PHOENIX — The operator of the nation's largest nuclear power plant is considering adding two new reactors to the Palo Verde Nuclear Generating Station to meet the region's skyrocketing power needs.

Palo verde trees are bursting into early bloom around Tucson — creating splashes of yellow desert beauty but also ushering in a season of sniffles for some allergy sufferers. “This year is earlier ...

Shares of Palo Alto Networks Inc. slid on Thursday after the company a day earlier lowered its full-year outlook for billings, a key measurement of demand. But despite a downgrade from one analyst, ...

Palo Alto’s election of mayor and vice mayor, which often feels more like a coronation than a contest, turned fiercely competitive this year, as Ed Lauing narrowly edged out Vicki Veenker for the ...