The document discusses the origins and early history of Korea. It describes evidence of early humans dating back 400,000 years and the development of pottery styles between 6000-2000 BCE. The Bronze and Iron Ages introduced new technologies from China. Significant archaeological sites from 100 BCE include megalithic dolmens that indicate social stratification. The document also summarizes the Tangun founding myth, where the bear-woman gave birth to Tangun, who established the first Korean state of Old Joseon in 2333 BCE.