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Chemistry is the study of matter and energy and the interactions between them. Get facts for the elements in the periodic table. Find chemistry demonstrations and experiments and science fair projects. Get chemistry homework help with worked example ...

Great source of health articles, optimal wellness products, and free natural health newsletter of top medical news by Dr. Joseph Mercola

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Reporting our world daily: original nature and science coverage from National Geographic.

CDC Centers for Disease Control and Prevention - Your Online Source for Credible Health Information

Independent news on natural health, nutrition and more

Smart ways to live well with info and tips from experts on weight loss, fitness, health, nutrition, recipes, anti-aging & diets from Prevention Magazine.

Product reviews and Ratings on cars, appliances, electronics and more from Consumer Reports.

Breaking science news and articles on global warming, extrasolar planets, stem cells, bird flu, autism, nanotechnology, dinosaurs, evolution -- the latest discoveries in astronomy, anthropology, biology, chemistry, climate & environment, computer...

CBS News brings you the latest breaking world news, national news, political, business and entertainment news, as well as stories from 60 Minutes and the Early Show.

Environmental Working Group (EWG) works to protect kids from toxic chemicals in our food, water, air and the products we use every day. We use research to help create federal policies that protect our children, our health, and our natural resources.