Life on Mars - How it disappeared (if it was ever there)
Information available on Mars chemistry suggest that conditions on early Mars may have been suitable for life. This paper examines the possible events that led to the disappearance of life, assuming it existed, from the surface of Mars. The sequence of events leading to life extinction on early Mars...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19890064152 2023-05-15T14:04:33+02:00 Life on Mars - How it disappeared (if it was ever there) Friedmann, E. Imre Koriem, Ali M. Unclassified, Unlimited, Publicly available JAN 1, 1989 http://ntrs.nasa.gov/search.jsp?R=19890064152 unknown http://ntrs.nasa.gov/search.jsp?R=19890064152 Accession ID: 89A51523 Copyright Other Sources 55 Planetary Biology and Origins of Life, 20th, 21st, and 23rd, Espoo, Finland, July 18-29, 1988) Advances in Space Research; 167-172 1989 ftnasantrs 2012-02-15T18:07:18Z Information available on Mars chemistry suggest that conditions on early Mars may have been suitable for life. This paper examines the possible events that led to the disappearance of life, assuming it existed, from the surface of Mars. The sequence of events leading to life extinction on early Mars assumes the following steps: (1) a decrease of temperature and humidity levels, leading to a selection of microorganisms for tolerance of low temperatures and arid conditions; (2) further deterioration of environment leading to withdrawal of cold-adapted organisms to protected niches under the surface; (3) further cooling producing heavy stresses in these organisms; and (4) further deterioration of the environment resulting in extinction. This sequence of events is considered parallel events documented for the microbial community in the Ross Desert of Antarctica, where TEM examinations of the material detected progressive stages of cell damage and death. Other/Unknown Material Antarc* Antarctica NASA Technical Reports Server (NTRS) |
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55 Friedmann, E. Imre Koriem, Ali M. Life on Mars - How it disappeared (if it was ever there) |
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55 |
description |
Information available on Mars chemistry suggest that conditions on early Mars may have been suitable for life. This paper examines the possible events that led to the disappearance of life, assuming it existed, from the surface of Mars. The sequence of events leading to life extinction on early Mars assumes the following steps: (1) a decrease of temperature and humidity levels, leading to a selection of microorganisms for tolerance of low temperatures and arid conditions; (2) further deterioration of environment leading to withdrawal of cold-adapted organisms to protected niches under the surface; (3) further cooling producing heavy stresses in these organisms; and (4) further deterioration of the environment resulting in extinction. This sequence of events is considered parallel events documented for the microbial community in the Ross Desert of Antarctica, where TEM examinations of the material detected progressive stages of cell damage and death. |
format |
Other/Unknown Material |
author |
Friedmann, E. Imre Koriem, Ali M. |
author_facet |
Friedmann, E. Imre Koriem, Ali M. |
author_sort |
Friedmann, E. Imre |
title |
Life on Mars - How it disappeared (if it was ever there) |
title_short |
Life on Mars - How it disappeared (if it was ever there) |
title_full |
Life on Mars - How it disappeared (if it was ever there) |
title_fullStr |
Life on Mars - How it disappeared (if it was ever there) |
title_full_unstemmed |
Life on Mars - How it disappeared (if it was ever there) |
title_sort |
life on mars - how it disappeared (if it was ever there) |
publishDate |
1989 |
url |
http://ntrs.nasa.gov/search.jsp?R=19890064152 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19890064152 Accession ID: 89A51523 |
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Copyright |
_version_ |
1766275727092613120 |