The Greek island has a long history of earthquakes, but what is causing the recent series of quakes has scientists perplexed.

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.

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.