A&E Biography Online
Archaeology Magazine
Britannica.com
Everything2
Ham Radio DX Reference Guide
Heavens Above
The Hitchhiker's Guide to the Galaxy
How Stuff Works
Invention & Technology
Insects on the Web
ISO
Martindale's Reference Desk
Nature
National Geographic
Ohio Public Library Information Network
The Old Farmer's Almanac
Open Directory Project
Probert Encyclopaedia
Refdesk.com
Scientific American
The Smithsonian Institute
Smithsonian Magazine
Uncle John's Bathroom Readers' Institute
Urban Legends Reference Pages - snopes
World Flag Database
