Potts, Steve

Provides information about Mars, discussing the size and appearance of the planet, the mysterious canals discovered on Mars, Martian atmosphere, and the history of Mars exploration.

Discusses the history, techniques, and training related to karate, judo, and kung fu.

Gives a basic introduction to karate, judo, and ninjitsu.

A brief biography of the twenty-sixth president of the United States.

A brief biography of the thirty-fifth president of the United States.

Color photos fill this overview of the planet Earth, which describes its atmosphere, surface temperature, tectonic plates, and magnetic field, and also provides a listing of related books and Web sites.

A brief biography of the thirty-second president of the United States.

Details the characteristics, habitat, and life cycle of the nine-banded armadillo.

Color photos fill this overview of Valentine's Day traditions, which tells the St. Valentine story and describes the establishment of the holiday, the first Valentines, and modern Valentines; explains how to make Valentine's Day treats; and lists related books and Web sites.

Provides information about the Thanksgiving holiday, discussing its origins, earliest celebrations, and traditions; and includes instructions for a Thanksgiving activity.