Spanning 25 miles in diameter, this crater is three times the size of the Grand Canyon, making it the largest known impact site in the U.S. and the 15th largest on Earth.

Scientists say America is no longer the only place with a Grand Canyon as NASA spots two enormous chasms carved into the lunar surface.

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.

The LRO's latest mosaic of Shackleton Crater is proof of this in action. At 12.4 miles (20 km) across, few craters visible on land on Earth even come close.

Little worlds have bigger features, and so the "tallest mountain" or "grandest canyon" on Earth just can't compete with the rest of the Solar System. Who knows?

Two gigantic canyons on the moon — both deeper than the Grand Canyon — were carved in less than 10 minutes by floods of rocks traveling as fast as bullets, a new study finds.

Shackleton crater spans roughly 12.4 miles wide (20 km) and 2.6 miles deep (1.3 km), making it deeper than the Grand Canyon, according to the C enter for Lunar Science and Exploration.

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

Underneath Antarctica’s ancient, frozen landscape lies a hidden subglacial valley larger than the Grand Canyon. The recently discovered Antarctic trench, sculpted millions of years ago, is ...

The ice sheet that covers Antarctica is ancient, hiding a whole landscape of mountains and valleys that once teemed with life. Using radar and satellite ...

The lunar canyons Vallis Schrödinger and Vallis Planck are extraordinarily deep, and scientists now know the valleys were carved by bullet-fast moon rocks.