house was originally located in Willow Creek and it was moved to its present site (on more than ) in front of the museum in 1989. At the museum, visitors can learn about the life of the Tinsleys and others who lived at the time. Children can try on clothes and play with contemporary toys of the time. The house includes a functioning outhouse, water pump and kitchen where food typical of the time is sometimes prepared. The Tinsleys migrated west during the American Civil War. William and Lucy [Nave] Tinsley met in Virginia City, Montana, where both worked. They relocated to the Gallatin Valley after they married. The Tinsleys built their house in 1889 when the original cabin became too small to accommodate their growing family. The house provides an overview of homestead life in the 1800s in the Gallatin Valley. The house was constructed of logs accumulated over the course of two years from the Tobacco Root Mountains. Many of the interior items are believed to have been ordered from the Sears catalog. Most items in the house have been donated by Tinsley descendants. Paleontology While not its sole focus, the museum is primarily known for its paleontological collections. However, this was not always the case as specimens found in Montana were usually taken out of state to other museums. This changed in 1990 with the discovery of a Tyrannosaurus Rex skeleton that would remain in Montana and be exhibited at the museum. While fossils continue to be the property of the federal government, the museum has been able to increase its collection (due in part to Curator Jack Horner's agreement and work with the United States Fish and Wildlife Service and the Federal Bureau of Land Management). The museum is now home to 13 Tyrannosaurus Rex specimens, including one of only two complete skeletons that have ever been found. Apart from housing one of the largest collections of dinosaur fossils in the world and the largest in the United States, the museum is also home to one of the world's largest Tyrannosaurus skulls (MOR 008) – narrowly surpassing that of the Chicago Field Museum's specimen, Sue. The museum's Siebel Dinosaur Complex is home to one of the first identified female dinosaurs, an ovulating T. rex. Curator Horner, who served as an adviser to the Jurassic Park films, was one of the lead scientists involved in the 2005