Folkton Drums (© Trustees of the British Museum)
More than a decade ago, archaeologists Andrew Chamberlain of the University of Manchester and Mike Parker Pearson of University College London began taking measurements at Stonehenge as part of their research at the site. They determined that the Neolithic monument’s earthwork elements—including a ditch, a bank, and a ring of chalk pits—which form concentric circles around the iconic standing stones, all feature diameters evenly divisib