The discovery of an ancient clay face in Pennsylvania is prompting discussion on who made it and what it was for.
The head, which was discovered near Ebbert Spring in Franklin Country, Penn., has shells for eyes and tiny holes across its top and sides that may have been used for
Scientists are looking to unlock the secrets of Serpent Mound in Ohio, the largest prehistoric effigy of its kind in the world.
Nearly a quarter-mile long as measured by the centerline of its curves, Serpent Mound is the largest prehistoric effigy of its kind in the world. It was built on