Three Thousand Years in Africa: Man and His Environment in the Lake Chad Region of NigeriaThe Lake Chad region of Nigeria is an extreme environment: virtually treeless sand and a broiling clay plain in the fierce heat of the dry season, then much of it inundated and impassable in the wet season as whole areas turn into shallow lakes or marsh. Yet even this hostile landscape and climate have sustained human communities in continuous occupation for some three hundred years. Professor Connah traces the story of human adaptation to and