Monsoon moisture has turned the desert green, including unwanted weeds, so the National Park Service is attacking the problem from the air. Starting Wednesday, Aug. 4, a helicopter will be used to ...

Doug Siegel is among thousands of volunteers on a mission to “Save Our Saguaros,” one clump of buffelgrass at a time. “The Sonoran Desert is one of the most diverse deserts in the world, and if we ...