Arizona is home to one of the most unique science experiments in the world. Biosphere 2 is a groundbreaking research facility studying climate change and ecosystems inside an enclosed glass structure ...

Andy Lifschutz, whose fine jewelry brand is called Andy Lif, was in Tucson searching for Guatemalan jade, among other stones.

The wolves were captured from and released back to three packs in Siskiyou, Lassen and Sierra counties, state wildlife officials said.

Laguna la Cruz on the Gulf of California coast in Sonora, Mexico, is an important stopover point for many migratory species.

Conservationists are determined to protect the magnificent rays of the Pacific—whether that’s tracking them with acoustic ...