The largest data centers can guzzle millions of gallons of fresh water a day. Roughly 40% are located in the most ...

The Arizona Department of Transportation (ADOT) is advancing its study of passenger rail service between Phoenix and Tucson.

NASA science dollars generate $337 million in Arizona's economy each year, so the budget bill as written now would be a huge ...

Arizona is tussling with other states over how much of the Colorado River it should receive. But how will Arizonans divide ...