This hidden geological layer, located between 254 and 410 miles (410 and 660 kilometers) beneath the Earth’s surface, covers ...

The Yellowstone region's Beartooth Mountains feature some of the most ancient rocks in North America — as old as 3.96 billion ...

And thanks to the Cowiche Canyon Conservancy, an area once deemed “absolutely worthless” has become one of the Valley’s ...

X” really does mark a spot in Sybille Canyon along Wyoming Highway 34, but it doesn’t mark the site of buried treasure. It’s ...

The Perseverance rover has found some intriguing samples on the red planet. Here's what they might reveal about the origins ...