Contains more than 200 entries covering all the major scientific developments during 4,000 years of ancient history, including biographical sketches of notable individuals...

An award winning site that features maps,chronologies, still and moving images and original scholarly articles about the pre-Hispanic archaeology of Teotihuacan, an urban center northeast of Mexico City...

A "dictionary of ancient biography, covering Greek and Roman history and politics, literature, philosophy, science, and art...