The American Museum of Natural History (abbreviated as A.M.N.H) is a natural history museum on the Upper West Side of Manhattan in New York City. Located in Theodore Roosevelt Park, across the street from Central Park, the museum complex comprises 20 interconnected buildings housing 45 permanent exhibition halls, in addition to a planetarium and a library. The museum collections contain about 35 million specimens of plants, animals, fungi, fossils, minerals, rocks, meteorites, human remains, and human cultural artifacts, as well as specialized collections for frozen tissue and genomic and astrophysical data, of which only a small fraction can be displayed at any given time. The museum occupies more than . AMNH has a full-time scientific staff of 225, sponsors over 120 special field expeditions each year, and averages about five million visits annually.
The AMNH is a private 501(c)(3) organization. The naturalist Dr. Albert S. Bickmore devised the idea for the American Museum of Natural History in 1861, and, after several years of advocacy, the museum opened within Central Park's Arsenal on May 22, 1871. The museum's first purpose-built structure in Theodore Roosevelt Park was designed by Calvert Vaux and J. Wrey Mould and opened on December 22, 1877. Numerous wings have been added over the years, including the main entrance pavilion (named for Theodore Roosevelt) in 1936 and the Rose Center for Earth and Space in 2000.
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The naturalist Dr. Albert S. Bickmore devised the idea for the American Museum of Natural History in 1861. At the time, he was studying in Cambridge, Massachusetts, at Louis Agassiz's Museum of Comparative Zoology. Observing that many European natural history museums were in populous cities, Bickmore wrote in a biography: "Now New York is our city of greatest wealth and therefore probably the best location for the future museum of natural history for our whole land." For several years, Bickmore lobbied for the establishment of a natural history museum in New York.