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 ...

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 ...

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, ...

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 ...

A mysterious pit on the flank of an ancient volcano on Mars has generated excitement recently because of what it could reveal beneath the surface of the Red Planet. Here's what that means. First ...

(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, ...