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Analysis of a meteorite found in northwest Africa, prosaically named NWA 7533, indicates that it is the first sample of the regolith, or 'soil', of Mars, and is derived from the
earliest Martian igneous crust yet identified. SEE LETTER p.513 Access through your institution Buy or subscribe This is a preview of subscription content, access via your institution ACCESS
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institutional subscriptions * Read our FAQs * Contact customer support REFERENCES * National Research Council. _Visions and Voyages for Planetary Science in the Decade 2013–2022_ (National
Academies Press, 2011). * Humayun, M. et al. _Nature_ 503, 513–516 (2013). Article ADS CAS Google Scholar * Agee, C. B. et al. _Science_ 339, 780–785 (2013). Article ADS CAS Google
Scholar * McSween, H. Y. Jr, Taylor, G. J. & Wyatt, M. B. _Science_ 324, 736–739 (2009). Article ADS CAS Google Scholar * Tuff, J., Wade, J. & Wood, B. J. _Nature_ 498, 342–345
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Sci._ 46, 1–20 (2011). Article ADS CAS Google Scholar Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Harry Y. McSween is in the Department of Earth and Planetary
Sciences, University of Tennessee, Knoxville, Tennessee 37996–1410, USA., Harry Y. McSween Authors * Harry Y. McSween View author publications You can also search for this author inPubMed
Google Scholar CORRESPONDING AUTHOR Correspondence to Harry Y. McSween. RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE McSween, H. A chunk of ancient
Mars. _Nature_ 503, 473–474 (2013). https://doi.org/10.1038/nature12836 Download citation * Published: 20 November 2013 * Issue Date: 28 November 2013 * DOI:
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