NASA NTRS · 19840027188
On Mars
Abstract
The following aspects of the planet Mars were assessed directly and indirectly by the Viking lander and Viking orbiter spacecraft: the atmosphere, craters, volcanoes, terrain, geology, and evolution. Descriptions of these aspects are included herein. It is concluded that though life is certainly not abundant on Mars, the possibility still exists that some form of life is extant there.
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1984-01-01. On Mars. https://ntrs.nasa.gov/citations/19840027188
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