The museum's collections focus on the physical and cultural history of the Rocky Mountains and the people and animals who have lived there, and date back more than 500 million years. Permanent exhibits include: Enduring Peoples, which chronicles the life of American Indians on the Northern Plains and near the Rocky Mountains; History of the Northern Rocky Mountain Region, whose inhabitants included Native Americans, fur traders, gold seekers, and white settlers from frontier days through World War II; Living History Farm, which includes the Tinsley House, where costumed interpreters demonstrate life in a turn-of-the-century home; and the Taylor Planetarium, a 40 ft (12 m), 104-seat domed theater.