1. On February 3, 1877, the town of Tombstone was incorporated, becoming one of the most famous Old West towns in Arizona. This is where the infamous shootout at the O.K. Corral took place in 1881.
2. In 1912, Arizona became the 48th state in the United States on February 3.
3. The Grand Canyon National Park was established in Arizona on February 3, 1919. It covers over 1.2 million acres and is one of the most popular tourist destinations in the world.
4. The Biosphere 2 research facility was opened in Oracle, Arizona on February 3, 1991. The facility was designed to study the impact of humans on the Earth's ecosystems and to develop technologies to stabilize our planet's environment.
5. On February 3, 2009, the Super Bowl was played in Arizona for the second time in history at the University of Phoenix Stadium. The Pittsburgh Steelers defeated the Arizona Cardinals 27-23 in a thrilling game.