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

The gigantic cataclysm, which released energy 130 times more powerful than the detonation of the entire world’s atomic ...

Federal judge dismisses Arizona GOP lawsuit challenging Biden's designation of Baaj Nwaavjo I'tah Kukveni National Monument ...

A midair collision at the Grand Canyon killed over 100. The disaster partially led to the start of the FAA and changed air ...

The 1956 collision over the Grand Canyon killed more than 100 people. At the time, it was the deadliest civilian plane crash and it remains one of the worst in U.S. history. Here's everything you ...

Formed over thousands of years of erosion caused by hydrothermal activity, water and other natural forces, the Grand Canyon of the Yellowstone is the primary attraction in the Canyon Village area ...

The moon's Schrödinger impact basin near the south pole holds two grand canyons formed by an enormous asteroid collision 3.8 ...

Projectiles flying faster than bullets from a blast 130 times bigger than the global nuclear stockpile helped form giant lunar canyons, according to a new study.

When visiting Grand Canyon West, travelers are immersed in the rich culture and history of the Hualapai Nation. This tour will show you the best of the West Rim, including the glass-bottomed Grand ...

Trump has a history of downsizing national monuments ... Polling recently released by the Grand Canyon Trust indicated that a substantial majority of Arizonans, including Republicans, favor ...

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