The vast valleys of Vallis Schrödinger and Vallis Planck demonstrate the incredible forces that shaped the face of the Moon.

Across the Arizona-Sonora Desert Museum's 98 acres, you'll find 230 animal species – including hummingbirds, coyotes and string rays – along with 1,200 local plant species. Next to the ...

The far side of the Moon has its own versions of the Grand Canyon—two of them, in fact! A new study explains how these deep ...

The desert city in southern Arizona is a sanctuary for stargazers—and now it's even easier for visitors to explore.

The Petrified Forest always reminds me of the suburbs of the moon. A vast thin-grass prairie ... To discover they walk around the Arizona desert in the deep moonlight would surprise me not ...

From Grand Canyon to Petrified Forest to Saguaro National Park, here are the best things to do in Arizona's most beautiful places.

Save the date for #ThisIsTucson's third annual market featuring 100 vendors, food trucks, live music and more on Feb. 22 in ...

Nasa astronauts are testing augmented reality spacesuits in desert trials to simulate a planned return to the Moon. Astronauts tested technology that could be deployed in the Artemis III missions ...

I was absorbed into stories about the saguaro cactus, native to and a symbol of the desert (its blossom is the state flower of Arizona). They live long – some can reach 150 to 200 years – and ...

The Grand Canyon in Arizona is one of Earth's natural wonders, carved out over millions of years by the gradual erosion power ...