Reviews all aspects of reproduction and genetics in animals, plants, microorganisms, and humans, and discusses the importance of chromosomes, genetic engineering, and animal life cycles.
Offers children an overview of the ancient Aztec and Mayan civilizations, discussing their daily life, beliefs, practices, and impact on world history.
Profiles the countries and independencies of South America and Oceania, providing information about the geography, history, and economy of each, as well as a data file, map, flag illustration, and photographs.
An illustrated reference guide to the geographies, histories, and economies of the countries in North America that provides data files, maps, and country flags.
Provides information about great scientists and their contributions to philosophy, invention, and engineering. Includes essential facts and intriguing details.
