Smarty Pants Quiz
09
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What was the first US spacecraft to successfully land on Mars in 1975?
Viking 1
Spirit
Opportunity
Pathfinder
Wrong! Try again!
Viking 1 returned detailed images of the Martian surface for 6 years.
Alright, pretty good, try this!
09
00
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What was the first US spacecraft to successfully land on Mars in 1975?
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