New research has discovered 16 new desert grasshopper species, revealing their Ice Age-driven isolation and diversification.

A new 280-mile-long freeway that would go from Nogales to Wickenburg is in a court battle. ADOT and the Federal Highway ...

Scientists have long suspected that Mexican long-nosed bats migrate through southeastern Arizona, but without capturing and ...

Tucson’s known for natural wonders. But for snowbirds after a different side of the Southwest, the dynamic downtown is ...

Arizona The Grand Canyon is a testament to the earth's artistic powers, with its sprawling vistas and breathtaking colors.

Arizona/Utah Border, USA Nestled between the sandy terrains of Arizona and Utah, The Wave is a geological marvel that looks ...

With threats of avian flu and lead poisoning, biologists are working overtime to care for a species that nearly went extinct.