It is generally believed that Paleolithic man began to inhabit the Korean Peninsula about 40,000 to 50,000 years ago, although it has yet to be confirmed if they were the ethnic ancestors of present-day Koreans. Some Paleolithic men lived in caves, while others built structures on level ground. They lived on fruit and edible roots and by hunting and fishing. Neolithic man appeared in Korea around 4000 B.C., with signs of their active presence around 3000 B.C. being found across the peninsula. It is believed that the Neolithic people formed the ethnic stock of the Korean people. Neolithic p…