Around 7000 years ago, long knives, jade bracelets, and other stone goods fashioned by skilled Parisian crafters were reaching people hundreds of kilometres away, via complex trade networks that are now being mapped for the first time.
By combining archaeology with computer modelling, Solène Denis at the French National Centre for Scientific Research, in Nanterre, and Michael Kempf at the University of Basel, in Switzerland, have reconstructed the lengthy and winding paths taken to supply people from modern Normandy to…