A brain transmuted into glass by the famous volcano should have been impossible. Some scientists say it still is.

The tallest volcano in Europe, Italy's Mount Etna, and the world's most active volcano, Kilauea in Hawaii, erupting again.

Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble and steam.

"Three out of every four live volcanoes on Earth are here,” says National Geographic. “Almost all earthquakes happen here, too." The Ring of Fire is the result of plate tectonics − giant ...

National Geographic has a reputation for breathtaking ... with our picks including a mesmerising picture of Guatemala’s Fuego Volcano exploding and a magnificent dune in Egypt’s vast desert.