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

Projectiles flying faster than bullets from a blast 130 times bigger than the global nuclear stockpile helped form giant ...

Moon Grand Canyon carved out in less than 10 minutes by bullet-fast space rocks - Space rocks travelling as fast as a bullet ...

GRAND CANYON NATIONAL PARK, Ariz.— Tribes, conservation organizations and community groups today defended Baaj Nwaavjo I’tah ...

Two gigantic canyons on the moon — both deeper than the Grand Canyon — were carved in less than 10 minutes by floods of rocks ...

Landscape photographer Rolf Maeder went out for a routine trip with a couple of friends to photograph sunsets at the Grand Canyon, near his home in Arizona.What he got was something spectacular ...

MICHIO KAKU: The Grand Canyon in Arizona. 270 miles of Colorado River flow across two states, carving out a chasm one mile deep. It's created a landscape on an epic scale. DR DAVE THAYER ...

The city of Flagstaff has taken big steps to preserve the clarity of its night sky. Find out the best ways to experience the ...

Grand Canyon Railway offers a year-round schedule from the historic depot in Williams, AZ, to the South Rim, plus Polar ...

New research reveals that two massive lunar canyons, deeper than the Grand Canyon, were formed in under 10 minutes by intense ...

As the train travels north from Williams, riders will see views of a high desert landscape. As the train moves closer to the Grand Canyon, the landscape transitions to prairies and then pine ...

Iconic outdoor destinations like Great Smoky Mountains National Park and the Grand Canyon are justifiably popular, but there are many lesser-known sites to discover, both in the U.S. and abroad.