No force of nature is as powerful as a volcano. Volcanic eruptions have shaped Earth, changed the climate, and wiped out whole cities. Today, there are about 1,900 active volcanoes on Earth. But even a sleeping giant can rumble back to life at any time–with devastating effects. In this book, you’ll get a look at how volcanoes form, the damage they cause when they blow their tops, and what scientists are doing to predict future eruptions.