UPPSALA, Sweden — About 100 yards inside one entrance of the Lunsen forest is a rock ledge formed millenniums ago when all of Scandinavia was covered by ice. A thicket of bushes lines the near edge of a gully that drops down 15 feet. On the far edge, a group of trees rises, like fingers splayed wide, providing the false impression that they are not so far away when in fact, a steep fall awaits anyone who steps off the precipice. To the side of the ledge is a medium-size stone.
“So look,” Thierry Gueorgiou said one afternoon, pausing just before the ledge and pointing to a folded map.