A park employee at the Grand Canyon was exposed to hantavirus, and a separate case of exposure to rabies in the park has also been confirmed.

The resident died from pneumonic plague, the first such death in Coconino County, Ariz., since 2007, the county said.

Feral critters have taken over California's Yosemite National Park, and experts and visitors fear this might just be the tip of the iceberg.

Rats can be cute, and we have all the proof right here. Dumbo rats are some of the most adorable rodents out there and people ...

An Arizona resident has died from pneumonic plague, a rare but highly dangerous lung infection, Coconino County health ...