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Are we alone in the universe? This breathtaking account of the search for life-supporting planets suggests we are not.
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ALAN BOSS is a research scientist in the Department of Terrestrial Magnetism at the Carnegie Institution of Washington. He has been elected a Fellow of the American Geophysical Union, the American Association for the Advancement of Science, the Meteoritical Society, and the American Academy of Arts & Sciences. He lives in Silver Spring, Maryland.
