A charming Arizona town in the west was designated as the world's first International Dark Sky City, meaning it offers beautiful views of the Milky Way.

“The Sky Island Mountains are not just beautiful landscapes ... this species endures for future generations.” University of Arizona ecologist Michael Bogan (right) shocks the water in a ...

Various species of talus snail species are likewise limited to a single mountain range, Arizona’s Santa Rita Mountains. Such species are particularly vulnerable to threats like large-scale resource ...

Mexican long-nosed bats have been identified in southeastern Arizona through citizen scientist efforts and innovative DNA technology.