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Discusses the different types of rocks, their properties, and how they form.

Discusses the characteristics, eating habits, and offspring of reptiles, one of the main groups in the animal kingdom.

Describes early models, major parts, and the workings of delivery trucks.

Discusses the plants, animals, and climate of an ocean ecosystem.

Discusses the characteristics, eating habits, and offspring of amphibians, one of the main groups in the animal kingdom.

Describes the Hubble Space Telescope and its role in space exploration.

Describes the physical characteristics, hunting methods, and distribution of scorpions and their relationship with humans.

Describes the history of Bill Gates's Microsoft Corporation and its impact on the computer industry.

Provides an introduction to hyenas describing their physical characteristics, habitat, young, food, predators, and relationship to people.

A brief introduction to alligators, discussing their characteristics, range, habitat, food, offspring, and dangers. Includes a range map, life cycle diagram, and amazing facts.