The rare Sonoyta pupfish were introduced into a desert river habitat inside the huge Biosphere 2 structure near Tucson. The dish are native to Quitobaquito Springs near the Arizona-Mexico border, but ...

ORACLE, Ariz. — Plopped in the Sonoran Desert, just outside Tucson, Ariz., sits a massive, multilevel greenhouse that's probably best known as the inspiration for a Pauly Shore movie. A slick, stepped ...

After decades spent clinging to existence in a single, spring-fed oasis in southwestern Pima County, the endangered Sonoyta pupfish is giving indoor living a try. Four dozen of the feisty little ...

Add Yahoo as a preferred source to see more of our stories on Google. ORACLE, AZ — Four dozen Sonoyta pupfish are now swimming beneath the towering glass pyramids of the University of Arizona’s ...