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Describes the characteristics of the many species of crabs and briefly discusses their commercial importance.

Explains all about goldfish - how they swim, what they eat, how they breathe and answers the questions of young goldfish owners: Can they hear? Where are their ears? What are their fins for? How do the scales grow?

A simple discussion of coral animals and the various theories developed to explain how coral reefs and atolls form.

Provides information about weather, including weather instruments used and how to interpret weather maps.

Concise introduction to the natural wonders, rocks, minerals, wildlife, plants, Indians, history, and recreation of the Rocky Mountain region

Presents information obtained from manned and unmanned lunar probes about the surface, atmosphere, and interior of the moon.