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.

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

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.

Wondering what to do in Grand Canyon National Park? From river rafting to the Grand Canyon Skywalk, these are some of the best things to do in the Grand Canyon.

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.

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.

Guide to the best hotels and things to do in Grand Canyon National Park. Maps, travel tips and more.

Jutting off in straight lines from a massive crater like two bilby ears near the Moon's South Pole, is a pair of valleys similar to the Grand Canyon in size.