Wikipedia can be a great place to begin finding information on a topic, trend, or issue. You'll need to find additional sources, but Wikipedia articles may help you learn more about your topic. Use the citation list at the bottom of Wikipedia entry pages to lead you to more sources.
Need to look up a name, place, term, or event? The sources below contain many different kinds of encyclopedias and dictionaries and are excellent starting points for getting an overview on your topic as well as possible search terms to use later. Try them.