Abstract
GEOCHEMISTRYOn page [447][1] of this issue of Science , researchers report that they have failed to find a single speck of the unaltered, so-called presolar material thought to abound in icy comets in the dust sample that the Stardust spacecraft returned from comet Wild 2 in January 2006. [1]: http://www.sciencemag.org/cgi/content/short/319/5862/447
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