The Grand Canyon in Arizona is one of Earth's natural wonders, carved out over millions of years by the gradual erosion power ...

The energy to produce the grand canyons on the Moon is about 130 times larger than the energy in the global inventory of nuclear weapons.

New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons on the lunar far side. That’s good news for ...