Copper smelters once used iron oxide to refine copper, unintentionally advancing the path toward iron metallurgy. Research conducted at Cranfield University provides new insight into the shift from the Bronze Age to the Iron Age, suggesting that copper smelters experimenting with iron-rich rocks may have unintentionally paved the way for the invention of iron. The [...]from SciTechDaily https://ift.tt/fRvsJX1
