A crater on Mars has a bright patch of ice. It's the second time in over a decade that the crater and ice has been observed ...

Lawmakers continue to work to get President Trump's "big, beautiful" budget bill passed, and we're looking at the impacts here in Arizona.

Grant Marek is SFGATE’s editor-in-chief. He’s held various editorial roles for Thrillist, Yahoo Sports, the San Francisco ...

A sacred Apache site east of Phoenix may soon be turned into a two-mile crater to make way for mining of $150 billion worth ...

The HOKA Festival of Miles offered a buffet of drama for fans of prep 4-lap action on a warm, calm, perfect-for-racing night ...

The Hawaii Volcano Observatory says lava fountains were reaching over 330 feet Wednesday and would likely go higher before ...

Currently, Turkmenistan’s Door to Hell measures roughly 230 feet wide by 100 feet deep, and often exceeds 1,832 degrees ...

From Alaska to California and Arizona to Colorado, these are the Most Treasured Views across the West. Explore this travel ...

From Horseshoe Bend to Grand Canyon's Mather Point to the Chiricahua Mountains, these are the Most Treasured Views in AZ. Here's how to plan a trip.

America’s first Chief Geologist, G.K. Gilbert — working for J.W. Powell, of Grand Canyon fame — rode his horse through the ...

KANSAS CITY, Mo. — Houston is off to a No. 1 NCAA Tournament seed and maybe even a Final Four or national championship. That much was clear again Saturday, when the Cougars beat Arizona 72-64 in ...

In 1669, in what has been considered the volcano's worst known eruption, lava buried a swath of Catania, about 15 miles away ...