DOI: 10.1126/science.3050842 , 842 (2004); 305 Science , et al. H. Y. McSween Basaltic Rocks Analyzed by the Spirit Rover in Gusev Crater This copy is for your personal, non-commercial use only. clicking here. colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to republish or repurpose articles or portions of articles ): February 2, 2011 www.sciencemag.org (this infomation is current as of The following resources related to this article are available online at http://www.sciencemag.org/content/305/5685/842.full.html version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/content/suppl/2004/08/05/305.5685.842.DC1.html can be found at: Supporting Online Material http://www.sciencemag.org/content/305/5685/842.full.html#related found at: can be related to this article A list of selected additional articles on the Science Web sites 116 article(s) on the ISI Web of Science cited by This article has been http://www.sciencemag.org/content/305/5685/842.full.html#related-urls 7 articles hosted by HighWire Press; see: cited by This article has been registered trademark of AAAS. is a Science 2004 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 February 2, 2011 www.sciencemag.org Downloaded from