Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single ...

Volcanoes repeatedly remind people of Earth's potential for violence. Since 1700, volcanic eruptions have killed more than 250,000 people and devastated scores of communities. What causes these ...

(CNN) — Here's some background information about volcanoes, mountains that open downward to a reservoir of molten rock. Facts: More than 80% of the Earth's surface, both above and below sea level, is ...

From the glowing lava flows of Hawaii Volcanoes National Park to Yellowstone's spewing geysers and bubbling paint pots, our national parks provide a window into the molten interior of our planet.

AS Hawaii's Kilauea volcano continues to release lava following two weeks of violent eruptions, now is a good a time as any to explore the science behind the rocky magma-spewers. And we've gathered ...

Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET. When not wallowing in weird gear and iPad apps for cats, she can be found tinkering with her 1956 DeSoto. Mauna ...

Volcanoes are a natural part of our Pacific Northwest existence – if you lived here during the eruption of Mount St. Helens in 1980, you know that all too well. But even if you weren't here during the ...

For most people, volcanoes exist mostly in the imagination, in spectacular movie moments and baking-soda-and-vinegar school experiments. But real volcanic activity is so much cooler, packed with ...