Provides answers to commonly asked questions about space exploration, including "Which was the first living being in space?" and "Do you grow taller or shorter in space?".
A series of questions and answers provides information about the physical characteristics, senses, eating habits, life cycles, and behavior of different insects.
Lists 230 dangerous materials in the environment, explains terms used in the field, lists federal laws and agencies controlling hazardous substances, and gives government agencies and public interest organizations furnishing more information.
Traces the history of the development of the artificial heart, including experimentation with animal and human heart transplants, and discusses the psychological and ethical issues surrounding their use.
Discusses dinosaurs and different theories regarding their extinction, including climate changes, starvation, cosmic rays, and an asteroid collision with the earth.