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    Mars Extant Life: What's Next? Conference Report

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    Author
    Carrier, B.L.
    DasSarma, S.
    DasSarma, P.
    Date
    2020
    Journal
    Astrobiology
    Publisher
    Mary Ann Liebert
    Type
    Article
    
    Metadata
    Show full item record
    See at
    https://doi.org/10.1089/ast.2020.2237
    Abstract
    On November 5-8, 2019, the "Mars Extant Life: What's Next?" conference was convened in Carlsbad, New Mexico. The conference gathered a community of actively publishing experts in disciplines related to habitability and astrobiology. Primary conclusions are as follows: A significant subset of conference attendees concluded that there is a realistic possibility that Mars hosts indigenous microbial life. A powerful theme that permeated the conference is that the key to the search for martian extant life lies in identifying and exploring refugia ("oases"), where conditions are either permanently or episodically significantly more hospitable than average. Based on our existing knowledge of Mars, conference participants highlighted four potential martian refugium (not listed in priority order): Caves, Deep Subsurface, Ices, and Salts. The conference group did not attempt to reach a consensus prioritization of these candidate environments, but instead felt that a defensible prioritization would require a future competitive process. Within the context of these candidate environments, we identified a variety of geological search strategies that could narrow the search space. Additionally, we summarized a number of measurement techniques that could be used to detect evidence of extant life (if present). Again, it was not within the scope of the conference to prioritize these measurement techniques-that is best left for the competitive process. We specifically note that the number and sensitivity of detection methods that could be implemented if samples were returned to Earth greatly exceed the methodologies that could be used at Mars. Finally, important lessons to guide extant life search processes can be derived both from experiments carried out in terrestrial laboratories and analog field sites and from theoretical modeling.
    Keyword
    Astrobiology
    Biosignatures
    Life detection
    Life in extreme environments
    Mars extant life
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086419715&doi=10.1089%2fast.2020.2237&partnerID=40&md5=00ff6eb13d357b4e73bd555003c9af44; http://hdl.handle.net/10713/13136
    ae974a485f413a2113503eed53cd6c53
    10.1089/ast.2020.2237
    Scopus Count
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    UMB Open Access Articles 2020

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