A dictionary subsite of Wikipedia, the popular Internet user-based encyclopedia. Written in a simple English format for students with limited English reading abilities, Wiktionary uses easy words and very short sentences. Browse entries...

A dictionary subsite of Wikipedia, the popular Internet user-based encyclopedia. Written in a simple English format for students with limited English reading abilities, Wiktionary uses easy words and very short sentences. Browse entries...

Brief overview on the history and theory of migration of the first inhabitants of North America. Links to Wikipedia for definitions are embedded in the text.

Citizendium is similar to Wikipedia, an online encyclopedia where the public edits articles. In this article, an overview of Jefferson's life and political views are provided.

This site provides detailed history and star cluster location information for each zodiac constellation. Also includes links (mostly to Wikipedia pages) to additional information for keywords that appear in the articles.