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

From witnessing active volcanoes and getting involved in community tourism to exploring stone cities that have stood for ...

Millions of people around the world live near one of the roughly 1,500 active volcanoes on Earth—from Italy’s Campi Flegrei to Indonesia’s Merapi to the United States’ Mount Rainier.

This story appears in the May 2010 issue of National Geographic magazine ... before the top 1,300 feet of the volcano—more than three billion cubic yards of mud, ash, and melting snow ...

“Glaciers cover about 12 percent of Iceland and there are quite a few volcanoes beneath ... past found almost nowhere else,” says National Geographic fellow Jonathan Tourtellot, who ...

Despite being more than 600 kilometres from the nearest volcano, the river averaged 86C. According to National Geographic, that is hot enough “to cook a small animal in seconds.” What makes it ...