The AIDS Knowledge Base - Comprehensive text book of HIV disease. Additional chapters will be posted. Clearinghouse for AIDS related information for practitioners, patients, and others. Includes resources, social issues, state statistics, US map. American Society for Microbiology - Searchable.
Most links are to directories.
Animal Pictures Archive - More than 20,000 photos with links to other photo archives . Animal Skull Collection - A collection of images of mammal, bird, amphibian, reptile, fish and crustacean. Legend is provided as well as skull preparation information. Audubon Online Field Guides - Searchable field guides to over 4,800 plant and animal species. Biodidac Project - Biology image resource.