It could be a scene from a horror film, but it’s not. It’s Black Mountain (Kalkajaka), a foreboding sight that rises from ...

San Gabriel Valley areas scarred by the Eaton Fire are at “high to very high risk” of debris flows this week. How do they ...

At the top of the world, there is a sea—the remains of one, at least. The summit rocks of Mount Everest, the highest ...

The rover's 26th sample, known as "Silver Mountain," has textures "unlike anything we've seen before," NASA says.

Here are the nominees for The Republic's Athlete of the Week poll, sponsored by Diamond Kitchen & Bath. Voting closes at 6 ...

A new book explores how one biologist’s work at the North and South Poles changed the way he sees the world and our place in ...

One site in Montana tucked away amidst the mountains and valleys is full of Ringing Rocks, ordinary stones turned into ...

Two gigantic canyons on the moon — both deeper than the Grand Canyon — were carved in less than 10 minutes by floods of rocks ...

Flatiron Freddy saw his shadow on Sunday at Chautauqua Park, which means that the Boulder County region can expect six more ...

Two hunting buddies hire guides to ride them into the backcountry and hunt elk and mountain goats in this story from the ...