Mesa Verde means green table - refers to mountains; Ancestral Puebloans lived in the MV for about 850 years (450-1300 C.E); 500-1300 CE, Ancestral Puebloans were mainly sedentary farmers; Exact reasoning for the cliff dwellings is unknown, possibly provided protection from invaders, snow, and provided shade. There could also have been a ceremonial or spiritual reasoning; Abandoned around 1300 CE probably due to drought, lack of resources, or violence