Title: Explorers
Subjects: Ocean, Ocean, juvenile literature, Earth (planet), Earth (planet), juvenile literature, Cat family (mammals), Felidae, juvenile literature, Reptiles, Reptiles, juvenile literature, Earth sciences, Earth sciences, juvenile literature, Robots, Robots, juvenile literature, Whales, Whales, juvenile literature, Dolphins, Dolphins, juvenile literature, Dinosaurs, Dinosaurs, juvenile literature, Juvenile literature, Seas, Marine ecology