A new study suggests the planet’s iconic domes owe their strange shape to both thick lava and a flexible surface.

The hulking rock, called Maka Lahi, is the size of a two-story house and sits on a 120-foot-tall cliff, covered in vegetation ...

Locals in Tonga had always known it as Maka Lahi, “large rock,” but scientists quickly realized it was much more.

This Cold War outpost concealed more than submarines—it hosted a devastating eruption that cooled the planet nearly 200 years ...

The 50-kilometer-wide seamount contains three dormant volcanoes, the floor of which drops more than two kilometers below the ...