Explores the universe and all of its elements, including the Milky Way, our solar system, the stars, and other astronomical bodies, and examines why it is important to continue studying the cosmos.
Text and accompanying photographs describe the history, causes, prevention, and treatment of the common cold and flu, as well as the effects on people and society.
Provides information about the sense of touch, exploring the skin senses, touch and pressure, pain, temperature senses, and touch senses in animals; and discusses the importance of touch and touch technology.
Examines global warming and the greenhouse effect, changes in earth's climate since its formation, the effects of these changes, and whether anything can be done to reverse them.
Briefly discusses the various ways plants and animals obtain and utilize food, describes the human digestive system and what happens to a roast beef sandwich when it is eaten, and explains the principles of nutrition.
Discusses the causes, symptoms, and treatments of depression, examining the different types of depression and their effects on the individual and on society.
