In a study published earlier this month, Karlstrom and Grant estimated there is at least 81 cubic kilometers — or three times ...

Millions of years ago, our early ancestors roamed an area of Africa known as the Cradle of Mankind, scouring the landscape in ...

The moon may still be geologically active, judging from the way the lunar far side is wrinkling as the moon contracts. At ...

A 1997 U.S. Geological Survey study found that many sinkholes in the Hurricane area result from groundwater erosion causing ...

Some of the volcanic rocks are up to 6 million years old, while others were left by eruptions that happened as recently as a few thousand years ago, according to the Global Volcanism Program at ...

Iceland has seen some major volcanic activity in the last couple of years. Travel expert Rick Steves has some advice for ...

An enormous water reservoir — likely the largest aquifer of its kind in on Earth — sits inside the volcanic rocks of the Oregon Cascades, scientists have revealed. A hidden reservoir of ...

The chemical makeup of mineral inclusions preserved in impact glass hints at the site of a missing impact crater.

When this pressure is released, for example as a result of plate movement, magma shoots to the surface causing a volcanic eruption. Above the ground the liquid rock is called lava and as it cools ...

Disaster response units deployed as tremors of up to magnitude four rock popular holiday destination every few minutes ...