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Science  30 Jun 2000:
Vol. 288, Issue 5475, pp. 2279
DOI: 10.1126/science.288.5475.2279b

Corpus to cosmos. Bone up on body parts with the classic Gray's Anatomy, or read Einstein's popular explanation of his ideas in his 1920 Relativity: The Special and General Theory at this site posting free online books. Other science tidbits can be gleaned from an online encyclopedia and book of quotations.

Jell-O science. So-called “sol-gel” chemistry involves drying a solution into a gel to make everything from glasses to insulators and biomaterials. The Sol-Gel Gateway offers articles on new research and methods, a researcher directory, links to tutorials and books, and forums.

Crossing the channel. This Web textbook on nerve impulses is packed with interactive simulations of ion channels—the proteins that shuttle ions across the nerve cell membrane. Click to see demos of diffusion across membranes, a propagating action potential, sodium and potassium channels in action, and more. Reach related sites through the linked ion channel Web ring.

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