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The Chemical Heritage Foundation (CHF) fosters an understanding of chemistry?s impact on society. An independent, nonprofit organization, CHF maintains major collections of instruments, fine art, photographs, papers, and books. We host conferences an...

Princeton University is a vibrant community of scholarship and learning that stands in the nation's service and in the service of all nations.

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

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Chemistry: Foundations and Applications: A-Ar, Ar-Bo, Bo-Ce, Ce-Co, Co-Di, Di-Fa, Fe-Ge, Ge-Hy, Hy-Kr, Kr-Ma, Ma-Na, Ne-Nu, Ny-Pi, Pl-Pr, Pr-Ro, Ru-Sp, St-Te, Te-Va, and Va-Z

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 ...

The world's second largest organization of physicists, APS publishes physics journals and organizes meetings.

Beliefs create mental barriers and have caused violence, ignorance, and intolerance. Do we need to believe at all?

Eric Weisstein

MIT is devoted to the advancement of knowledge and education of students in areas that contribute to or prosper in an environment of science and technology.