A severe worker shortage in national parks across the country, which have been under budget and understaffed for years, has ...

The Cambrian-age Tonto Group is a set of rocks famous for holding clues to the burst of new life that reshaped Earth 500 ...

At first glance, the desert landscape of Southern Utah seems like a sweeping, sun-baked canvas — wide open and endless. But ...

Everything’s bigger in the US, they say, and that apparently includes its river gorges. But don't be fooled by its grand size ...

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

Hells Canyon, which is on the border between Oregon and Idaho, is almost 8,000 feet deep. That makes it far deeper than the famous Grand Canyon of Arizona, which reaches a depth of about 6,000 ...