It is no wonder that the planet Mars is named for the Roman God of War. Its bright, blood-red color is in stark contrast to the night sky and must have inspired visions of battle to ancient observers. In the last hundred years or so, the Red Planet, like Venus, has evoked speculations on bizarre lifeforms, advanced civilizations, and Earthlike climates ranging from cold and wet to hot and dry.
KeywordsImpact Crater Shield Volcano Outflow Channel Viking Orbiter Crater Count
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