Large wildfires in the desert were once rare. Now experts worry that invasive plants and a changing fire cycle are putting ...

Three ongoing Tucson art exhibits invite viewers to reflect on the constancy of immigration throughout history, with all of its joys and challenges, as well as the psychological and environmental ...

Immediate and organized opposition developed this week in Flagstaff to the proposition originated Tuesday in the state good ...

Economist Kimberly Clausing joined ABC News Live to talk about the possible effects for Americans of Trump’s newly imposed tariffs. Many CDC webpages were down as of Friday evening due to ...