DOI: 10.1126/science.1148112 , 1125 (2007); 318 Science et al. Thomas R. Watters, Mars: Equatorial Ice or Dry, Low-Density Deposits? Radar Sounding of the Medusae Fossae Formation www.sciencemag.org (this information is current as of November 16, 2007 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/318/5853/1125 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/1148112/DC1 can be found at: Supporting Online Material http://www.sciencemag.org/cgi/content/full/318/5853/1125#otherarticles , 3 of which can be accessed for free: cites 20 articles This article 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 2007 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 November 16, 2007 www.sciencemag.org Downloaded from