North America's deepest gorge, Hells Canyon, which slithers along the border of Idaho and Oregon, is a surprisingly new ...

Hells Canyon, the deepest river gorge in the country, has always been a marvel for geologists, archeologists and travelers.

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

Hells Canyon, the deepest river gorge in the United States, likely got rapidly carved 2.1 million years ago when a shifting landscape in Idaho caused a giant lake to start overflowing. That's ...

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

Hells Canyon, the deepest river gorge in the United States, was carved just about 2.1 million years ago — making it much younger than the Grand Canyon. (Matthew Morriss) Hells Canyon ...