With 22 national parks and monuments to its name, Arizona boasts some of the most astonishing landscapes in the country, from the Grand Canyon to the towering buttes of Monument ...
New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons ...
Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...
Scientists say America is no longer the only place with a Grand Canyon as NASA spots two enormous chasms carved into the ...
The Earth's Grand Canyon took millions of years to carve, but the moon's grand canyons took about ten minutes.
Scientists proposed an explanation for the formation of Vallis Schrödinger and Vallis Planck near the lunar south pole, which ...