Will people continue to hike and bike the Arizona Trail? Extreme weather and land use challenges may test the limits.

Introduction | From Utah: Wildfire  | From the South Rim: Water | From Flagstaff: Public Lands | From Payson: Transitions | ...

In the 1970s, 80% of Americans took vacations, and most of those were by car. Here are 10 wildly nostalgic U.S. road trips ...

Stefan Lovgren writes on how freshwater fish from the Arctic to Africa are endanged by climate change and the unpredictable ...

For a desert state, 11 inches of rain is the definition of extreme weather. Its power is like almost no other natural force ...

That being said, when visiting each of the states of the great US of A, there are certainly places locals and well-seasoned ...

An unassuming rock layer in the Grand Canyon just exposed a fossil secret that changes everything we thought we knew.

The Quadrantid meteor shower will peak overnight between Jan. 2 and Jan. 3, offering a brief but intense burst of meteors.

The unincorporated community stopped receiving water from Scottsdale when it adopted its drought mitigation plan.

National parks across the United States vary dramatically from desert to beach, forest to mountains, offering some of the ...

The strict regulations of the Endangered Species Act inhibit development and “energy domination,” the Trump administration claims.

Residents of Phoenix, Arizona, recently received incredible news when Salt River Project announced that the iconic Bartlett ...