On the Cover
March-April 1998 Volume 86, Number 2
Cancer cells, such as the melanoma cells stained orange by
immunofluorescence in this light micrograph, divide without the usual
restraints. Tumors invade normal cells—in this case the skin's
epithelial cells, whose nuclei are stained blue. Eventually, some tumor
cells acquire the ability to metastasize, or spread to new organs. ...
Should the scientific community continue to fight rear-guard skirmishes with creationists, or insist that "young-earthers" defend their model in toto?
Evaporation from the leaves pulls water to the top of a tree, but living cells make that possible by protecting the stretched water and repairing it when it breaks
Group and representation theory make it possible to form a complete catalogue of "strut-cable" constructions with prescribed symmetries
Why are some new theories embraced as beautiful, others spurned as ugly? Progress in science may require that aesthetic ideals themselves change
The spread of cancer cells to distant sites implies a complex series of cellular abnormalities caused, in part, by genetic aberrations
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