Presents a brief biography of explorer Christopher Columbus, the first man known to cross the Atlantic Ocean, and discusses what he found when he reached the islands now known as the West Indies.
Details the history and invention of the telephone. Examines how the telephone has helped shape the modern world and features full-color photographs, easy-to-read text, a graphic timeline, and diagrams.
Traces the history and invention of the radio and examines how modern-day versions of this device work and are used. Includes full-color photographs and a glossary.
An introduction to the skeletal system and its role in the human body, looking at the skull, spine and ribs, arms, legs, and other bones, discussing diseases of the skeletal system, and offering advice on how to keep it healthy.
An introduction to the respiratory system and its role in the human body, looking at the throat, windpipe, and lungs, discussing respiratory problems, and offering advice on how to keep lungs healthy.
An introduction to the nervous system and its role in the human body, looking at the brain, spinal cord, and nerve cells, discussing the senses, and examining things that can go wrong with the nervous system.
An introduction to the muscular system and its role in the human body, looking at different types of muscles, discussing diseases of the muscular system, and offering advice on how to keep muscles healthy.
