9. Britannica.Com: Encyclopedia Britannica has traditionally offered the best encyclopedia in the English speaking world. Recently they have moved all of their information to the net; most of the information is for free, though they change their minds occasionally.
10. Smithsonian Institutution Si.edu: Smithsonian is the leading source of scientific information in the US and possibly the world.
11. Google.com: You can enter any word and search through billions of web pages. A wonderful way to track down key information worldwide.
12. Askjeeves.com: A similar site put not as comprehensive in our experience.
