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By Dave DeFusco A team of National Park Service researchers will study the biological diversity of Saguaro National Park’s “sky island”...
By Robert Pahre The Battle of Glorieta Pass, which took place from March 26 to 28, 1862, was the decisive battle...
By Dave DeFusco Desert vegetation surrounding the saguaro cactus in Saguaro National Park has been remarkably stable despite the presence of...
During Women’s History Month, the National Park Service (NPS) celebrates a tradition of service and leadership that continues today in many...
In the Mojave Desert, the driest and smallest desert in the United States, permanent sources of water are few and far...
Long-term research by NPS staff and other scientists suggests that, since the 1990s, a punishing drought has severely hampered the germination...
The sun rises over the Rincon Mountains east of Tucson, Arizona, beaming hues of orange, pink and purple into the sky....
Just miles from the site where the U.S. military detonated the first atomic bomb, scores of species entirely new to science...
In 2010, the Peregrine Fund reported that 72 percent of condors captured in Arizona had lead in their blood. Of this...
Emma steps out often but stays close to home. After almost drowning, Ward kept a low profile for 12 years. King...
It was mid-October, and it was still hot in the Sonoran Desert. The land was beyond parched. The creosote leaves looked...
About 300,000 years ago, during the last big Ice Age, a small red creature traversed the deep snow of what is...