It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Full text of the best-known, most authoritative and comprehensive encyclopedia online. Includes time lines for many subjects, videos and links to reliable sources.
"Background Information to Start Your Research," a collection of hundreds of reference books on a broad range of subjects from over 70 of the world's leading academic publishers.
