic coast from Morocco to Mauritania in the west; stretching from the Atlas Mountains and the shores...