In this paper, Margaret Marino of the New Mexico Museum of Natural History discusses methodology and findings of an extensive summative evaluation of the "Horse Tales--An Evolutionary Odyssey" exhibit. This permanent exhibition on the history, biomechanics and importance of the horse in the southwest premiered at the New Mexico Museum of Natural History before it was moved to the new Anne C. Stradling Museum of the Horse in Ruidoso, New Mexico. The appendix of this paper includes the observation forms and visitor survey used in the study.