ArticleFrontiers in microbiology2025
Microbes from ambient-pressure analogues offer insights into possible life in Europa's high-pressure subsurface ocean.
Article in Frontiers in microbiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Under its thick ice layer, Europa contains a shielded liquid water ocean where habitable conditions may exist. To effectively assess the habitability of this environment and the implications on putative biosignature formation, it is essential to integrate our understanding of the physicochemical conditions of the sub-surface ocean with ground-truth analysis on Earth, using both natural analogue sites and laboratory simulation experiments. This combined approach is particularly prudent for Europa, as locations proposed as natural analogues for the chemistry of Europa's ocean are predominantly located at ambient pressure (~0.1 MPa), which differs even from the shallowest depths of Europa's ocean (e.g., 20 to 30 MPa). Basque Lake No. 2, British Columbia, Canada, was used as geochemical analogue for the ice shell-ocean interface and sub-ice environment of Europa due to the Mg-Na-SO
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