Explores new discoveries about dinosaurs and answers such questions as "Were all dinosaurs giants?" "How are dinosaurs named?" "Which was the largest meat-eater?" and "How smart were the dinosaurs?"

Introduces forms of movement in nature and industry, discussing such sources of power as gravity, electricity, motors, and wind.

Describes aspects of rivers and lakes, including their history, benefits to humanity, pollution, and conservation.

Introduces the characteristics and behavior of the approximately 4000 species of songbirds, describing how they sing, and discussing their migration, their enemies, and their friends.