The Green and Red Planet: A Physiological Study of the Possibility of Life on Mars

able active adapt air spaces altitude amount animals appear astronomers atmosphere atom Aviation Medicine bacteria become biological body boil called carbon dioxide cells cent chemical chemoautotrophs climate cold comparable corresponding course creatures discussion earth ecology effect energy environment examine exist extreme fact factor feet Figure functions glucose green GREEN AND RED green areas heat higher importance kind known latent less lichens light limits living matter living things lower maintain Mars Martian materials means Mercury method miles minute molecules night nitrogen observations organism oxygen photosynthesis physical physiological planetary possible present pressure principles problem produce question range reaches reason RED PLANET seen shown shows solar space square Strughold substance supply surface temperature University vapor various vegetation Venus zero