Comprehensive online encyclopedia and database of over 51,000 entries.
A guide to more than musical 140 instruments from all parts of the world. Includes photographs and descriptions.
Online home of the Encarta encyclopedia, world atlas, dictionary, thesaurus, multimedia collection, and homework tools.
Articles explain how hundreds of things work, from elements of the human body to space-age technology.
Reference site allows you to search over the Columbia Encyclopedia, the Encyclopedia of World History, fact books, thesauri, quotes, and more.
Links to online Smithsonian resources and answers to frequently asked questions from A to Z.
An online encyclopedia with more than 400,000 pages of content.
Find articles on animal health care topics ranging from behavior and preventive care to common and not-so-common diseases.
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