Describes the causes and disastrous effects of tidal waves, as well as a history of the most devastating ones around the world, including the December 2004 tsunami.

Explore the theory of place tectonics and learn how volcanoes develop, including 1,500 active sites around the world today. See how volcanic eruptions created the Hawaiian Islands and destroyed the island of Montserrat. Monitor Mexico's Paracutin volcano. Witness the devastation of Mt. St. Helens. Take a terrifying, but fascinating, look at these violent forces that shape our planet.