Excavations at America's Stonehenge are revealing the incredible history of this ancient site! A shovel test pit excavated next to one of the stone walls on the site showed that centuries of soil accumulation has obscured much of the structures on this property. The stone walls enjoyed by visitors to the Salem, NH museum may appear to be only a couple of feet high, but this recent excavation revealed that as much as half of the wall may be buried underground! What else will we discover in future