Arizona may conjure images of cacti and vast desert, but then I remember the Grand Canyon of the mighty Colorado River ...

Arizona's saguaro cactus has evolved to thrive in the extreme climate of the Sonoran Desert, but after decades of rising heat, even these towering icons are showing signs of stress. "It doesn't take a ...

As wild burro populations grow, they're putting native vegetation at risk, a new study shows, including the saguaro cactus.

By analyzing the natural vibrations of a saguaro, scientists can study the cactus's insides without cutting them open.

High in Arizona's mountains, this peaceful lake surrounded by lush evergreens offers pristine fishing, kayaking, and camping ...