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Arizona (/ˌærɪˈznə/ ARR-ih-ZOH-nə; Navajo: Hoozdo Hahoodzo [hoː˥z̥to˩ ha˩hoː˩tso˩]; O'odham: Alĭ ṣonak [ˈaɭi̥ ˈʂɔnak]) is a landlocked state in the Southwestern region of the United States. Arizona is part of the Four Corners region with Utah to the north, Colorado to the northeast, and New Mexico to the east; its other neighboring states are Nevada to the northwest, California to the west and the Mexican states of Sonora and Baja California to the south and southwest. It is the 6th-largest and the 14th-most-populous of the 50 states. Its capital and largest city is Phoenix.

Arizona is the 48th state and last of the contiguous states to be admitted to the Union, achieving statehood on February 14, 1912. Historically part of the territory of Alta California and Nuevo México in New Spain, it became part of independent Mexico in 1821. After being defeated in the Mexican–American War, Mexico ceded much of this territory to the United States in 1848, where the area became part of the territory of New Mexico. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase.

Southern Arizona is known for its desert climate, with very hot summers and mild winters. Northern Arizona features forests of pine, Douglas fir, and spruce trees; the Colorado Plateau; mountain ranges (such as the San Francisco Mountains); as well as large, deep canyons, with much more moderate summer temperatures and significant winter snowfalls. There are ski resorts in the areas of Flagstaff, Sunrise, and Tucson. In addition to the internationally known Grand Canyon National Park, which is one of the world's seven natural wonders, there are several national forests, national parks, and national monuments.

Arizona is home to a diverse population. About one-quarter of the state is made up of Indian reservations that serve as the home of 27 federally recognized Native American tribes, including the Navajo Nation, the largest in the state and the country, with more than 300,000 citizens. Since the 1980s, the proportion of Hispanics has grown significantly owing to migration from Mexico. A substantial portion of the population are followers of the Roman Catholic Church and the Church of Jesus Christ of Latter-day Saints. Arizona's population and economy have grown dramatically since the 1950s because of inward migration, and the state is now a major hub of the Sun Belt. Cities such as Phoenix and Tucson have developed large, sprawling suburban areas. Many large companies, such as PetSmart and Circle K, have headquarters in the state, and Arizona is home to major universities, including the University of Arizona and Arizona State University. The state is known for a history of conservative politicians such as Barry Goldwater and John McCain, though it has become a swing state since the 1990s. (Full article...)

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Four Corners Monument, after its 2010 reconstruction

The Four Corners Monument marks the quadripoint in the Southwestern United States where the states of Arizona, Colorado, New Mexico, and Utah meet. It is the only point in the United States shared by four states, leading to the area being named the Four Corners region. The monument also marks the boundary between two semi-autonomous Native American governments, the Navajo Nation, which maintains the monument as a tourist attraction, and the Ute Mountain Ute Tribe Reservation.

The origins of the state boundaries marked by the monument occurred just prior to, and during, the American Civil War, when the United States Congress acted to form governments in the area to combat the spread of slavery to the region. When the early territories were formed, their boundaries were designated along meridian and parallel lines. Beginning in the 1860s, these lines were surveyed and marked. These early surveys included some errors, but even so, the markers placed became the legal boundaries, superseding the written descriptions of geographical meridians and parallels. This includes the Four Corners Monument, which has been legally established as the corner of the four states. (Full article...)
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Antelope Canyon
Antelope Canyon
Credit: Luca Galuzzi

An HDR image of Upper Antelope Canyon, Page, Arizona. Antelope Canyon is the most-visited and most-photographed slot canyon in the Southwestern United States. It was formed by erosion of Navajo Sandstone, primarily due to flash flooding and secondarily due to other sub-aerial processes. Photography within the canyons is difficult due to the wide exposure range (often 10 EV or more) made by light reflecting off the canyon walls.

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Did you know?
  • ...that holiday mail seeking a Christmas postmark continued to be sent to Christmas, Arizona, two decades after the town's post office had closed?
  • ... that after assuming his post on the Arizona Territorial Supreme Court, Judge DeForest Porter was surprised to learn that area temperatures reached 114 °F (46 °C)?

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Ruth Elizabeth "Bazy" Tankersley (née McCormick, formerly Miller; March 7, 1921 – February 5, 2013) was an American breeder of Arabian horses and a newspaper publisher. She was a daughter of U.S. Senator Joseph Medill McCormick. Her mother was progressive Republican U.S. Representative Ruth Hanna McCormick, making Tankersley a granddaughter of Senator Mark Hanna of Ohio. Although Tankersley was involved with conservative Republican causes as a young woman, including a friendship with Senator Joseph McCarthy, her progressive roots reemerged in later years. By the 21st century, she had become a strong supporter of environmental causes and backed Barack Obama for president in 2008.

Tankersley's father died when she was a child. When her mother remarried, the family moved to the southwestern United States, where Tankersley spent considerable time riding horses. She became particularly enamored of the Arabian breed after she was given a part-Arabian to ride. At the age of 18, she began working as a reporter for a newspaper published by her mother. She later ran a newspaper in Illinois with her first husband, Peter Miller. In 1949, she became the publisher of the conservative Washington Times-Herald. That paper was owned by her uncle, the childless Robert McCormick, who viewed Tankersley as his heir until the two had a falling out over editorial control of the newspaper and her relationship with Garvin Tankersley, who became her second husband. After The Washington Post absorbed the Times-Herald, she shifted to full-time horse breeding. (Full article...)

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