Cleaning graffiti off a saguaro presents an unusual challenge. The tree-like cactus's protective spines make it incredibly difficult for park rangers to wash away the paint. Climate awareness ...

A planned expansion of the park’s east entrance parking lot has created a unique opportunity to study these protected desert giants.

True, the prickly pear is not as aesthetically pleasing, nor does it have the stereotypical shape that screams “CACTUS” to outsiders. But slapping a saguaro on any apparel or art meant for a ...