Paleoanthropologists (scientists who study fossil remains of ancient peoples) speculate that a group called Paleo-Indians migrated to the Western Hemisphere (North and South America and the surrounding waters) from Asia during two periods: the first, between 50,000 and 40,000 B.C.; and the second, between 26,000 and 8,000 B.C. Scholars believe that during the Pleistocene glacial epoch (the late Ice Age, which ended about 10,000 B.C.) a natural bridge over the present-day Bering Strait connected North America (Alaska) and Asia (Russia). It was over this bridge that the first people were able to migrate. After their arrival the Paleo-Indians moved throughout North and South America. By 8,000 B.C. primitive hunters were living in Tierra del Fuego, which forms the southernmost part of South America.
Further Information: Hirst, K. Kris, ed. Archaeology. [Online] Available http://archaeology.about.com, October 22, 2000; The Paleoindian Period. [Online] Available http://www.cv.nps/gov/seac/paleoind.htm, October 22, 2000; Paleo Indians. [Online] Available http://www.wvculture.org/shpo/paleo.html, October 22, 2000.