Nearctica: The Natural History of North America
Comprehensive site including education, natural history, conservation, environment, ecology, evolution, geology, paleontology, and systematics.
http://www.nearctica.com/

British Council: Science
These pages guide you into UK science, engineering and technology, and environment, and list services and information produced by the British Council.
http://www.britishcouncil.org/science/science/science.htm

STN Easy
Web-based search engine that accesses more than 60 databases in the Scientific and Technical Information Network. Includes Scitech, regulatory information, MSDS, chemical inventories, toxicology, chemical suppliers, other topics.
http://stneasy.cas.org/

Strategian
Descriptions, ratings and links for a few "top internet sites" in biology, chemistry, computer science, mathematics, medicine, physics, and psychology.
http://www.strategian.com/

NovaGate
A gateway to selected resources in the fields of forestry, veterinary, agricultural, food and environmental sciences. Searchable and browsable annotated database by the libraries of the Nova University.
http://novagate.nova-university.org/

Hypography Sci-Tech
A guide to science links and technology news on the internet.
http://www.hypography.com/

STN International on the Web
An online scientific and technical information service (subscription required) that provides access to more than 200 in-depth databases in science and technology to offer direct links to the scientific literature, patents, and chemical catalogs.
http://www.stnweb.org/

A Science Bibliography
Stanford University collection of scientific resources and publications.
http://www-sul.stanford.edu/collect/science/

Science World
Links to science resources. Also includes weather links.
http://www.scienceworld.cc/

The Science Page
Links to resources in all main science areas, plus newsgroups, constants, history, teacher resources and science analogies.
http://sciencepage.org/

Eric Weisstein's Treasure Troves of Science
Online encyclopedias of astronomy, math, physics, scientific biographies, and scientific books, with many equations and formulas.
http://www.treasure-troves.com/

WebExhibits Catalogue
Something interesting, every day. Brief summaries and online reviews of an eclectic selection of science-related web sites.
http://webexhibits.org/

First Science
Portal of news, articles, games and quizzes, vidcaps and webcams, humor and poems.
http://www.firstscience.com/site/home.asp

Science Education Website
Contains to biology, chemistry, environmental, games, higher education, math, paranormal, physics, space, and technology webpages. Includes a quiz bowl and FAQ's page. Maintained by the University of Louisville.
http://sciboard.louisville.edu/

Science Resources on the Net
A selection of listings covering museums, K-12 sites, math, computer science, philosophy of science, physics, chemistry, astronomy and cosmology, biology, geology, ecology, agriculture, medicine, psychology, anthropology and archeology. Includes website search engine.
http://www.geocities.com/peterroberts.geo/

Virtual Library
Provides access to a vast array of energy, science, and technology information.
http://www.osti.gov/virtlib.html

First Gov for Science
Collection of information provided by U.S. government agencies, including research and development results.
http://www.science.gov/

Lab Finder
Searchable database for testing and calibration laboratory facilities by country and type of experiments.
http://www.labfinder.net/

Essential Science Indicators
Summaries of new developments within areas of science of key papers, authors, institutions, nations and journals. Categorized by type of media.
http://www.esi-topics.com/

Refdesk.com - Science Information Resources
Annotated collection of resource pages for chemistry, physics, technology, anthropology, biology, food science, genetics, geology, cosmology, science history, engineering, math, and related online magazines.
http://www.refdesk.com/factsci.html

Virtual Library: Science
Directory of the Virtual Library, an expert-run catalog of sections of the web, which is particularly strong in science topics.
http://vlib.org/Science

EFG's Color Reference Library
Research resource aimed toward color reference, but includes links to science, technology, and educational resources.
http://www.efg2.com/Lab/Library/?Color/Science.htm

Research in Norway (NFI)
Contains information on current and past research and development projects in the country's institutions of higher learning. Topics include the humanities, social science, maths and natural sciences, technology, medicine, agricultural and fishery specialties.
http://dbh.nsd.uib.no/nfi/english/

The Scout Report for Physical Sciences
Biweekly e-zine offers a selective collection of internet resources covering topics in the sciences, and related fields such as math and engineering, that have been chosen by librarians and content specialists in the given field of study.
http://scout.wisc.edu/Reports/NSDL/PhysSci/Current/

Honest Intellectual Inquiry into Science
Includes categorized links to general science, anthropology, archaeology, astronomy, biology, genetics, evolution, chemistry, physics, climatology, computers, ecology, geology, mathematics, medicine, and paleontology.
http://www.intellectual-inquiry.com/sci.htm

Europartnersearch.net
Databases of European research institutes and companies for partner search within the frame of research projects.
http://www.europartnersearch.net/