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<span>In southern France, the Carcassonne gap is an ancient routeway leading from the Atlantic to the Mediterranean lands. Carcassonne is located southeast of Toulouse (about 90km) in the middle of the Massif Central and Pyrenees in France. It is situated in the intersection of the two main routes of traffic: the route that goes from the Massif Central to Spain and the route going from the Atlantic to the Mediterranean lands. </span>
A result of humans' increased dependence on the land and fears of scarcity—to a decline in nutrition and a rise in infectious diseases
