Only a few of the more general ones are listed here. The Bio Sciences page of the The WWW Virtual Library is a good starting point. You can also find excellent gateway sites hosted by colleges and universities, such as the the Stanford Biology Library's Selected Internet Resources for Biological Sciences . Sites maintained by individuals on university servers can be valuable if they are kept up to date, such as Ecology WWW page at Harvard. Professional societies, such as the Federation of American Societies for Experimental Biology and the Ecological Society of America offer information and links.
More specialized sites can provide focused searching.
A few examples are Aquatic Ecology Page , Emory University's MedWeb , Tufts University's Nutrition Navigator , the National Cancer Institute's CancerNet , the Complex Systems Virtual Library , and Neurosciences on the Internet. The AAAS Evolution Resources site contains scientific papers and other material in support of the theory of evolution. BioChemNet is a directory of biology and chemistry educational resources. Two additional health-related sites are HealthWeb and Healthfinder . A selection of more general data sources are listed here.