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.


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    Titel :

    Life on Mars - How it disappeared (if it was ever there)


    Beteiligte:


    Erscheinungsdatum :

    01.01.1989



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Life on Mars: How it disappeared (if it was ever there)

    Friedmann, E.Imre / Koriem, Ali M. | Elsevier | 1989


    Mars Exploration: Was There Ever Life?

    van Zyl, Jakob | NTRS | 2013


    Echinostomiasis: A Disease that Disappeared

    W. P. Carney / M. Sudomo / Purnomo | NTIS | 1979