The prehistoric period(선사시대) is the first stage in the history of Korea. Let us explain the meaning of prehistoric times. 선(seon, 先): first, first. 사(sa, 史): history. 시(si, 時): time. 대(dae, 代): generation, era. ⇨ 선사시대(Seon-sa-si-dae) = prehistory Thus, prehistory refers to the period before history was written down. This period can be divided into the 'Stone Age' and the 'Bronze Age' according t..