The History of Science Collections, located on the 5th floor of Bizzell Memorial Library, is a premier research collection in its field. Holdings of nearly 100,000 volumes from every field and subject area of science, technology and medicine range chronologically from Hrabanus Maurus, Opus de universo (1467) to current publications in the history of science. The Darwin collection illustrates the capacity of the holdings to support research: it consists of all of Darwin’s works in their first editions and several autograph letters. In addition, it includes hundreds of subsequent editions and translations (for example, the Descent of Man in Yiddish, 1928). These rare works, along with current works about Darwin, are all shelved together in the same area to facilitate browsing and research.