Animals

• AmphibiaWeb
• Amphibian Checklist and Identification Guide
  An Online Guide for the Identification of Amphibians in North America north of Mexico"
• The Electronic Zoo
• Endangered Species - U.S. Fish and Wildlife Service
• Internet Resource Guide for Zoology
  BIOSIS, producer of Biological Abstracts and Zoological Record, maintains this extensive resource of animal-related sites.  Access by organism, subject, and title.
• Iowa NatureMapping
• Iowa's Threatened and Endangered Species Protection Program
• Iowa's Threatened and Endangered Species
• Monterey Bay Aquarium
• National Marine Mammal Laboratory's Education Website
  Learn about marine mammals and careers in marine science
• Nature and Wildlife Field Guides: Amphibians, Birds, Butterflies, Fish, Insects, Mammals, Reptiles, Spiders, Seashore creatures, Trees, Wildflowers - eNature.com
• NetVet: Veterinary Resources
• State Birds
• Virtual Creatures, Stanford University

Biology

• Introduction to the Bacteria
• BIOSCI - Bionet Electronic Newsgroup Network for Biology
• BUBL LINK/5:15: Catalogue of Internet Resources in the Life Sciences
  Extensive catalog of biology-related Internet sites, with helpful descriptions.
• CELLS alive! Menu
• INSCIGHT
  Joint project of Science magazine and Academic Press with daily news stories.   Archives included.  Discussion forum covers such topics as cloning and cancer research.
• Missouri Department of Conservation
• Resources of Scholarly Societies - Biology

Plants/Botany

• Backyard Wildlife Habitat™ Home
• Brooklyn Botanic Garden
  • Brooklyn Botanic Garden >> Invasive Plants
• Extension Publications Task Force
  Lots of good links to agricultural, wildlife, master gardener, pest management, and other information
• GIS Research to Digitize Maps of Iowa 1832-1859 Vegetation from General Land Office Township Plat Maps
• Guides to Trees and Shrubs, brought to you by TreeGuide Inc.
• Iowa Gap Analysis
• Iowa Prairie Network
  Iowa Prairie Network is a grassroots organization of over 800 members dedicated to creating awareness of and preservation of our tallgrass prairie heritage."
• Iowa's Threatened and Endangered Species Protection Program
• Midwestern Wetland Flora, Guide to Plant Species
• Native Plant Conservation Initiative
• National Agricultural Library
• National Plant Data Center
• National Wetlands Inventory
• Northern Prairie Wildlife Research Center
• NPCI - Alien Plant Working Group
• On The Prairie
• Plants National Database
• Species in Parks Flora and Fauna Database

Chemistry Resources

• Academic Info: Chemistry
• American Chemical Society: Chemcyclopedia Online
• ChemFinder Searching
• Chemical Formula Search
• Chemicool Periodic Table
• Chemie.DE: Acronyms and Abbrevations of Chemical Compound Names
• Chemistry Science Dictionary German/English - English/German
• The Periodic Table on the WWW
• Periodic Table - WebElements
• Periodic table (WebElements)
• Periodic Table of the Elements
• Professor Stein's Chemistry Helper
• Search the EMCI Chemical References Web Pages
• WebElements Periodic Table

Engineering

• History of Aerospace Engineering at Iowa State
• Science and Engineering Library, University of California, San Diego

Geology

• This Dynamic Earth:  The Story of Plate Tectonics
• A Gem of a Story Online: Archives
• Iowa Geological Survey Bureau - Iowa Department of Natural Resources)
• National Science Foundation: Geosciences
• Secrets of the Ice: an Antarctic Expedition  (from the Museum of Science, Boston)
• U.S. Geological Survey

Government Organizations

• Iowa Association of County Conservation Boards
• Iowa DNR
• Iowa DNR Geographic Information System (NRGIS)
• Iowa DOT
• Iowa Integrated Roadside Vegetation Management
• Iowa Internet Map Server
• Iowa Legislature
• National Wetlands Inventory - U.S. Fish and Wildlife Service)
• Natural Resources Conservation Service
  • Backyard Conservation
• U.S. Army Corps of Engineers
• U.S. Fish and Wildlife Service
  • U.S. Fish and Wildlife Service - Iowa
• The U.S. Legislative Branch

Human Anatomy

• Anatomy & Histology Center - Martindale's Health Science Guide
• Education World ® - Lesson Planning: The Human Body: An Online Tour
• Human Anatomy Online - InnerBody.com
• Medem: Medical Library - Anatomy and Medical Illustrations

Insects

• The Arachnology Home Page (spiders and their relatives)
• Biology and Control of Spiders, Scorpions, Centipedes and Millipedes
• Insect Drawings
• The Insects Home Page
• Insects on the Web - bugbios
• Iowa Insect Information Notes
• University of Florida's Book of Insect Records

Museums

• The Exploratorium
  The Exploratorium (in San Francisco, California) is a museum of science, art, and human perception with over 650 interactive "hands on" exhibits. Each year more than 660,000 visitors come to the Exploratorium, over 67,000 children come on field trips, and more than 500 teachers are trained here."
• The Field Museum
• Hotlist: Museums
• University of California Museum of Paleontology

Parks

• Hartman Reserve Nature Center
• Iowa Department of Natural Resources
• Iowa Prairie Network
  Iowa Prairie Network is a grassroots organization of over 800 members dedicated to creating awareness of and preservation of our tallgrass prairie heritage."
• List of State Preserves (Iowa)
• National Park Service
• U.S. Fish & Wildlife Service
• U.S. Fish & Wildlife Service - the Great Lakes-Big Rivers Region

Physics

• Center for the History of Physics
• Eric Weisstein's World of Physics
• Little Shop of Physics
• Nobel Laureates in Physics 1901 - 1998
• The Physics Classroom

Scientists

• 4000 Years of Women in Science
• Albert Einstein Online
• Einstein-Image and Impact.  AIP History Center exhibit.
• Eric Weisstein's World of Scientific Biography
• The Faces of Science: African Americans in the Sciences
• Nobel Laureates in Physics 1901 - 1998

Stars and Outer Space

• About Rainbows
• Eric Weisstein's World of Astronomy
• Iowa DNR/GSB-Meteorites in Iowa's History
• Lunar phases web tool
• NASA's Office of Space Flight
• Near Earth Asteroid Rendezvous Mission
• The Nine Planets: A Multimedia Tour of the Solar System
• Open Directory Project: Science: Astronomy
• Stars and Constellations
• Universal Guide - Star Maps and Sky Charts
• Virtual Reality Moon Phase Pictures