• PNAS Anthropology Portal
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November 29, 2011; 108 (48)

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Cover image expansion

Cover image: Pictured is astronaut Harrison Schmitt, at Tracy’s Rock during the Apollo 17 lunar mission. The Apollo program successfully delivered rocks from the surface of the Moon to Earth, spurring the creation of state-of-the-art facilities that carried out the chemical analysis of the precious cargo. As reviewed in the special feature, further advances in laboratory technology over the past 40 years have enabled remarkable discoveries based on the analysis of extraterrestrial materials that complement telescopic and spacecraft observations. See the introduction by Glen J. MacPherson and Mark H. Thiemens for the Cosmochemistry Special Feature on pages 19130–19134. NASA photograph AS17-140-21496 (courtesy of NASA Johnson Space Center).

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