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

The lunar canyons Vallis Schrödinger and Vallis Planck are extraordinarily deep, and scientists now know the valleys were ...

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

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

In a significant discovery, a team of scientists at the Lunar and Planetary Institute (LPI), an institute of the Universities ...

Ann Houghton, a 73-year-old hiker, was found dead in the Great Smoky Mountains National Park after going missing over the ...

Colorado's Rocky Mountain National Park ... this babbling brook grows into the mighty river that carved out the Grand Canyon. For spectacular views, venture up to the Alpine Visitor Center.

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.

The Colorado River is the main artery of the Southwest. Find out how drought and climate change are impacting the river's waters.

A team of scientists at the Lunar and Planetary Institute (LPI), an institute of the Universities Space Research Association ...

The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.

A federal judge rejected a challenge from some of Arizona's top Republicans to undo the designation of the Baaj Nwaavjo I’tah ...