The Hallmundarhraun lava field—basalt dark, with great swells and a froth of white moss—looks like a stormy sea whipped into a frenzy and frozen in place. It begins under the Langjökull glacier in ...

A large cache of magma may have gathered just below the surface around the town of Grindavík, and it could drive a series of future eruptions. A volcanic fissure spews lava and smoke as it erupts near ...

A photo of a cave where the side walls are ribbed and lit in a butterfly pattern. Credit: Craig Bettenhausen/C&EN C&EN reporter Craig Bettenhausen was in Iceland in early October en route from the ...

With only about 7,500 residents and not a single traffic light on the entire island, Molokaʻi offers a rare glimpse of Hawaii before mass tourism transformed much of the archipelago. The absence of ...