File:407310main jsc2009e243551.jpg

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English: This is a scanning electron microscope (SEM) image of a series of partly filled pits on the surface of a mineral grain from Nakhla. Similar pits are sometimes found on Earth minerals which have been exposed to microbial attack. They are interpreted as etch features caused by organic acid generated by microbes and their biofilms. The pits in the Martian minerals are partly filled with debris, possibly the clay-like remains of organic microbes.
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来源 http://www.nasa.gov/centers/johnson/home/mars_meteorite.html
作者 NASA/David McKay

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Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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当前2009年12月2日 (三) 11:222009年12月2日 (三) 11:22版本的缩略图1,280 × 1,024(286 KB)KGyST{{Information |Description={{en|1=This is a scanning electron microscope (SEM) image of a series of partly filled pits on the surface of a mineral grain from Nakhla. Similar pits are sometimes found on Earth minerals which have been exposed to microbial a

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