Social Sciences Forum Wednesday, April 8 | 4:00 p.m. Elizabeth Fenn, Professor of History at the University of Colorado, Boulder Albin O. Kuhn Library Gallery Elizabeth Fenn’s lecture tells the story of North Dakota’s Mandan Indians, widely known for hosting Lewis and Clark during the winter of 1804-1805. The challenges the Mandans faced included epidemics of smallpox and whooping cough and invasions of Norway rats, which diminished Mandan numbers from more than 12,000 in 1500 to fewer than 300 in 1838. In this talk, Fenn will be speaking about her recent book, Encounters at the Heart of the World: A History …