Marshall, E. G.

Uses the Mount St. Helens and the Santorini volcanoes and the San Francisco earthquake as dramatic evidence that our planet's subterranean regions are active and continually changing. Explains the plate tectonics theory and accompanies scientists around the world as they study the boundaries between plates of the earth's crust where earthquakes and volcanoes may occur in the future.

Documents one hundred years of exploration by the National Geographic Society.

In-depth look at the elephant and its future. See man's relationship with it, how it communicates and gives birth.