Smarty Pants Quiz
09
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What was the first US spacecraft to successfully land on Mars in 1975?
Spirit
Pathfinder
Viking 1
Opportunity
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Viking 1 returned detailed images of the Martian surface for 6 years.
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09
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00
What was the first US spacecraft to successfully land on Mars in 1975?
10 of 23 people (43.48%) answered this question correctly.
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