Mining is one of the key endeavors that provides basic resources for modern civilization. The history of mining parallels the history of civilization, with important eras associated with minerals like the Stone Age, Bronze Age, Iron Age, and Steel Age. Mining engineering involves applying engineering principles to develop, plan, operate, close, and reclaim mines. Key terminology includes mine, mining, ore, gangue, waste, and metallic vs non-metallic minerals. The life of a mine involves several stages from exploration and development to extraction and beneficiation, and finally closure and reclamation.