Scirus - for scientific information
Search engine that fetches only scientific websites.
www.scirus.com/

Science Search Engines
Science search engines, portals, and directories. ... SciNet Science Search - Delve into this science search engine and directory, which allows users to ...
www.searchengineguide.com/pages/Science/

Entrez cross-database search
Simultaneously search multiple life sciences databases at the National Center for Biotechnology Information (NCBI).
www.ncbi.nlm.nih.gov/Entrez/

1000 Specialized Search Engines - Science
Over 1000 fully specialized search engines within 50 categories are waiting to assist you - all easy to use.
www.virtualfreesites.com/search.science.html

SciSeek :: Science Search Engine and Directory
Science search engine and directory. Also provides forums, tools and related news.
www.sciseek.com/

Science Search Engines - All the Science Search Engines
A Directory of all the worlds search engines and directories.
www.search-engine-index.co.uk/Reference/Science_Search/

Beaucoup! Science, Nature, & Technology
Claims 'Earth's Biggest Environment Search Engine'; Sydney Math Search ... "all areas of psychology as well as cognitive science, neuroscience, ...
www.beaucoup.com/1scieng.html