... common in the East African highlands by 20,000 yearsago, appeared at that date also in southern Africa, spread into western andnorthern Africa during the next 10,000 years, and thereafter became ... goods that enteredMediterranean trade. Their raids extended at least as far southwards as LakeChad. The Garamantian state peaked during the second and third centuries adwhen the Roman colonies ... Nilo-Saharan languages believe that the practitioners ofthis high-rainfall culture kept livestock and cultivated grain. For livestock, thismay be true; excavators at Nabta Playa and Bir Kiseiba,...