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History and nature enthusiasts must visit the Field Museum in Chicago. The museum boasts an impressive collection of over 21 million specimens that showcase the history of human and animal life in different regions. One of the museum's key attractions is Sue, the most complete Tyrannosaurus Rex skeleton worldwide. The Field Museum offers permanent and rotating exhibits that provide an insight into the world's natural history. The museum features a wide range of exhibits, including Mammals of Asia, Mammals of Africa, the Grainger Hall of Gems, Underground Adventure, Inside Ancient Egypt, Evolving Planet, The Ancient Americas, DNA Discovery Center, McDonald's Fossil Prep Lab, and the Regenstein Laboratory. The Field Museum Library is home to over 275,000 volumes of research collections, which are fundamental for the museum's scientific staff. The Library provides information on biology, anthropology, botany, geology, archaeology, museology, and other fields of study.