A unique program featuring historians, authors, artists, poets, archaeologists and photographers will be held at the University of Å·ÃÀ¿Ú±¬ÊÓƵ at Boulder on Feb. 26 to probe the meanings of Native American prehistory to different groups of Americans. Titled "Chaco, Mesa Verde and the Confrontation with Time," the panel discussion will be held from 7 p.m. to 9 p.m. in the Old Main Chapel on campus. Co-sponsored by Å·ÃÀ¿Ú±¬ÊÓƵ-BoulderÂ’s Center of the American West, the Å·ÃÀ¿Ú±¬ÊÓƵ Museum and the National Park Service, the program is free and open to the public.