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Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia e...

Health Physics Training - Both Non-Ionizing Radiation (Laser) and Ionizing Radiation

Space and astronomy news

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

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus. Infoplease.com contains facts on all subjects including sports, entertainment, techno...

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

The Atomic Archive explores the complex history surrounding the invention of the atomic bomb. Follow a timeline that takes you down the path of our nuclear past to the present. Read biographies of A-bomb father Robert Oppenheimer and Enrico Fermi