In addition to the Bird's Eye View Theater, Environment Theater and 3-D Theater, the Global Environment Hall houses four exhibit areas: Microscopic World, Life on Earth, Taiwan's Ecology and the Tibetan Plateau Remote Astronomical Observation Exhibition. Also in this hall are Classroom Theaters which cover themes of: The Dynamic Earth, Underground Treasures, Exploring the Ocean, Man and the Environment, and Species Conservation. In 2008, Science on a Sphere (SOS) was introduced. This multimedia exhibition system features a 173cm diameter animated globe that reveals Earth's dynamic changes.