The large body of scientific literature on biological rhythms calls for systematic academic historical study. This conference aims to encourage research in this area by bringing together historians, philosophers, and chronobiologists who are interested in reflecting on biological rhythm studies in a multidisciplinary historical framework. The conference takes place at the University of Minnesota, 11-12 May 2012. Deadline for proposals: 15 October 2011 (with a response by 1 November). Address inquiries to Jole Shackelford (shack001@umn.edu; 612-624-4499). For more information, see: www.umn.edu/history/home.html