San Diego Natural History Museum is one of the oldest scientific institutions in southern California and west of the Mississippi. Located in San Diego, the museum displays models of dinosaurs and mammoths and invites visitors to discover the fossil history of the region. Visitors can also examine the fossil evidence from the museum’s collection and use scientific tools to get answers to their queries. The museum features items that have a 75 million-year timeline, from the age of dinosaurs to the ice ages in southern California and Baja California, Mexico. It also operates a theater with a 300-seat capacity that has multiple capabilities, advanced acoustics and technology. The theater shows films concerning the natural environment on topics, such as global warming.