Why Iron Took Humanity Thousands of Years to Figure Out

Iron makes up about five percent of the Earth's crust, so why did humanity use copper and bronze for thousands of years before mastering it? In this episode, we rebuild ironmaking from scratch: the first iron that fell from the sky, why iron ore is so hard to break apart, how ancient bloomery furnaces made iron without ever melting it, why early iron was actually worse than bronze, and how steel, quenching and tempering turned it into the metal that built the modern world. Furnaces and glowing metal are dangerous. This video is a history lesson, not a tutorial to try at home. Previous episode: How to Make Glass From Sand and Fire (From Scratch) LINK_DO_EP2 Subscribe to follow the journey from zero to civilization, one invention at a time. Chapters: 0:00 Iron is everywhere. So why so late? 0:34 The first iron fell from the sky 1:09 Why iron is so hard to get 1:54 The bloomery furnace 2:47 Plot twist: iron was worse than bronze 3:27 The secret of steel 4:03 From ancient China to two billion tonnes 4:40 Recap and what's next #iron #history #howthingsaremade #science #civilizationIron makes up about five percent of the Earth's crust, so why did humanity use copper and bronze for thousands of years before mastering it? In this episode, we rebuild ironmaking from scratch: the first iron that fell from the sky, why iron ore is so hard to break apart, how ancient bloomery furnaces made iron without ever melting it, why early iron was actually worse than bronze, and how steel, quenching and tempering turned it into the metal that built the modern world. Furnaces and glowing metal are dangerous. This video is a history lesson, not a tutorial to try at home. Previous episode: How to Make Glass From Sand and Fire (From Scratch) LINK_DO_EP2 Subscribe to follow the journey from zero to civilization, one invention at a time. Chapters: 0:00 Iron is everywhere. So why so late? 0:34 The first iron fell from the sky 1:09 Why iron is so hard to get 1:54 The bloomery furnace 2:47 Plot twist: iron was worse than bronze 3:27 The secret of steel 4:03 From ancient China to two billion tonnes 4:40 Recap and what's next #iron #history #howthingsaremade #science #civilization