A chemical fingerprint taken of Stonehenge’s Altar Stone reveals that it isn’t from Wales, as was previously understood. Instead, researchers believe that the stone came from the Orcadian Basin in Scotland—roughly 466 miles away from the Stonehenge site. While upending previous research, the find also raises questions about how trade networks may have helped transport the stone to the site. The stones of Stonehenge feature a variety of compositions and originate from a number of potential source locations. Recent geological research had pinpointed the source of the stone to the Brecon Beacons area of southeast Wales.