This program tells the rich and complex story of one of the most astonishing alterations of nature in human history: the transformation - in the space of a single lifetime - of the tallgrass prairie of North America into farmland. The drastic change in the landscape also brought about enormous social change for Native Americans. This film - which interweaves cinematography of prairie remnants, an original score and archival images - highlights prairie preservation efforts and explores how the tallgrass prairie ecosystem may serve as a model for a sustainable agriculture of the future.

Tuesday, 11/6/07 from 4:30-5:30 a.m. ET