Diplodocus, Allosaurus, Stegosaurus, and Camptosaurus, while those from the Cenozoic include a giant terror bird, an armoured glyptodont, a giant seabird called Pelagornis sandersi, a hyaenodont, and fossil crocodilians of the era, especially champsosaurs from the sixty-million-year-old Wannagan Creek site in North Dakota the museum works at. The gallery also features two sculpted, 17-foot-tall Quetzalcoatluses, giant flying reptiles from the late Cretaceous that were known for their long beaks and broad, bat-like wings. The Human Body Gallery shows visitors the various tissues, organs, and systems (such as blood or digestion) that make up the human body. There is a mummy on display here, as well as Weighing the Evidence, an experience that helps visitors separate fact from fiction in healthcare decisions, featuring artifacts from the former Museum of Questionable Medical Devices. The museum acquired these pieces in 2002 when its original owner Bob McCoy, son of Wilson McCoy, retired and donated the collection. The Experiment Gallery allows visitors to explore concepts in physics, math, and physical and earth science with interactive displays. Sportsology, a study of the body in motion, gives visitors a better idea of what it takes to make a basket, swing a racket, or score a goal. RACE: Are We So Different? is the first national exhibition to tell the stories of race from the biological, cultural, and historical points of view. We Move & We Stay features artifacts and historical content about the Dakota and Ojibwe people. The Mississippi River Gallery takes advantage of the museum's proximity to the river and a National Park to educate visitors about its natural resources. Visitors can learn about the environment and animals of the river. It is also home to The Collectors' Corner. Traders (primarily children) bring in natural artifacts they have found to trade them for points or another artifact. Facilities Omnitheater The Mississippi riverfront facility has a convertible dome IMAX theater. With both a wall screen for IMAX films and other flat-screen presentations and a rotating dome, for viewing IMAX dome presentations, it was the first convertible theater in the northern hemisphere. The counterweights for the system were so massive that they had to be put in place before the rest of the building. When it opened in 1999, the theater boasted "the largest permanently installed electronic cinema projector in the world", an advanced computer system to coordinate the theater's facilities, and a complex sound system to