- Black Hills (Wikipedia)
The Black Hills is an isolated mountain range rising from the Great Plains of North America in western South Dakota and extending into Wyoming, United States. Black Elk Peak, which rises to 7,242 feet (2,207 m), is the range’s highest summit. The name of the range in Lakota is Pahá Sápa. It encompasses the Black Hills National Forest. It formed as a result of an upwarping of ancient rock, after which the removal of the higher portions of the mountain mass by stream erosion produced the present-day topography. The hills are so called because of their dark appearance from a distance, as they are covered in evergreen trees.
- Paleolithic (Wikipedia)
The Paleolithic or Palaeolithic (/ˌpeɪ-, ˌpælioʊˈlɪθɪk/ PAY-, PAL-ee-oh-LITH-ik), also called the Old Stone Age (from Greek: παλαιός palaios, “old” and λίθος lithos, “stone”), is a period in human prehistory that is distinguished by the original development of stone tools, and which represents almost the entire period of human prehistoric technology. It extends from the earliest known use of stone tools by hominins, c. 3.3 million years ago, to the end of the Pleistocene, c. 11,650 cal BP.