Dotting the vast, arid expanses of the Great Basin and Mojave deserts are precious springs housing improbable and rare forms of life that, while small, play a huge role in their ecosystems.

Dotting the vast, arid expanses of the Great Basin and Mojave deserts are precious springs housing improbable and rare forms of life that, while small, play a huge role in their ecosystems.

There are four major deserts in the United States. A portion of each of them -- the Sonoran, Mojave, Chihuahuan, and Great Basin -- are at least partially within the state of Arizona. This makes ...