Scientists reveal a never-before-seen species of leopard-size apex predator that lived in lush forest 30 million years ago.

Biosphere 2 is a groundbreaking research facility studying climate change and ecosystems inside an enclosed glass structure in the middle of the Sonoran Desert.

The aviation museum in Tucson has new planes, some of which you can go in. Here's how long it takes to go through the museum and how to get tickets.

As the weather changes and spring approaches, Arizona residents may see more animals, including Gila monsters, snakes and ...

The Arizona Game and Fish Department is investigating what it believes to be an intentional poisoning, leaving dozens of animals dead in Tucson. Officers discovered several dead coyotes ...