National Geographic - Naked Science - Who Built Stonehenge

Stonehenge - England's most mysterious ancient monument, standing on a site older than the Pyramids of Egypt. But who built it and how? We know that some of the rocks were brought to Stonehenge from more than 200 miles away, across England's biggest tidal estuary. Using a three-dimensional computer model, facial anthropologists examine human skeletons which have been found near Stonehenge - watch as they recreate the face of a man who may have worked on the construction of this enigmatic ancient structure.