Aprimordial origin of terrestrial hydrocar-bons and a source of them at great depth, providing food for a vigorous microbiology at shallower depths—this is the viewpoint for which much evidence has been presented here. It is clear, however, that additional confirmation of the deep-earth gas theory and the deep hot biosphere theory will be required before they become generally accepted. Several types of investigations can be undertaken to acquire such confirming evidence.
KeywordsLiquid Water Hydrogen Sulfide Methane Hydrate Martian Atmosphere Planetary Body
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