National Museum of Natural History
The museum's collections total over 500 million specimens of plants, animals, fossils, minerals, rocks, meteorites, and human cultural artifacts (made objects). With 7.4 million visitors in 2009, it is the most visited of all of the Smithsonian museums. It is home to about 185 professional natural history scientists – the largest group of scientists dedicated to the study of natural and cultural history in the world.