Lack of water availability could come back to southwestern U.S.

A millennium back, in the dry climate of the southwestern US, the culture of Chacoan flourished. The forefathers of the southwest Native Americans these days, Chacoans constructed huge buildings with a long-reaching trading connection being able to sell colorful macaws for opaque gems. But due to the lack of water available, it resulted in the advanced culture to seemingly disappear within a generation. It is described in some new results o....