But on the moon ... stretch over 270 km (168 miles) each, with depths of 2.7 km (1.7 miles) and 3.5 km (2.2 miles), respectively — comparable to Earth’s Grand Canyon. Now, researchers have ...

The extraordinary formations, each comparable in size to Earth’s Grand Canyon ... Earth and the moon. “Nearly four billion years ago, an asteroid or comet flew over the lunar south pole ...

Unlike the sudden appearance of the Moon canyons, the Earth’s Grand Canyon formed over millions of years as the Colorado River gradually eroded through the rock. Using data from Nasa’s robotic ...

A visit to the Grand ... While Earth's canyon was formed by the Colorado River over six to seven million years, the researchers say these were carved out in just 10 minutes. The moon's canyons ...

The Grand Canyon in Arizona got carved by water over millions of years of slow but steady erosion. Two similarly-sized canyons on the moon got carved by flying rocks in about ten minutes.

"Nearly four billion years ago," explains lead author David Kring (USRA), "an asteroid or comet flew over ... the Grand Canyon took millions of years to form, the two grand canyons on the Moon ...

But while the Grand Canyon was etched from the landscape over millions of years, these Moon valleys were carved in less than 10 minutes, according to a new study in Nature Communications.