Introduces young readers to the importance of wetland areas to the Earth's ecosystem, and discusses threats against areas such as the Everglades and the Arcata Marsh and Wildlife Sanctuary, along with the efforts to restore and protect wetland areas.
Examines the dangers of infections, infestations, and diseases, describing how infections and disease are spread, and discussing treatment and prevention options, along with ways to eliminate emerging diseases before they can reach a population.
Explains what fossils are, describes the two main kinds of fossils and how they form, and discusses how fossils are discovered and what they reveal about the history of life on Earth.