This History Channel video is a fascinating account of current scientific work on the origin of Native Americans.  The first 20 minutes can stand on its own as a solid overview of the main theories.  The rest of the video takes viewers to recent archeological digs in North and South America that are opening new questions and suggesting possible new explanations.  Running time is about 50 minutes.  $24.95 for the VHS tape.

   Available from the on-line History Channel store at:

www.historychannel.com