DOI: 10.1126/science.279.5354.1184 , 1184 (1998); 279 Science et al. Eric E. Gard, the Atmosphere Direct Observation of Heterogeneous Chemistry in www.sciencemag.org (this information is current as of June 24, 2009 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/279/5354/1184 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/279/5354/1184#otherarticles , 3 of which can be accessed for free: cites 19 articles This article 137 article(s) on the ISI Web of Science. cited by This article has been http://www.sciencemag.org/cgi/content/full/279/5354/1184#otherarticles 3 articles hosted by HighWire Press; see: cited by This article has been http://www.sciencemag.org/cgi/collection/atmos Atmospheric Science : subject collections This article appears in the following http://www.sciencemag.org/about/permissions.dtl in whole or in part can be found at: this article permission to reproduce of this article or about obtaining reprints Information about obtaining registered trademark of AAAS. is a Science 1998 by the American Association for the Advancement of Science; all rights reserved. The title Copyright American Association for the Advancement of Science, 1200 New York Avenue NW, Washington, DC 20005. (print ISSN 0036-8075; online ISSN 1095-9203) is published weekly, except the last week in December, by the Science on June 24, 2009 www.sciencemag.org Downloaded from