Mount St. Helens -- What is a volcano? -- Layers of earth -- Kinds of volcanoes -- Eruptions -- Other dangers -- How volcanoes help -- From lava to land -- Dormant volcanoes -- Geothermal energy -- ...

Volcanoes are a powerful force of nature. There are about 1500 active volcanoes on our planet right now. A volcano is an opening in the Earth's crust that allows lava and other volcanic matter to ...

Stephen Smith is a managing editor for CBSNews.com based in New York. A Washington, D.C. native, Steve was previously an editorial producer for the Washington Post, and has also worked in Los Angeles, ...

Io, one of Jupiter’s Galilean satellites, is the most volcanically active body in the solar system. Images from spacecraft have shown molten lava erupting along walls that dam giant lava lakes and ...

A spending freeze could disrupt systems that warn communities when eruptions appear imminent. By Raymond Zhong When the fuming and rumbling at Mount Spurr, a giant volcano northwest of Anchorage, ...

NASA scientists say the images provide far more than just a striking never-before-seen view of the Martian geography. Studying the features detailed in Odyssey's photos could help NASA prepare for ...