Phil Tuwaletstiwa

Chaco Canyon, located in northwest New Mexico, is perhaps the only site in the world constructed in an elaborate pattern that mirrors the yearly cycle of the sun and the 19-year cycle of the moon. How did an ancient civilization, with no known written language, arrange its buildings into a virtual celestial calendar, spanning an area roughly the size of Ireland?

Documentary on water usage, money, politics, the transformation of nature, and the growth of the American west, shown on PBS as a four-part miniseries.