Christine Taylor-Butler

Simply describes the functioning of the digestive system and explains the process of digestion.

Describes the various parts of the human circulatory system and explains how and why blood is circulated throughout the body.

Describes the requirements and duties of the President of the United States as well as notable presidents throughout American history.

Human beings first set foot on the moon on July 20, 1969, marking one of the most important events in the history of space exploration. Since then, scientists have continued to learn more about Earth's sole natural satellite. Readers will learn what it is like to walk on the surface of the moon and what role the satellite plays in the solar system. They will also find out how scientists first began studying the moon and how they are continuing their...

Describes the various parts of the human respiratory system and explains how that system brings fresh oxygen into the body and carries carbon dioxide to the lungs to be expelled.

Introduces the planet Uranus, discusses its history, its composition, and its role in the solar system.

Discusses how hydrologists study weather patterns and the shape of the land to predict how water will move around Earth.

Provides an online resource describing the creation and ratification of the Bill of Rights, explains what rights are, and discusses the rights it guarantees, such as freedom of speech. Contains a related video, images, Web links, and text.

Discusses the life and accomplishments of Rosa Parks.

Provides information on the history of computers, from how they were first invented to how they impact our lives today.