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  • 1
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    A low temperature transfer of ALH84001 from Mars to Earth (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-10-29
    Description: The ejection of material from Mars is thought to be caused by large impacts that would heat much of the ejecta to high temperatures. Images of the magnetic field of martian meteorite ALH84001 reveal a spatially heterogeneous pattern of magnetization associated with fractures and rock fragments. Heating the meteorite to 40 degrees C reduces the intensity of some magnetic features, indicating that the interior of the rock has not been above this temperature since before its ejection from the surface of Mars. Because this temperature cannot sterilize most bacteria or eukarya, these data support the hypothesis that meteorites could transfer life between planets in the solar system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weiss, B P -- Kirschvink, J L -- Baudenbacher, F J -- Vali, H -- Peters, N T -- Macdonald, F A -- Wikswo, J P -- New York, N.Y. -- Science. 2000 Oct 27;290(5492):791-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Geological and Planetary Sciences, 170-25, California Institute of Technology, Pasadena, CA 91125, USA. bweiss@gps.caltech.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11052940" target="_blank"〉PubMed〈/a〉
    Keywords: Crystallization ; *Exobiology ; Magnetics ; *Mars ; *Meteoroids ; Temperature
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Life in ice-covered oceans (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gaidos, E J -- Nealson, K H -- Kirschvink, J L -- New York, N.Y. -- Science. 1999 Jun 4;284(5420):1631-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Geology and Planetary Sciences Division, California Institute of Technology, Pasadena 91125, USA. gaidos@gps.caltech.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10383341" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; Ecosystem ; *Exobiology ; Extraterrestrial Environment ; Hydrogen ; *Ice ; Iron/metabolism ; *Jupiter ; Methane/metabolism ; Oceans and Seas ; Oxidation-Reduction ; Oxygen ; Sulfur/metabolism ; Temperature ; Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Paleomagnetic evidence of a low-temperature origin of carbonate in the Martian meteorite ALH84001 (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-03-14
    Description: Indirect evidence for life on Mars has been reported from the study of meteorite ALH84001. The formation temperature of the carbonates is controversial; some estimates suggest 20 degrees to 80 degrees C, whereas others exceed 650 degrees C. Paleomagnetism can be used to distinguish between these possibilities because heating can remagnetize ferrimagnetic minerals. Study of two adjacent pyroxene grains from the crushed zone of ALH84001 shows that each possesses a stable natural remanent magnetization (NRM), implying that Mars had a substantial magnetic field when the grains cooled. However, NRM directions from these particles differ, implying that the meteorite has not been heated significantly since the formation of the internal crushed zone about 4 billion years ago. The carbonate globules postdate this brecciation, and thus formed at low temperatures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kirschvink, J L -- Maine, A T -- Vali, H -- New York, N.Y. -- Science. 1997 Mar 14;275(5306):1629-33.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Geological and Planetary Sciences, California Institute of Technology, 170-25, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9054354" target="_blank"〉PubMed〈/a〉
    Keywords: Carbonates/*chemistry ; Magnetics ; *Mars ; *Meteoroids ; Minerals/*chemistry ; Temperature
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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