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Chemical reaction     A chemical catastrophe. Thousands of U.S. gulf-war veterans complain about fatigue, memory loss and aching joints. They call it gulf war syndrome. Meanwhile, the use of agent orange in Vietnam continues to afflict Americans and Vietnamese alike. From Chemical weapons http://whyfiles.org/025chem_weap/

Microbes: What Doesn't Kill them Makes them Stronger     Overuse antibiotics and bacteria can become resistant to them. But could use of household disinfectants cause the same problem? That's what a New Jersey high school student suspects. From Antibiotic resistance http://whyfiles.org/038badbugs/

Endocrine disrupters     Are synthetic chemicals causing hormonal chaos? Disrupting our endocrine systems, and those of wildlife? From Endocrine disrupters http://whyfiles.org/045env_hormone/

Flu season     Dealing with one tricky and deadly virus. When a three-year-old boy died of influenza in Hong Kong last May, scientists tracking the shifty flu virus took notice. Had an old killer returned to the march? From Got the flu? http://whyfiles.org/049flu/

One pill makes you smaller     Fast Fat Fixes. Will these pills make you smaller - or sicker? Could fat help? CLA. fen-phen. Leptin. DHEA. From Quick fixes for obesity http://whyfiles.org/051fat_fixes/

Multiple births     Coping with septuplets and learning from twin research. The rate of triplet births rose 200 percent between 1980 and 1994. The so-called "supertwins" - triplets and up - are becoming almost common. From multiple A, B, C's http://whyfiles.org/053multi_birth/

Defying death     Caloric restriction and antioxidants may help you live longer. The only reliable way to extend the lifespan of rodents, spiders, guppies and water fleas is to drastically cut calories without skimping on essential nutrients. It's a technique scientists call undernutrition without malnutrition. From Live longer and prosper http://whyfiles.org/057aging/

Real live killers: biological weapons     Meet the microscopic killers. Biological weapons use pathogens - viruses, fungi or bacteria - or toxins made by these organisms. Theoretically, bio-weapons could kill thousands of soldiers and civilians alike. From Sickening tactics http://whyfiles.org/059bio_war/

Alternative medicine     The uneasy relationship between conventional and alternative medicine. Some charts and data on types of medical treatments. From Alternative medicine under the microscope http://whyfiles.org/076alt_med/

Ella's first year     A Father's Day special from LIFE magazine. Photographer Richard Baker documents his daughter's first year. From ELLA'S FIRST YEAR http://www.life.com/Life/essay/ella/

Andes Expedition: Searching for Inca Secrets     Virtual autopsy of the ice maiden that was killed five hundred years ago as a sacrifice to the gods in the Inca empire. The maiden's body preserved remarkably well. There is also a description of the expedition to the Andes led by Johan Reinhard, aimed to discover more Inca religious sites. Attractive graphics, but limited content. From Andes @ nationalgeographic.com http://www.nationalgeographic.com/andes/index.html

Everest: Measure of a Mountain     Scientists and climbers are using the global positioning system (GPS) and radar to measure the height of Mount Everest. Learn about the body's reaction to heights and read the latest dispatches from people trying to climb the highest mountain in the world. From Everest @ nationalgeographic.com http://www.nationalgeographic.com/everest/index.html

Surviving AIDS     Cutting edge AIDS research, and what scientists are learning about preserving the immune system and marshalling the body's natural defenses against HIV to keep infected people from progressing to AIDS. Contains a description of the body's immune system both in text and Shockwave format, QT movies illustrating the HIV life cycle, information on a vaccine research. Also contains six world maps indicating the effect of HIV on different continents and populations. Companion site to television show. Somewhat difficult to use. From NOVA Online | Surviving AIDS http://www.pbs.org/wgbh/nova/aids/

Coma     Head injury can lead to coma, learn what options doctors have available to them in preventing and treating coma. Also, get a "translation" of a medical dialogue from a TV show "Chicago Hope." The web site is very much text based. From NOVA Online | Coma http://www.pbs.org/wgbh/nova/coma/

Everest the Search for Mallory and Irvine     Follow an actual expedition to Mt. Everest, and look for evidence that two British climbers could have reached the highest point thirty years prior to Sir Edmund Hillary and Tenzing Norgay, who are known to hold the honor since 1953. Contains narration and interviews with experts. Poorly organized. From NOVA Online | Lost on Everest http://www.pbs.org/wgbh/nova/everest/

Truth About Impotence     Common causes of impotence, and views. Features an interview with Dr. I. Goldstein about possible cures. From NOVA Online | The Truth About Impotence http://www.pbs.org/wgbh/nova/impotence/

Warriors of the Amazon     Learn about shamans of the Amazon and how they use plants to make medicines. From NOVA Online/Warriors of the Amazon http://www.pbs.org/wgbh/nova/shaman/

Chemicals and Human Health     Explore the world of renal toxicology, and learn the effect of metals on the kidneys. Discover ways chemicals can affect human health. Review lung anatomy and learn about diseases of the lungs, and environmental tobacco smoke. From The Biology Project: Chemicals & Human Health http://www.biology.arizona.edu/chh/

Sweet lure of Chocolate     History of chocolate. Follow the chocolate-making process from its source in the Amazon rain forest to the chocolate factory. Science of chocolate, and the latest research into the possible health effects of its consumption. Why does chocolate make us feel so good? From Exploratorium Magazine: Chocolate http://www.exploratorium.edu/exploring/exploring_chocolate/

The Brain Eater     What causes Mad Cow disease? Is there a new type of infectious agent - a prion - that's responsible? What happens when science faces an unknown pathogen, and what are the implications for public health? Explore these questions and more. Limited content. From NOVA Online | The Brain Eater http://www.pbs.org/wgbh/nova/madcow/

Visible Embryo     Illustrates the 23 stages occurring in the first trimester of pregnancy and every two weeks of the second and third trimesters. Use the spiral to navigate through the 40 weeks of pregnancy and preview the unique changes in each stage of human development. From Visembryo http://www.visembryo.com/baby/

Seeing, Hearing, and Smelling the World     Research and articles on the three best-known human senses: vision, hearing and smelling. Learn how humans see, how we hear and how we smell. From Seeing, Hearing and Smelling the World http://www.hhmi.org/senses/

Cut to the Heart     Anatomy of the human heart, and the history of heart surgery. Look at pictures of hearts affected by an illness. From NOVA Online | Cut to the Heart http://www.pbs.org/wgbh/nova/heart/