to current exhibits were needed because of the increased attendance. Between 1991 and 1994, a number of exhibit halls were renovated and the expansion of the Sterling Hall of Research was completed. The Cockrell Butterfly Center and the Brown Hall of Entomology opened in July 1994. In March 2007, the museum opened the HMNS Woodlands X-ploration Station, located in the Woodlands Mall. The facility was home to an interactive Dig Pit, where children could excavate a mock Triceratops, a variety of living exhibits, fossils, and minerals. The Woodlands location closed on September 7, 2009, less than a month before HMNS opened a satellite museum in Sugar Land, Texas. HMNS celebrated its 100th year in 2009. During that year, the museum offered a multitude of family programs, lectures, free events, and kids' classes as part of the "Fun Hundred" celebration. On October 3, 2009, HMNS opened its satellite museum in Telfair, Sugar Land. The building and surrounding land that became HMNS at Sugar Land was once part of the Central Unit, a Texas Department of Criminal Justice prison that had been unoccupied for several decades. In March 2012, the Wortham IMAX Theatre was converted from 70 mm film to 3D digital and renamed the Wortham Giant Screen Theatre. In June 2012, HMNS opened a new 230,000 square foot wing to house its paleontology hall, more than doubling the size of the original museum. Paleoartist, Julius Csotonyi, created fourteen murals based closely on concept drawings by HMNS Curator of Paleontology, Robert Bakker, for the new paleontology hall. The Morian Hall of Paleontology contains more than 60 large skeleton mounts, including three Tyrannosaurus rex and three large Quetzalcoatlus. Permanent Exhibits The Foucault pendulum, demonstrating the Earth's rotation. The length of the pendulum's cable is over long. Cullen Hall of Gems & Minerals, featuring a large exhibit of over 750 crystallized mineral specimens and rare gemstones. Lester and Sue Smith Gem Vault, showcasing some of the most exquisite finely cut gems in jewelry. Farish Hall of Texas Wildlife exhibits animals and wildlife native to Texas. The hall contains a video wall that displays the plants, animals and topography of the seven biotic regions of the state. Evelyn and Herbert Frensley Hall of African Wildlife, a display of taxidermied animals, including one of only two okapis exhibited in North America. Opening in 1969, the hall allows visitors to explore the seven biomes of the continent