A new study from the University of Arizona reveals how historical tree-ring data can help predict extreme summer weather ...

While the groundbreaking Paris Climate Accord has pledged to limit future temperature increases to 1.5 to 2 degrees Celsius (2.7 to 3.6 degrees Fahrenheit), “I don’t think you need to worry about 1.5 ...

PHOENIX — A Phoenix boy was among the contestants eliminated at the National Geographic Bee in Washington. Ari Mehta was knocked out in the preliminary round Monday. Mehta, from Desert Cove Elementary ...

The monsoon is known to be sporadic, and this year was no exception. With weeks of dry days, a wall of dust that descended one August afternoon and a late-September storm that soaked Phoenix, Monsoon ...

Interstate 40 is not an arbitrary boundary for Mexican wolf recovery, it is a generous extension northward and based on the best historical, ecological, and genetic scientific information available.