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Publisher's Summary

In this April 2004 issue of Scientific American, the cover story takes a look at glial cells and asks the question, "Has Science Missed the Other Half of the Brain?" Then, is it possible that too much choice actually makes people miserable? Barry Schwarz takes a look at what too many options can do. The third article this month looks for hidden members of planetary systems. And, finally, new research on genes may provide clues about evolution.
Want more Scientific American? You can listen to previous issues by clicking on archives under periodicals.
©2004 Scientific American

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