Examines the history of the mammoths that roamed parts of Europe, Asia, and North America; and discusses how they adapted to various climates and what caused them to die.
Explains what happens to the earth before and during a volcanic eruption, and describes several historic eruptions, including Mount Saint Helens in 1980.
Tells the story of the discovery of a strange fish in South Africa in 1938 which was identified as a coelacanth fish believed to have become extinct along with the dinosaurs, and discusses subsequent efforts to learn about the coelacanth and the mysteries that remain unsolved.