On Friday, January 26, at 1 p.m., Chelsea Fisher will present her dissertation defense. She will discuss her research at the archaeological site of Tzacauil in Yucatán, Mexico. Fisher examines Tzacauil’s landscape as an ongoing record of Maya farmers’ changing relationships with their local environment, beginning with the Formative period transition to agriculture (ca. 2000 years ago) and continuing into the twenty-first century. Through archaeological investigations and work with modern farmers and gardeners, Fisher explores the role of small farming communities in the larger historical dynamics of sustainability in the Maya area. The talk is at 1 p.m. in Room 2334, School of Education Building, 610 E. University Avenue.