Through the intricate study of lava tubes—caves formed following volcanic eruptions when lava cools down—an international team of researchers has uncovered clues about Earth's ancient environments ...

The Chauvet-Pont D'Arc cave is one of the most famous underground caverns in the world, housing one of the oldest and best-preserved collections of prehistoric cave paintings ever discovered. Now, ...

The United States has a habit of showcasing its geology. Long before cities and highways showed up, forces beneath the ...

Through the intricate study of lava tubes -- caves formed following volcanic eruptions when lava cools down -- an international team of researchers has uncovered clues about Earth's ancient ...

Editor’s note: A version of this story appeared in CNN’s Wonder Theory science newsletter. To get it in your inbox, sign up for free here. A mile and a half beneath the ocean’s surface, the seafloor ...

Oregon has no shortage of staggering natural beauty, from prominent icons like Mount Hood to under-the-radar marvels like the secret "Iceland-esque" Abiqua Falls just south of Portland. Yet Oregon's ...

“A major eruption could happen literally any day now; it’s about 50-60 years overdue.” Paulina Anna, a geologist at the aptly-named Lava Centre in Hvolsvöllur, on Iceland’s southern coast, is ...

(CNN) — A mile and a half beneath the ocean’s surface, the seafloor seems nearly as alien as the surfaces of other planets. Deep-sea volcanic ridges, formed by the collisions of tectonic plates, ...