Nobel Media AB
The Nobel Prize: Iron, Steel, and Invar
Read about the history of iron use and the many applications of steel in modern life. Learn about how iron is extracted from ore, how steel is made, and the invention of invar, an iron-nickel alloy, by physicist Charles Edouard Guillaume.
National Earth Science Teachers Association
Nesta: Windows to the Universe: Iron Ore Deposits
This concise article, which is provided by Windows to the Universe, explains how iron and iron ore were formed billions of years ago.