Britannica Online

The Discovery Channel Online

The National Geographic Society Online

Biographies
15,000 biographies of notable personalities from antiquity to the present.
Video clips from A&E's Biography. A biography anagram game.
A terrific site with lots of information!

The Encyclopedia Mythica
an on-line encyclopedia on mythology, folklore, mysticism, and more.

Atlapedia Online
facts, figures and statistical data on geography, climate, people, religion,
language, history, economy & more..for each individual country