Digging Deeper
Are you finding that you can't find the right information for your extended essay or course work?  Maybe you need to take a look at the invisible web beneath the surface of Google and Yahoo and around 500 times larger according to Brightplanet. (http://www.brightplanet.com/) Take a look at this article and these web links.  One of them could just have the information you are looking for. 

The Invisible Web: What It Is, How You Can Find It     by , About.com Guide

Why Is The Invisible Web Important?

Perhaps you think it would be easier to just stick with what you can find with Google or Yahoo. Maybe. However, it's not always easy to find what you're looking for with a search engine, especially if you're looking for something a bit complicated or obscure. Think about the Web as a vast library. You wouldn't expect to just walk in the front door and immediately find information on the history of paper clips lying on the front desk, right? You might have to dig for it. This is where search engines will not necessarily help you, and the Invisible Web will.

Plus, the fact that search engines only search a very small portion of the web make the Invisible Web a very tempting resource. There's a lot more information out there than we could ever imagine.

How Do I Use The Invisible Web?

Fortunately for you and I, there are many other people that have asked themselves the exact same question, and have put together great sites that serve as a launching point into the Invisible Web. Here are some gateways for different subjects: 


Open Library

One web page for every book ever published. It's a lofty but achievable goal.

To build Open Library, we need hundreds of millions of book records, a wiki interface, and lots of people who are willing to contribute their time and effort to building the site.

To date, we have gathered over 20 million records from a variety of large catalogs as well as single contributions, with more on the way.

The OAIster® database

Millions of digital resources from thousands of contributors.
Available through WorldCat.org at no charge.
Contains records of digital resources from open-archive collections worldwide.
More than 23 million records representing digital resources from more than 1,100 contributors.


INFOMINE is a virtual library of Internet resources relevant to faculty, students, and research staff at the university level. It contains useful Internet resources such as databases, electronic journals, electronic books, bulletin boards, mailing lists, online library card catalogs, articles, directories of researchers, and many other types of information.

Science.gov searches over 55 databases and over 2100 selected websites from 13 federal agencies, offering 200 million pages of authoritative U.S. government science information including research and development results. Science.gov is governed by the interagency Science.gov Alliance

The WWW Virtual Library (VL) is the oldest catalogue of the Web, started by Tim Berners-Lee, the creator of HTML and of the Web itself, in 1991 at CERN in Geneva. Unlike commercial catalogues, it is run by a loose confederation of volunteers, who compile pages of key links for particular areas in which they are expert; even though it isn't the biggest index of the Web, the VL pages are widely recognised as being amongst the highest-quality guides to particular sections of the Web.