Some 7,000 years ago, long knives, bracelets, and other stone objects made by skilled artisans in Paris were delivered to people hundreds of kilometers away via a complex trade network that is now being mapped for the first time. Ta.
Solene Denis of the French National Center for Scientific Research in Nanterre and Michael Kemp of the University of Basel in Switzerland used a combination of archeology and computer modeling to reconstruct the long and winding route people took to supply supplies from what is now Normandy. The road was rebuilt.