Answers approximately four hundred questions on inventions in a variety of fields, including agriculture, engineering, energy, transportation, manufacturing, medicine, and others, and includes over 250 illustrations and diagrams.
Provides information for young readers about outer space, answering questions about heavenly bodies, planets, and space exploration, with chapter quizzes and an answer key.
Provides answers to a variety of questions about the human body including "Why do you blush?", "Why do you need two ears?", "How strong is hair?", and "What are goose bumps?".