Anna Sofaer rediscoverd the now-famous “Sun Dagger” petroglyph site on a desert butte high above Chaco Culture National Historical Park in New Mexico at Summer Solstice in 1977. In 1978, she founded the non-profit Solstice Project, through which she has contributed 35 years of research into the meaning of ancient Chaco’s astronomical expressions. Sofaer and the highly qualified science team of the Solstice Project struggled to overcome resistance to their findings by an entrenched archaeological establishment. As deeper investigations provided more and more substance to her findings, Sofaer now stands tall as one of the great pioneers of American archaeoastronomy. The Solstice Project’s film The Mystery of Chaco Canyon, narrated by Robert Redford, has been broadcast across the country on PBS stations since 2000. Her nine research papers are also on the solstice project website.