The Smithsonian Institution Libraries hosted a two-day symposium titled “The Era of Experiments and the Age of Wonder: Scientific Expansion in the 17th-19th Centuries” March 4 and 5 in the National Museum of American History. This celebration marked the reopening of the Dibner Library of the History of Science and Technology, one of the Libraries’ two facilities for rare books and manuscripts, the Dibner Library lectures and the Resident Scholar program.