The nonprofit conservation group American Forests added the plant northwest of Tucson to its list of national champions in 2016. Arizona is now home to 70 such champion trees, including nine in ...

PHOENIX — Amid the Arizona heat, researchers are finding Fremont Cottonwood trees can cool themselves down, but their survival depends on consistent water access. The trees essentially sweat ...

But it doesn’t have to be that way, thanks to Arizona’s endless diversity ... climbs a steep hillside before swooping through the trees, fast and flowy, hugging the curves.