Portal:Mining/Did you know/5
- ... that the Mir diamond mine (pictured) is so large that its natural downward air flow can crash helicopters?
- ... that plug and feather, still used today, was the method used by the Egyptians to cut stone?
- ... that the historic Samson Pit silver mine in the Harz Mountains of Germany was, for a long time, the deepest mine in the world?
- ...that on April 29, 1899, trade unionists in Coeur d'Alene, Idaho killed two men by steering an explosives-laden train to the site of a mill, in order to protest the firing of fellow union members?