AllMovie

Narrated by Robert Redford, with commentary by Joseph Campbell, this documentary examines an archaeological prize from Chaco Canyon in New Mexico: a thousand-year-old, astronomically based calendar created by the Anasazi Indians. The program profiles scientific explanations for how the calendar was used by the Anasazi, whose culture possessed no written language, yet allowed them to thrive in the southwestern United States for two thousand years before inexplicably abandoning their complex, mortarless stone cities in the century and a half prior to the arrival of the Spanish.