Sad to see ruins of a once great civilization just vanish possibly due to living in a unsustainable environment - five decade drought? You would think they would develop the ability to adapt and move to a fertile and watered area such as north to the San Juan River in Farmington? The architecture evolved over several centuries with influences from the Mexican or even further South American but their art remained basic and there appeared to be no written communication which is a necessity for a community to develop and grow. While other cultures worldwide progressed this one shriveled up and died.
