The view from Mars and Venus

Details The view from Mars and Venus The view from Mars and Venus

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977scis...17...10m&link_type=abstract

The Sciences, vol. 17, Mar.-Apr. 1977, p. 10-13.

Biology

Extraterrestrial Life, Mars Surface, Planetary Surfaces, Planetology, Space Exploration, Venus (Planet), Earth Atmosphere, Exobiology, Mars Atmosphere, Venera Satellites, Venus Atmosphere, Viking Lander Spacecraft

Scientific paper

Surface features of Mars and Venus observed and recorded close-up in recent space-probe experiments (Viking and Venera missions) are compared to anomalous features of the earth (which presumably formed originally much like its sister planets) to assess the overall effect of life processes in comparative planetary evolution. Compared to Mars and Venus, the earth exhibits 'too much' free breathable oxygen, too much nitrogen, hydrogen, and oxygen-reactive hydrocarbons, and 'too little' sulfuric acid, surface nitrate, CO2, and atmospheric acid. Biogenic replenishment of highly reactive hydrogen-rich substances (ammonia, methane, other organics and hydrocarbons) in the presence of oxygen is contrasted with the biologically inhospitable atmospheres and conditions of Mars and Venus. Biogenic earth surface anomalies (petroleum and coal strata, coral reefs, banded Fe-rich oxygen-poor alternating iron formations) and bio-stabilized temperatures are discussed.

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