Grand Canyon fossils in the Bright Angel formation reveal 500M-year-old animals with dual feeding structures, reshaping ...

Standing guard over the valley, Sentinel Rock’s near-vertical north face was carved by dramatic rockfalls that split the cliffside. Weathering and erosion continue to sculpt Yosemite Valley, and ...

The Arizona deserts are some of the most spectacular vistas on earth, and you can catch a glimpse of one unique formation ...

While many rocks don’t burn, some of them do. It depends on what the rocks are made of – and that’s related to how they were formed. Rocks that burn when they get heated up are combusting. This means ...

A rock formation in the Mississippi River normally only reachable by boat is accessible by foot for the second year in a row as water levels plummet. Tower Rock juts out of the Mississippi River in ...

Beneath the cliffs of western Colorado, a billion years of geologic history unfolds—and a century-old dream of accessibility still shapes the land.

A severe drought caused a rock formation in the Mississippi River to be visible. It's a rare sight, but those wishing to see might be disappointed. The drought, this week, caused water levels near ...