Volcanoes have fascinated--and terrified--people for ages. They have destroyed cities and ended civilizations. John Dvorak, the acclaimed author of Earthquake Storms, looks into the early scientific study of volcanoes and the life of the man who pioneered the field, Thomas Jaggar. Educated at Harvard, Jaggar went to the Caribbean after Mount Pelee exploded in 1902, killing more than 26,000 people. Witnessing the destruction and learning about the...