Life on Mars: Evidence from Martian Meteorites
New data on martian meteorite 84001 as well as new experimental studies show that thermal or shock decomposition of carbonate, the leading alternative non-biologic explanation for the unusual nanophase magnetite found in this meteorite, cannot explain the chemistry of the actual martian magnetites....
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ftnasantrs:oai:casi.ntrs.nasa.gov:20090038980 2023-05-15T14:05:05+02:00 Life on Mars: Evidence from Martian Meteorites Wentworth, Susan J. Gibson, Everett K., Jr. McKay, David S. Clemett, Simon J. Thomas-Keptra, Katie L. Spencer, Lauren Unclassified, Unlimited, Publicly available [2009] application/pdf http://hdl.handle.net/2060/20090038980 unknown Document ID: 20090038980 http://hdl.handle.net/2060/20090038980 Copyright, Distribution as joint owner in the copyright CASI Life Sciences (General) JSC-CN-19247 2009 ftnasantrs 2019-07-21T06:36:34Z New data on martian meteorite 84001 as well as new experimental studies show that thermal or shock decomposition of carbonate, the leading alternative non-biologic explanation for the unusual nanophase magnetite found in this meteorite, cannot explain the chemistry of the actual martian magnetites. This leaves the biogenic explanation as the only remaining viable hypothesis for the origin of these unique magnetites. Additional data from two other martian meteorites show a suite of biomorphs which are nearly identical between meteorites recovered from two widely different terrestrial environments (Egyptian Nile bottomlands and Antarctic ice sheets). This similarity argues against terrestrial processes as the cause of these biomorphs and supports an origin on Mars for these features. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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unknown |
topic |
Life Sciences (General) |
spellingShingle |
Life Sciences (General) Wentworth, Susan J. Gibson, Everett K., Jr. McKay, David S. Clemett, Simon J. Thomas-Keptra, Katie L. Spencer, Lauren Life on Mars: Evidence from Martian Meteorites |
topic_facet |
Life Sciences (General) |
description |
New data on martian meteorite 84001 as well as new experimental studies show that thermal or shock decomposition of carbonate, the leading alternative non-biologic explanation for the unusual nanophase magnetite found in this meteorite, cannot explain the chemistry of the actual martian magnetites. This leaves the biogenic explanation as the only remaining viable hypothesis for the origin of these unique magnetites. Additional data from two other martian meteorites show a suite of biomorphs which are nearly identical between meteorites recovered from two widely different terrestrial environments (Egyptian Nile bottomlands and Antarctic ice sheets). This similarity argues against terrestrial processes as the cause of these biomorphs and supports an origin on Mars for these features. |
format |
Other/Unknown Material |
author |
Wentworth, Susan J. Gibson, Everett K., Jr. McKay, David S. Clemett, Simon J. Thomas-Keptra, Katie L. Spencer, Lauren |
author_facet |
Wentworth, Susan J. Gibson, Everett K., Jr. McKay, David S. Clemett, Simon J. Thomas-Keptra, Katie L. Spencer, Lauren |
author_sort |
Wentworth, Susan J. |
title |
Life on Mars: Evidence from Martian Meteorites |
title_short |
Life on Mars: Evidence from Martian Meteorites |
title_full |
Life on Mars: Evidence from Martian Meteorites |
title_fullStr |
Life on Mars: Evidence from Martian Meteorites |
title_full_unstemmed |
Life on Mars: Evidence from Martian Meteorites |
title_sort |
life on mars: evidence from martian meteorites |
publishDate |
2009 |
url |
http://hdl.handle.net/2060/20090038980 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
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CASI |
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Document ID: 20090038980 http://hdl.handle.net/2060/20090038980 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766276731047510016 |