The most dangerous volcanoes in the world can be deadly, but they rarely muster up the sheer sound that could burst eardrums. This one did, though. On 27 August 1883, a volcano named Krakatoa, nestled ...

In the predawn darkness, a team of scientists climbs the slope of Mexico's Popocatépetl volcano, one of the world's most active and whose eruption could affect millions of people. Its mission: figure ...