This surprising connection between Arizona's world-renowned geological features stretches back 56,000 years, to when a ...

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.

Geology is full of detective stories about the Earth's history, and a new paper in Geology by University of New Mexico ...

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. CNN values your feedback 1.

The extraordinary formations, each comparable in size to Earth’s Grand Canyon, are hidden on the far side of the moon — the side that always faces away from Earth — near the lunar south pole ...

A remarkable coincidence occurred 56,000 years ago, when the impact that created Meteor Crater triggered both a landslide-dammed lake and a paleolake formation in the Grand Canyon. Earth’s ancient ...

Scientists proposed an explanation for the formation of Vallis Schrödinger and Vallis Planck near the lunar south pole, which are each about the size of Earth’s Grand Canyon.

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 extraordinary formations, each comparable in size to Earth’s Grand Canyon, are hidden on the far side of the moon — the side that always faces away from Earth — near the lunar south pole ...