DNA Interactive - This terrific site commemorates the fiftieth anniversary of the discovery of the structure of DNA. You'll find an interactive timeline, learn how the code was cracked, find out how the discovery of the structure of DNA changed the field of biology, and see a chilling section on eugenics. By Cold Spring Harbor Laboratory, Dolan DNA Learning Center. You’ll the Flash Player Player.

The Geee! in Genome - "With more than 200 richly illustrated and interactive pages, The Geee! In Genome Web site invites visitors to learn about genes, stem cells, GMOs, cloning and the diversity of life. Primarily targeted at high school students and teachers, there are curriculum-based educational resources, ethical debates, interactive games and opinion polls." You'll need the free Flash Player for some of the site. By the Canadian Museum of Nature.

Brains Rule! - "The place to learn about your brain in cyberspace." You can play interactive games, ask questions for brain experts to answer, and meet a neuroscientist. Lesson plans are also available. You will need the free Flash Player for some features. From Creighton University.

Tree of Life - This collaborative Web project, produced by biologists from around the world, provides information about the diversity of organisms on Earth, their history, and characteristics.

Way Cool Surgery - Designed for middle and high school students, this site has videos of surgeons performing heart surgery, patient case histories, information about different medical careers, and information about heart disease prevention.

MicroAngela's Electron Microscope Image Gallery - This site is a collection of beautiful electron microscope images of insects, parasites, cells, pollen, and more. They have been lovingly colorized to enhance your viewing pleasure.

DNA from the Beginning - Immerse yourself in the field of genetics! Animations, video interviews, an image gallery, and problems to solve make this site a fun and great place to learn genetics!

Madagascar: Biodiversity and Conservation - Learn why Madagascar is such a special place. Visit this simple, yet informative site that hosts terrific photos of the diverse and amazing plant and animal life on Madagascar!

Extreme 2000: Voyage to the Deep - Join scientists on a deep-sea expedition! They are searching for organisms that have never before been seen! This site is rich with videos, photos, and multimedia learning tools. You will need the QuickTime Player to enjoy all the features on this site.

Sighting the First Sense - Great site! Worth Seeing! Learn about vision through interactive demonstrations, illustrations, and photos. You will need the free Flash Player to view some elements of this site.

Brain Connection: The Brain and Learning - This is an excellent site about the brain and learning! You will find articles, brain building activities (for kids and adults), animations of brain processes, a library, a gallery, an anatomy section and more. You will need the free Flash Player and Shockwave Player for the activities and animations.

Organ Farm - Frontline reports on the controversial topic of xenotransplantation, the transplantation of genetically modified pig cells and whole organs into human beings. You can watch videos of people who have been subjects in cutting edge studies, learn about the risks and animal welfare concerns, and form your own informed opinions on this provocative subject. You will need the free RealPlayer to view the interviews.

Bio Interactive - There are lots of activities and animations to learn from at this terrific science site! For example, you can visit virtual labs to examine patients and learn how to diagnose their cardiac diseases. Through interactive demos, you can find out how some fish use electricity to navigate. You can also watch beautiful animations that illustrate topics from infection of human cells by microbes to how the heart functions.

Genetic Science Learning Center - Learning genetics is fun at the Genetic Science Learning Center! At this site you can build your own DNA molecule online, discover what makes a firefly glow, and get the recipe for extracting DNA out of any living thing using household items. They also feature sections on genetic disorders and genetics in society.

Anatomy of the Human Body by Henry Gray - This is the online version of the classic, Gray's Anatomy of the Human Body. This is a great place for learning anatomy with over 13,000 entries and over 1,200 images. The site is searchable by key word and is also organized by subject.

Comparative Mammalian Brain Collections - At this site you can "see and download photographs of brains of over 100 different species of mammals (including humans) representing 17 mammalian orders." You can also learn about brain evolution, how the brain specimens are collected and prepared, and the importance of comparative mammalian brain research.

Glossary of Genetic Terms - by the National Human Genome Research Institute: Division of Intramural Research - Learn the language of genetics! Listen to geneticists explain important genetic terms and view diagrams to help you understand human genetics.

eNature.com: Bringing Nature to Life - By the National Audubon Society - This site features online field guides of over 4800 species. Each guide has color photos and data about the species. There is also an advanced bird finder that can help you identify a bird based on features such as its habitat, feather color, and body shape.

Alien Empire - Learn about insects through cool, interactive Flash presentations, video clips, and games at this very fun and educational site.

Bug Bios - This site offers an entomological insect database complete with photos and descriptions. There's also an online cultural entomology digest with articles that explore the role of insects in human culture, and an excellent butterfly wing learning unit that covers their structure, design analysis, pattern formation, and adaptational benefits.

Virtual Anatomy Project - This site has excellent movies that take you inside of body structures, such as a heart valve and the trachea.

Insecta Inspecta World - At this cool site you can learn the science of insects and examine insects in art, history, and much more. The was built by junior high school students under the review of the Smithsonian's National Museum of Natural History.

Herpes Simplex Virus - This site has excellent flash animations detailing the stages of Herpes Simplex Virus replication.

DNA for Dinner - In this online activity, students are asked to analyze the issues surrounding genetic engineering of food, and to decide whether these types of food crops should be labeled for consumers.

Neuroscience for Kids -This site is loaded with fun experiments and activities. Start with "Brain Basics" and then explore other topics. Very comprehensive.

Gene School '99 - This site offers a basic but thorough tour of genetics, from the Mendelian basics up through cloning and gene therapy.

Epidemic! The World of Infectious Disease - Ever wonder why some microbes are harmless, while others can be deadly? This detailed and provocative site is the on-line version of the temporary exhibition at the American Museum of Natural History.

The New England Centenarian Study - Have you ever wondered how long you will live? What it takes to live to the age of 100? This site collects the resources from a study conducted by the Harvard Medical School, offering a fascinating look into the process of aging, and the possibilities for increased longevity.

Virtual Creatures - New web technologies are offering us new ways of seeing ourselves, the world around us, and the creatures that share that world.

Nature Sound Studio - Want to hear what the Pine Barrens Tree frog sounds like? This amazing site is the work of Lang Elliot, who has collected amazing wildlife sounds from all over the world. Excellent audio quality and great images create a wonderful, immersive experience.

Vesalius Interactive Anatomy - This beautiful resource offers detailed interactive models of human anatomy to the medical community, but it is fascinating and educational for a general audience as well.

The Virtual Cell - This ambitious site presents an interactive, animated exploration of the cell, along with a good virtual textbook.

Simulation of Digital Holography - Navigate through amazing 3-D images of human anatomy. The text descriptions are a bit dry, as the site is intended for a medical audience, but the images are too cool to miss.

HMS Beagle - This magazine-format site is an excellent upper-level source for news and information about developments in biology, biotechnology, and medicine. Registration is required, but it's free.

DNA: the Instruction Manual for All Life - Aimed at a younger audience, this site offers a good basic introduction to the workings of DNA, with a clear, colorful design.

Exploring Marine Ecosystems Online - This guide to the Smithsonian's Marine Ecosystems exhibit is an excellent ecology site in its own right. It free QuickTime Player VR tours of the exhibit hall, classroom activities, and a lot more.

The Biotechnology Information Center - A searchable site that contains information on many aspects of agricultural biotechnology. The site also contains bibliographies, including one for educators.

The Virtual Body - A well-executed interactive tour of the human body put together by health insurance giant Columbia/HCA. This site requires the Shockwave Player to view.

The Natural History of Genes - Learn how enzymes digest food, or how an arm is genetically different from a leg. This thorough site explores DNA and genetics in the real world, with excellent sections on hands-on experiments and teacher activities.

The Visible Embryo - Follow the first four weeks of an embryo's development. The site uses images and Shockwave to demonstrate the process.

The Astrobiology Web: Life in Extreme Environments - Discover how scientists study the possibility of life on other planets by studying life in harsh environments on earth.

Virtual Cell - An interactive journey through a plant cell. Read the "About Virual Cell" before you begin to understand the controls. This site doesn't require any special plug-ins or browsers.

BioChemNet - An impressive collection of links to biology and chemistry sites. The site has few graphics (which is good!) allowing you to easily navigate to the fifteen categories provided.

Center for Human Simulation - See 3-D models of the human body reconstructed from slices from a cadaver. This is a standard tool for medical education. Not for the squeamish.

Arachnology -This page calls itself "The Arachnological Hub of the World Wide Web," and once you visit you'll see why. The site contains tons of information on spiders and their relatives. Check out the "Pictures and Movies" section. It gave me the creeps!

Primate Handedness and Brain Lateralization - What does handedness have to do with brain lateralization? Click and find out! This site also has a list of "Famous Left-Handers."

The Butterfly Zone - This site discusses how to attract butterfies to your garden, what butterflies are in your region, advice on starting your own garden, and experts' tips and suggestions.

Wildflowers - The purpose of this site is to organize wildflower information in one place and to identify other related WWW resources.

National Zoological Park Home Page - A well presented and informative site, it contains educational games and a Real Audio lecture center. If you visit, check out the "Think Tank."

The Garry Laboratory: WWW Virology Servers - Looking for ebola, herpes, hantavirus? This site has got 'em, or information on them anyway. This comprehensive page lists servers for general virology, specific viruses, microbiology, AIDS, emerging viruses, electronic journals, scientific societies, government sites and much, much more.

MendelWeb Homepage -The site itself does a good job of explaining itself. "MendelWeb is an educational resource for teachers and students interested in the origins of classical genetics, introductory data analysis, elementary plant science, and the history and literature of science."

Cells Alive - Ever want to see video of white blood cells attacking an invader? This site's got it, along with information on viruses, bacteria, human cells, and parasites. More tiny beasties than you can shake a syringe at!

The Visible Human Project - Navigate through a human cadaver using the "Caltech Interactive Volume Browser." Fascinating, but a bit gross.