The Anasazi people of the American Southwest who lived in the region are the
ancestors of modern Pueblo Indians.From about 2000 B.C. to 1000 B.C., they
made a transition from a nomadic hunter-gatherer existence to establish
settlements and early agricultural efforts,

<A HREF="http://dailynews.yahoo.com/h/nm/20011004/sc/science_stalagmites_dc_1.html">Click here: Climate Drove Southwest Native Cultural Changes</A>