1. Ancient Technologies and Archaeological Materials :: http://www2.uiuc.edu/unit/ATAM/index.html  Looks at archeometry, a fusion of archeology, art history, museology, and the natural and physical sciences. This is an informative, professional resource that provides a fascinating and realistic glimpse into the real-world work of those involved in deciphering the past using modern scientific methods.
2. Animal Info: Rare, Threatened & Endangered Mammals – http://www.animalinfo.org
3. APIRS ONLINE: Aquatic, Wetland, and Invasive Plant Database - http://plants.ifas.ufl.edu/search80/NetAns2
4. Ask A Scientist/Oracle :: http://www.seps.org/cvoracle/  You can use the CVOracle to ask a scientist a question. This site offers a list of questions that other people have asked (along with the answers), student notes, an FAQ, a link to sign up to answer questions, links to other ask-a-scientist sites and links to other science sites in general.
5. Australian Science and Technology on the Internet :: http://www.nla.gov.au/oz/sciencew.html  Extensive list of links to Australian science organizations, conference, journals, and libraries; divided into subject disciplines.
6. Bio-DiTRL - http://bio-ditrl.sunsite.ualberta.ca
7. BioMedCentral - http://www.biomedcentral.com  Over 100 Open Access Journals
8. Canada Institute for Scientific and Technical Information :: http://cisti-icist.nrc-cnrc.gc.ca/cisti_e.shtml  CISTI is one of the world's major sources for information in all areas of science, technology, engineering and medicine.
9. Cell Line Data Base - http://www.biotech.ist.unige.it/interlab/cldb.html
10. ChemPlace  http://www.awl.com/chemplace/
11. CiteSeer - http://citeseer.ist.psu.edu/cis  “Scientific Literature Digital Library”
12. Classic Papers from the History of Chemistry http://dbhs.wvusd.k12.ca.us/webdocs/Chem-History/Classic-Papers-Menu.html
13. Cognitive Sciences Eprint Archive http://cogprints.org/view/subjects/bio.html

collection of approximately 670 academic papers.

14. Conversion Factors :: http://www.wsdot.wa.gov/Metrics/factors.htm  This site lists conversion relationship between U.S. customary units and SI (International System) units. It gives conversion factors for commonly needed values -- area, length, pressure, force, and volume -- as well as gage standards for things such as sheet metal, wire, and pipes and measures of hardness, stress, and temperature.
15. Conversion of Units :: http://www.chemie.fu-berlin.de/chemistry/general/units.html  A forms based utility that converts values in one unit to any other.
16. Dictionary of Measures, Units and Conversions :: http://www.ex.ac.uk/cimt/dictunit/dictunit.htm  This provides a summary of most of the units of measurement to be found in use around the world today (and a few of historical interest), together with the appropriate conversion factors needed to change them into a 'standard' unit of the S.I.
17. Dictionary of Scientific Quotations :: http://naturalscience.com/dsqhome.html  Published by naturalSCIENCE, an independent online journal, this is a list of famous science-related quotations, in order by the name of the person to whom the quote is attributed.
18. Dictionary of Units of Measurement :: http://www.unc.edu/~rowlett/units/  This dictionary includes all units of the International System (SIPM), many other units of the metric system, and those English Customary Weights and Measures (British and American) that are accurately defined.
19. Directory of Research Systematic Collections Database: National Biological Information Infrastructure - http://159.189.176.70/drsc.asp
20. DNA Patent Database - http://dnapatents.georgetown.edu
21. Eisenhower National Clearinghouse Resource Finder :: http://www.enc.org/resources/  Large, searchable collection of math and science resources for K-12 instruction.
22. eNature - http://www.enature.com/guides/select_group.asp Field Guides to Plants and Animals
23. E-print Network - http://eprints.osti.gov
24. Eric's Treasure Troves of Science :: http://www.treasure-troves.com/  Contains detailed articles about various topics within the fields of astronomy, chemistry, math, music, physics, and more.
25. e-Skeleton Project – http://www.eskeletons.com
26. Exploratorium's Ten Cool Sites! :: http://www.exploratorium.edu/learning_studio/sciencesites.html  Every month this site puts up listings of ten new science sites that they have reviewed and thought worthy of investigation. Previous choices are available in a subject-organized archive.
27. Fishbase: A Global Information System on Fishes - http://www.fishbase.org/home.htm
28. FORMIS: A Master Bibliography of Ant Literature - http://cmave.usda.ufl.edu/~formis/
29. FS INFO Database - http://fsinfo.fs.fed.us/cgi-bin/gw_43_0/chameleon  The Forest Service Information Database
30. GrayLit Network - http://graylit.osti.gov  "A Science Portal to Technical Reports"
31. HighWire Press :: http://highwire.stanford.edu/  One of the 2 largest free full-text science archives on Earth. Scientific journals are made available online, some free, some by subscription, many searchable with abstracts available.
32. How Products Are Made :: http://www.madehow.com/  Come to this site and learn about the manufacture of things as diverse as chewing gum, blue jeans, vacuum cleaners, paint, fireworks, refrigerators, and artificial snow. This online encyclopedia contains 7 volumes of different items.
33. How Stuff Works :: http://www.howstuffworks.com/  How Stuff Works is a great place to come to learn about how things work in the world around you. Have you ever wondered how the engine in your car works, or what gears do, or what makes the inside of your refrigerator cold? A new article gets added every week. Sections include: Engines & Motors; Around the House; Electronics; Things You See In Public; Basic Technologies; Computers; Understanding Digital Technology; Food; and Your Body.
34. How Stuff Works Express :: http://www.express.howstuffworks.com/  Provides explanations of science and technology concepts and objects to teens and children.
35. Insect Bibliography Server - http://entobib.unl.edu
36. International Plant Names Index - http://www.ipni.org/index.html
37. ISIHighlyCited.com - http://www.isihighlycited.com  Highly Cited Researchers in a Range of Fields
38. Kimball’s Biology Pages (An Online Biology Text) http://biology-pages.info
39. Life Science Dictionary :: http://biotech.icmb.utexas.edu/pages/dictionary.html  Most of the 8300+ terms deal with biochemistry, biotechnology, botany, cell biology and genetics. We also have some terms relating to ecology, limnology, pharmacology, toxicology and medicine.
40. MagPortal.com: Magazine Articles on Science & Technology :: http://www.MagPortal.com/c/sci/  A searchable, browsable directory of magazine articles on research, scientific thinking, and laboratories that are available online. Topics covered include: Biology & Life Sciences; Chemistry; Engineering; Environment & Geology; Future Trends; Mathematics; Paranormal & Hoaxes; Physics; Psychology; Space & Astronomy. Updated every few days.
41. MedBioWorld http://www.sciencekomm.at/home/lists/medtutorials.html
42. Museums Universally Supporting Education and Entertainment :: http://www.musee-online.org/  Use this site to link to 37,000 museums around the world, organized by subject or browsed alphabetically. MUSEE offers free information to museum lovers around the world as well as providing services and advocacy to museums.
43. Naked Scientists Online :: http://www.thenakedscientists.com/  The Naked Scientists Online Internet Science Radio show utilizes streaming technology to allow you to hear science, medicine and technology news, discoveries and breakthroughs being discussed by scientists and researchers, and includes interviews with famous scientists of world-class reputation. The site also contains an online science discussion forum, science, medicine and technology news, medical and health advice, science educational resources including science articles, science experiments, science projects, science book reviews, and archived on-demand internet science radio.
44. Nanotech Marketplace :: http://www.nanotech-marketplace.com/  A portal for Nanotechnology information, products and product derivatives.
45. National Image Library (U.S. Fish & Wildlife Service) - http://images.fws.gov
46. NCSTRL - http://sunsite.berkeley.edu/NCSTRL  Networked Computer Science Technical Reports Library
47. NEPIS - http://www.epa.gov/nepis - Environmental Protection Agency Documents
48. NEWTON's Ask A Scientist archive :: http://www.newton.dep.anl.gov/archive.htm  An archive of questions received and answers composed through NEWTON's Ask A Scientist service for K-12 students and educators.
49. Nobel Channel :: http://www.nobelchannel.com  A very informative web site that brings to life those that have won the Nobel Prize with movies and audio of speeches. While this site is a work in progress, it has the history of how the prize began, as well as information on all of the categories that the prize is given and some of the winners.
50. Nobel Prize Internet Archive :: http://www.almaz.com/  Impressive collection of information about all of the past Nobel Laureates, organized by prize and year, or searchable. Entries include brief biographical information plus links to related Internet sites.
51. NSC Crossroads :: http://www.crossroads.nsc.org/  A safety, health and environment search engine and news network that uses subject area experts to answer questions and guide you to information and resources on the Web. The Crossroads Web site was created by the National Safety Council to provide safety, health and environmental (SHE) managers unbiased information, tools and contacts they need to be better informed about SHE issues.
52. NTRS: NASA Technical Reports Server - http://ntrs.nasa.gov Public Access to NASA’s Technical Literature
53. On Being A Scientist: Responsible Conduct In Research :: http://www.nap.edu/readingroom/books/obas/  A booklet on ethics and values in scientific research, prepared by the National Academy of Sciences.
54. Organic Eprints - http://orgprints.org

55.   PhilSci Archive - http://philsci-archive.pitt.edu The PhilSci Archive is "an electronic archive for preprints in the philosophy of science.”  There are over 825 full-text items in the archive at present.

56. Plant Fossil Record Database - http://www.biodiversity.org.uk/ibs/palaeo/pfr2/pfr.htm 
57. Plant Image Gallery - http://www.noble.org/imagegallery/
58. Preprints and Working Papers – http://www-sul.stanford.edu/depts/physics/research/preprints.html
59. PrimateLit - http://primatelit.library.wisc.edu
60. Princeton BBS Preprint Archive - http://www.bbsonline.org/bbsprints.html The

Princeton Behavioral and Brain Sciences Preprint Archive contains a searchable

61. PSIgate: Physical Sciences Information Gateway :: http://www.psigate.ac.uk/newsite/  PSIgate aims to provide high quality Internet resources for students, researchers and practitioners in the physical sciences, specifically in: astronomy, chemistry, earth sciences, physics, and science history and policy.
62. PubMed Central - http://www.pubmedcentral.nih.gov - Search Full-Text Life Science Database
63. Regional Inversion :: http://www.regionalinversion.com/index.htm  The site is dedicated to economic development, regional change, economic geography, and regional science.
64. ResearchIndex :: http://citeseer.nj.nec.com/cs  This site indexes scientific information that is freely available over the internet.
65. ScaleNet - http://www.sel.barc.usda.gov/scalenet/scalenet.htm
66. Scholarly Societies Project :: http://www.lib.uwaterloo.ca/society/overview.html  This site contains a searchable database of links to and information about international academic and scholarly societies. Societies are indexed in a subject guide or can be found by searching by name or abbreviation.
67. SciCentral :: http://www.scicentral.com/  SciCentral, which opened in June 1997, is a metadirectory of science and engineering resources conceived and created by professional scientists. The aim of SciCentral is two-fold: to aid the science community by enabling direct and efficient access to only the most valuable internet resources, and to prepare a platform for communication between scientists and engineers so that they may work together to solve the complex research problems confronting us today. The searchable Gateway provides access to over 50,000 sites in 150 science specialties.
68. SciELO - Scientific Electronic Library Online :: http://www.scielo.br/  SciELO - Scientific Electronic Library Online is a collection of Brazilian scientific journals in electronic format. The objective of the site is to implement an electronic virtual library, providing full access to a collection of serial titles, a collection of issues from individual serial titles, as well as to the full text of articles. The access to both serial titles and articles is available via indexes and search forms.
69. Science Learning Network :: http://www.sln.org/  The Science Learning Network (SLN) is an online community of educators, students, schools, science museums and other institutions demonstrating a new model for inquiry science education. Funded by the National Science Foundation and Unisys Corporation, this site includes links to many excellent sites designed for children and science educators.
70. Science Linkhouse :: http://www.linkkitalo.fi/  Science Linkhouse, formerly the Finnish Virtual Library, is a subject gateway for the scientific community. It contains descriptions of Internet resources in a number of different general subject areas. The site displays in Finnish, but an English translation is available.
71. Science Service Historical Image Collection :: http://americanhistory.si.edu/collections/scienceservice/  The Science Service historical image collection represents twentieth-century scientific research consisting of images and their original captions as they appeared in period publications. The captions were written by Science Service journalists and have been transcribed exactly.
72. Science Textbooks and Historical Science Online http://www.ntu.edu.au/education/ online.htm
73. Science.gov - http://science.gov  “A Gateway to Authoritative Selected Science Information”
74. Sciences Explorer :: http://library.thinkquest.org/11771/  Science-related resources in mathematics, physics, biology and chemistry; including at-home experiments, interactive activities and selected, annotated links to other Internet sites. Searchable.
75. Scientific American: Ask the Experts :: http://www.sciam.com/askexpert_directory.cfm  The world's leading researchers and academics to tackle those questions that used to leave your high school science teacher in a cold sweat. There are nine broad categories to browse and the opportunity to pose your own scientific brain-benders.
76. Sci-Philately :: http://ublib.buffalo.edu/libraries/asl/exhibits/stamps/  A Selective History of Science on Stamps.
77. SCIRUS - http://www.scirus.com/srsapp  Science-Specific Search Engine
78. SciTechResources.gov :: http://www.scitechresources.gov/  A catalog of government science and technology resources.
79. Senate Committee on Commerce, Science, and Transportation :: http://commerce.senate.gov/  The Senate Committee on Commerce, Science, and Transportation reviews proposed legislation, messages, petitions, memorials, and other matters.
80. SIMBAD Astronomical Database - http://simbad.u-strasbg.fr/Simbad 
81. Sport! Science@The Exploratorium :: http://www.exploratorium.edu/sports/  Learn about the science behind sports, including ice hockey, balls, and rock climbing. Also includes a sports science links and bibliography section, and the opportunity to ask a question about sports and science.
82. Statistical Reports of U.S. Science and Engineering :: http://www.nsf.gov/sbe/srs/stats.htm  A wealth of surveys, reports, and statistics on the sciences. Surveys describe the workforce and current educational trends in science.
83. STINET - http://stinet.dtic.mil  Science and Technology Database of Information
84. Technocapitalism :: http://www.technocapitalism.com/  This website explores the complexities of technocapitalism which is the interface between technology, society, and economics. Articles explore the potential of this new field and propose questions for researchers and students.
85. Technology Administration, United States Department of Commerce :: http://www.ta.doc.gov/  The Technology Administration (TA) is the only Federal agency working to maximize technology's contribution to America's economic growth. Here you will find information about our programs, services, press releases, publications, and speeches.
86. Temperature Conversion Calculator :: http://www.cchem.berkeley.edu/ChemResources/temperature.html  Calculates conversions to/from degrees Kelvin, Celsius, Farenheit, Reamur, and Rankine scales.
87. Ultrasonics Ferroelectrics Frequency Control :: http://www.ieee-uffc.org/fcmain.asp  Research essays and review papers dealing with the History of Frequency Control and Timekeeping and tutorials dealing with clocks and oscillators.
88. UMass Astronomy Theses http://www-astro.phast.umass.edu/theses
89. UNEP-WCMC Conservation Databases - http://www.unep-wcmc.org/index.html?http://www.unep-   wcmc.org/cis/~main
90. Urban Forestry - http://forestry.lib.umn.edu/bib/urban.phtml
91. USPTO Web Patent Databases :: http://www.uspto.gov/patft/index.html  This page is the starting point for the USPTO's free searchable patent databases, which cover the period from 1 January 1976 to the most recent weekly issue date.
92. Victorian Web: Science http://65.107.211.206/victorian/science/texts.html
93. WebExhibits :: http://webexhibits.org/  WebExhibits helps you find high quality exhibits on the internet and focuses on illustrated educational exhibits, not just references. Exhibit sites range in subject from the ancient world to science and technology, and from the creative arts to health and medicine.
94. Why Files: The Science Behind the News :: http://whyfiles.org/  The Why Files, a project [originated by] the National Institute for Science Education, is an electronic exploration of the science behind the news.
95. World Biodiversity Database - http://www.eti.uva.nl/tools/wbd.php