Around A.D. 1250, seeking refuge from some unknown threat, the Anasazi migrated from open villages to nearly inaccessible dwellings ... along the Rio Grande, in New Mexico, and in northern ...

Consider this ancient ear of maize, which Walter Hough pulled out of a New Mexico ... were the Anasazi (as the ancestral Pueblo were then known), who built cliff dwellings in Mesa Verde, 225 ...