Fernbank Museum of Natural History, in Atlanta, is a museum in that presents exhibitions and programming about natural history that are meant to entertain as well as educate the public. Its mission is to encourage a greater appreciation of the planet and its people. Fernbank Museum has a number of permanent exhibitions and regularly hosts temporary exhibitions in its expansive facility, designed by Graham Gund Architects. Giants of the Mesozoic, on display in the atrium of Fernbank Museum, features a 123-foot (37 m) long Argentinosaurus (the largest dinosaur ever classified) as well as a Giganotosaurus. The permanent exhibition, A Walk Through Time in Georgia, tells the twofold story of Georgia's natural history and the development of the planet. The nearby Fernbank Science Center, operated by the DeKalb County Board of Education, hosts additional exhibits and educational activities, as well as a planetarium, telescope, and 65-acre (260,000 m) natural forest.