National Geographic : 1977 Mar
the depression, which could take 50 years to fill. Siwa Oasis (below left) was old when Alexander the Great consulted an oracle here in 331 B.C. Growers of dates and olives, herders of sheep and goats, some of the 5,000 inhabitants are abandon ing these mud-brick dwellings for government built concrete homes. A woman of the Oulad Ali tribe (below) lives on the western edgeof the oasis.