The United States is home to a wide variety of state nicknames, each one reflecting a unique aspect of a state's history, culture, or geography. Yet, few are as iconic and universally recognized as ...

1. Texas might lay claim to NASA, and Nevada to the mysterious Area 51, but Arizona has its share of achievements in the outer space game. Pluto was discovered from the Lowell Observatory in Flagstaff ...

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Tom Zoellner went for a walk. A long one, across Arizona, along the Arizona Trail — some 800 miles of varying terrain from the Utah state line to the border with Mexico (and then farther). He saw a ...

Interstate 40 is not an arbitrary boundary for Mexican wolf recovery, it is a generous extension northward and based on the best historical, ecological, and genetic scientific information available.