ARIZONA IS A state in the southwestern part of the continental United States. It was the 48th state to join the union, which it did in 1912. It is bordered to the south by the Mexican state of Sonora, to the east by New Mexico, and to the north by Utah. The Colorado River forms the western border, separating Arizona from California and Nevada. Much of the state is occupied by flat, hot deserts, but there are also large stands of evergreen trees and many lakes—man—made as well as natural—that lend variety to the topography and land cover of the state. Geographical features such as the Grand Canyon are internationally renowned. The state is the 6th largest in the country, with a total area of nearly 114,000 square miles, but its population of a little less than 6.5 million is the 16th largest in the country, which indicates a Arizona ...