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Journey to the Planets (Wayzata)
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Journey to the Planets (Wayzata Technology) (1994).iso
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MARS
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D6.BAK
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1994-02-01
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658b
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The Martian atmosphere, like that of Venus, is primarily
carbon dioxide. Nitrogen and oxygen are present only in small
percentages. Martian air contains only about 1/1,000 as much
water as our air, but even this small amount can condense out,
forming clouds that ride high in the atmosphere or swirl around
the slopes of towering volcanoes. Local patches of early morning
fog can form in valleys.
There is evidence that in the past a denser martian
atmosphere may have allowed water to flow on the planet. Physical
features closely resembling shorelines, gorges, riverbeds and
islands suggest that great rivers once marked the planet.