A recent study from the University of New Mexico has proposed a fascinating theory about the formation of the Grand Canyon.

A meteor may have led to the formation of the Grand Canyon, a new study has found. While many Americans are familiar with the Grand Canyon’s beauty and uniqueness, they may not be aware of the story ...

Karl Karlstrom, a geologist recently retired from the University of New Mexico, grew up in Flagstaff, Arizona. Grand Canyon ...

Two of Arizona's most famous landmarks may be linked by cosmic violence: the asteroid that gouged out Meteor Crater may have also caused the formation of an ancient lake in the Grand Canyon. This ...

View from the Grand Canyon's South Rim onto Nankoweap Delta. Remnants of a past natural dam created by a landslide are visible on the far side of the Colorado River, just to the left of the dry bed of ...

When high-velocity asteroids land on Earth, they can form a meteor impact crater. Such collisions have occurred throughout Earth's history and still occur on other planetary bodies today. While most ...

Researchers discovered a new field of ancient tektites in South Australia, revealing a long-forgotten asteroid impact. These ...

More than a decade after mysterious holes were first discovered in the permafrost of Western Siberia, scientists are still putting forward new theories – from gas explosions to meteor impacts – on how ...