Explores the religion of the Norsemen, focusing on how particular gods and goddesses were part of, and honored in, the everyday lives of the Viking people.
Examines the world's food production in both developed and undeveloped countries, the technological advances in farming, irrigation practices, famines, and the use of chemicals verses organic farming.
Examines some of the many different ways in which human activity is endangering wild animals, discussing habitat destruction, hunting, and pollution, and looks at what individuals can do to save endangered species.
Traces the process of scientific discovery in the field of geology from ancient times into the twenty-first century, introducing some of the people who have contributed to the field, and including maps, charts, and illustrations.
An exploration of air that discusses what it is, the atmosphere, air pressure, wind, the Earth's gases, air pollution, and more; and includes related activities.
Presents a short study of the skeleton and how it works to support the body, and describes how it provides protection for vital organs of the body, how to keep the bones in good shape, and much more.
