The Grand Canyon still holds mysteries after billions of years in the making. Recent discoveries—from newly named rock layers ...

Arizona’s desert scenery gets wonderfully strange at this Phoenix rock landmark, where stone, sky, and silence create an ...

Identifying minerals blends careful observation with dependable tests that reveal each specimen’s unique signature. Geologists examine hardness, streak, luster, cleavage, and crystal habit to tell ...

There are aluminium-rich outcrops elsewhere on the planet and there are impacts, but I thought it was very shocking to see ...

Learn more about the bizarre geological features found throughout our Solar System.

More than a million years in the making, this gigantic chasm in the Panhandle Plains—and its remarkable hoodoos, pinnacles, ...

What appeared to be a mini-volcano erupted with fire and smoke along Santa Barbara's coast Thursday. But experts say there ...

National Geographic's Wonder Lessons will teach you how to navigate the stars, spot cloud types, recognize common trees, and ...

It was a battle environmentalists thought they had won years ago. But fracking – the controversial technology for extracting ...

Most people wrongly assume the Twelve Apostles were carved purely by wind and waves eating away at coastal cliffs.

For geology wonks and amateur collectors of minerals and fossils, the state offers a jackpot of dazzling treasures that tell ...