The premier natural history museum in Arizona. Explore the Southwest from the creation of the earth 4.5 billion years ago to the present. See the origins of life on earth, meteorites and minerals. In Dinosaur Hall, discover some of the biggest dinosaurs that ever lived, see how some appeared and sounded on Dinosaur Mountain. Then Walk through Time exploring ancient Arizona’s Paleozoic Seas, Triassic Petrified Forest, Cretaceous Seas, and the first animals to fly.