SICHUAN PROVINCE, CHINA—According to a Phys.org report, Haichao Li of Sichuan University led a team of researchers in the analysis of fragments of iron discovered in southwestern China at the Sanxingdui site, a city occupied between 2800 and 600 B.C. So far, eight sacrificial pits containing metal objects such as bronze masks, trees, and figurines have been excavated at the site. The three iron fragments, which appear to have been parts of an ax-like weapon, were discovered in Pit 7. Because this object was found in the sacrificial area, the researchers suggest that it had ritual significance. Metallographic and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analysis of the metal...