Add even more depth to your research than just the usual search engines.
Google, the largest search database on the planet, currently has around eight billion web pages indexed. That's a lot of information. But it's nothing compared to what else is out there.
Google can only index the visible web, or searchable web. But the invisible web, or deep web, is estimated to be 500 times bigger than the searchable web. The invisible web comprises databases and results of specialty search engines that the popular search engines simply are not able to index.
Have you heard of:
- Intute - A searchable database of trusted sites, reviewed and monitored by subject specialists.
- INFOMINE - A virtual library of Internet resources relevant to university students and faculty. Built by librarians from the University of California, California State University, the University of Detroit-Mercy, and Wake Forest University.
- Librarians' Internet Index - A search engine listing sites deemed trustworthy by actual human librarians, not just a Googlebot.
- Deep Web Search Engines
- Books Online
- Economic and Job Data
- Finance and Investing
- General Research
- Government Data
- Law and Politics
- Library of Congress
- Medical and Health
See all Topics