Bronze and Iron AgesTechnology Iron Age begins c. 1,200 BCETurning point Ironworking spreads widely. Iron ore is common, so metal tools and weapons become far cheaper. ▲ MattersSaveShareTrace roots Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear → Asteroid ends the dinosaurs → Early primates → Apes split from monkeys → Human line splits from chimpanzees → Walking upright → First stone tools → Genus Homo appears → Homo erectus → Control of fire → First fired clay figures → First pottery → Potter's wheel → The wheel → Spoke-wheeled chariot → Hittite Empire → Iron Age begins Community notesLoading notes… Learn more ranked by votesDocumentbritannica.comIron Age (Britannica) ↗Editor's pickBookTheodore A. Wertime and James D. Muhly (eds.)The Coming of the Age of Iron ↗Editor's pickVideoSearch on YouTubeIron Age ironworking history ↗Editor's pick