Nancy Fried Foster was an anthropologist hired by University of Rochester's library to study its undergraduates, to help shed light on how they do their research and write papers, and how they spend their days. The results of the study helped guide a library renovation, influenced a Web-site redesign, led to changes in the way the library markets itself to students, and in some cases, completely changed the image of undergraduates in the eyes of the Rochester librarians. This article describes how Foster's work has shattered faculty and staff beliefs about undergraduates.