Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...

Scientists proposed an explanation for the formation of Vallis Schrödinger and Vallis Planck near the lunar south pole, which ...

A federal judge says Arizona lawmakers and others lacked standing to sue the Biden administration over its creation of a new ...

A colossal impact billions of years ago carved out the canyons that rival the most breathtaking features here on Earth in a matter of minutes, ...

The Arizona State Senate Republican Caucus sued the Biden Administration for the creation of Ancestral Footprints of the ...

That's good news for NASA, which is looking to land astronauts at the south pole on the near, Earth-facing side later this ...

"Whereas Arizona’s Grand Canyon was carved by water over the last 5 to 6 million years and from integrated paleocanyons that ...

The rustic lodge that offers one of the most sought-after experiences at Grand Canyon National Park will be closed through March 2025. All operations at the historic Phantom Ranch, including ...

U.S. District Court Judge Stephen McNamee said Senate President Warren Petersen and Ben Toma, who has been speaker of the ...

GRAND CANYON NATIONAL PARK, AZ (AZFamily) — People can once again enjoy a hike at Arizona’s world-famous natural wonder. The National Park Service said on Wednesday evening that inner canyon ...