A massive boulder named Maka Lahi was recently found about 650 feet from the edge of a cliff in Tonga, and researchers believe that it may have been deposited by a tsunami around 7,000 years ago.

The N.C. Department of Transportation has narrowed its search for a place to quarry stone needed to restore the eastbound ...

Hells Canyon is the deepest river canyon in the United States. Now scientists have solved the mystery of when it formed.