The Iron Age was one of the most significant epochs in human history, and researchers may have uncovered the secrets of how we left the Bronze Age behind – via a 3,000-year-old smelting workshop called Kvemo Bolnisi, in southern Georgia. This is a site that's been pored over before, but anthropological archaeologists Nathaniel Erb-Satullo and Bobbi Klymchuk, from Cranfield University in the UK, wanted to take a fresh look at the evidence. The place was previously thought to have produced iron,