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Describes the earth's many ice ages, with an emphasis on the climate, people, and animals of the last great ice age.

Describes a variety of spacecraft from past, present, and future, including the early rockets, the space shuttle, and possible space stations.

Studies the important role of atmospheric ozone in protecting the Earth, and tells how man-made chemicals are causing worrisome holes in the polar ozone layers.

Presents a children's story about the elephant seal for early readers, and describes what they look like, where they live, how they care for their young, and other interesting facts.

Illustrations and easy-to-follow text teach children how electricity powers different things inside a house.

A biography of seventeenth-century Puritan Anne Hutchinson who was placed on trial and exiled from Massachusetts for openly opposing a number of Puritan beliefs.

Biographies of fifty women scientists who have made significant contributions in scientific fields, such as Marie Curie, Dian Fossey, and Margaret Mead.

Differentiates a tropical rain forest from all others, and describes its typical plant and animal life.

An introduction to the ocean describing its physical characteristics, the plants and animals that live in or near it, and its importance to life on Earth.

Presents a general description of deserts and describes specific desert plants, animals, people, and activities.

Examines the different types of grasslands and the plant and animal life they support.

Examines the different types of wetlands and the plant and animal life they support.

Describes the physical characteristics and behavior of octopuses, as well as ways in which scientists study them.

Discusses the benefits of water, and looks at the harmful effects and methods of preventing water pollution.

Presents information in simple text about different types of trains and how they work.