Asimov, Isaac

Photographs and text describe what happens when the body is cut or bruised, how the body reacts to these injuries, and steps to help the healing process.

A brief discussion of sleep, why we need it, what happens when we sleep, and sleep disorders.

Text and accompanying photographs explain, in simple terms, the reasons for skin color, how it is determined by heredity, and how various environmental factors affect it.

Examines the mass extinction of dinosaurs and offers a possible explanation of the causes.

Describes the ozone layer and its ongoing destruction and explains what can be done to help solve the problem.

Defines two oceanographic terms for each letter of the alphabet from aquanaut and aquaculture to zooplankton and zoogene.

Describes the characteristics of Earth, including its origins and composition. Explains natural phenomena such as earthquakes and global warming.

Discusses constellations, galaxies, planets, and the various scientific instruments that we use to view them.

Photographs and text discuss the origins, physical makeup, and relationship to Earth of the huge star called the sun.

Explains the nature of meteors or "shooting stars" and how they are different from real stars.