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Latest news and features on science issues that matter including earth, environment, and space. Get your science news from the most trusted source!

The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world

The leading source for trustworthy and timely health and medical news and information. Providing credible health information, supportive community, and educational services by blending award-winning expertise in content, community services, expert co...

Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

Discovery Health explores the human body in all its scientific and cultural aspects. Learn about diseases, wellness, medical technology and more on Di

Online Medical Dictionary and glossary with medical definitions

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The eMedicine point-of-care clinical reference features up-to-date, searchable, peer-reviewed medical articles organized in specialty-focused textbooks, and is continuously updated with practice-changing evidence culled daily from the medical literat...

Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.