Physicists and Archaeologists Tussle Over Long-Lost Lead

Roman mosaic from the 2nd century AD of a ship displaying similar hull shape to the Madrague de Giens wreck. Image credit: via wikipedia | ://bit.ly/19mo34m, Rights information: ://bit.ly/1lavRWo A confrontation among ancient and modern studies is pitting particle physicists seeking concrete evidence of dark matter against marine archaeologists intent on preserving material in centuries-old shipwrecks. The source of the issue: samples of lead used for anchors and ballast in Roman ships that were...