Mount Everest is widely recognised as Earth's highest mountain, standing as the ultimate symbol of altitude and exploration.

This video shows Sete Cidades, São Miguel Island, Azores, Portugal, where two large crater lakes sit inside a wide volcanic ...

This video shows a coastal landscape in Martinique, France, where green fields, small villages, steep ocean cliffs, and wind ...

A volcano that slept for more than 100,000 years before erupting is blowing up our understanding of when volcanoes should be defined as active or extinct. Volcanologists officially classify sleeping ...

After Mount St. Helens erupted in 1980, experts were faced with a precarious question: How can we best prepare for when—not if—the next volcanic eruption in the Cascade Range occurs? Triggered by a ...

We know, the headlines can sound terrifying. In this series, Mashable speaks with experts to bring you the unvarnished truth about science, health, threats from space, and scary-sounding creatures.

For more than 100,000 years, a Greek volcano lay silent. But deep underground, it was still growing. Tiny zircon crystals show magma was quietly brewing between eruptions, researchers report April 22 ...

Understanding what triggers large volcanic eruptions is crucial for hazard assessment, but the exact mechanism driving these eruptions is still poorly understood. The prevailing theory is that ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. Don’t freak out, but Devils Tower is moving. The 867-foot-tall rock monolith located in ...

Martian winds can have quite an impact. ESA's Mars Express has spotted them whipping up sand grains and acting as a cosmic sandblaster, carving out intriguing grooves near Mars's equator. The ridges, ...

A powerful swarm of earthquakes in January suggested one of Iceland’s giant “ice volcanoes” may be awakening after a decade of slumber. In the months that followed, more earthquakes have rocked the ...