Abstract：
:Several observations indicate that the cloud deck of the venusian atmosphere may provide a plausible refuge for microbial life. Having originated in a hot proto-ocean or been brought in by meteorites from Earth (or Mars), early life on Venus could have adapted to a dry, acidic atmospheric niche as the warming planet lost its oceans. The greatest obstacle for the survival of any organism in this niche may be high doses of ultraviolet (UV) radiation. Here we make the argument that such an organism may utilize sulfur allotropes present in the venusian atmosphere, particularly S(8), as a UV sunscreen, as an energy-converting pigment, or as a means for converting UV light to lower frequencies that can be used for photosynthesis. Thus, life could exist today in the clouds of Venus.
journal_name
Astrobiologyjournal_title
Astrobiologyauthors
Schulze-Makuch D,Grinspoon DH,Abbas O,Irwin LN,Bullock MAdoi
10.1089/153110704773600203keywords:
subject
Has Abstractpub_date
2004-04-01 00:00:00pages
11-8issue
1eissn
1531-1074issn
1557-8070journal_volume
4pub_type
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