Perseverance just stumbled upon one of Mars’ weirdest rocks yet—a formation covered in dark, spherical shapes with mysterious ...

Arizona driver's licenses and ID cards feature a slew of special designs. Some are obvious, others aren't. Here is one ...

Maricopa County is introducing the Emergency Zones tool, an interactive map that provides critical information to residents ...

Deep beneath the mountains of the Himalayas, something remarkable is taking place. The vast, rocky plate supporting India, ...

US Geological Survey geologists estimated large potential for—and large uncertainty about—the amount of hydrogen ...

The hike to the top of this magnificent trail in Arizona is arguably the state's most challenging, but the views make it ...

For outdoor enthusiasts seeking active adventures, Clear Creek Reservoir and McHood Park offer refreshing alternatives to ...

The Arizona desert features some of the most breathtaking geological formations and scenic vistas on Earth. And nowhere is ...

The Jerome Grand Hotel, formerly the town’s hospital, sits at the highest point in town and is reportedly one of Arizona’s ...

Through the National Park Foundation, the nonprofit was set to receive a grant to create a podcast with the Ho-Chunk about the geological history of the trail. A separate grant funds an annual effort ...

The park sits atop an enormous supervolcano, and its geothermal features offer a vivid display of Earth’s inner workings. Don’t miss the Grand Prismatic Spring, a rainbow-colored hot spring that’s ...

In 1890, fire destroyed an entire business block in Flagstaff. In 1921, engineers reported that the Lyman Dam on the Little Colorado River was sinking into the mud, even as construction was under way.