Missions to Mars
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In 1975, NASA launched two spacecraft called Viking 1 and Viking 2. The spacecraft reached Mars nearly one year later. Find out more in Missions to Mars, one of the titles in the Space Exploration series
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In 1975, NASA launched two spacecraft called Viking 1 and Viking 2. The spacecraft reached Mars nearly one year later. Find out more in Missions to Mars, one of the titles in the Space Exploration series
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