Science
John Glenn was the first American to orbit the earth, in how long a flight?
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How do scientists refer to the direction from which the wind is blowing?
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What is a space which is entirely devoid of matter called in science terms?
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In what year did Einstein submit his paper containing the correct field equations of general relativity?
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Mariner IV sent the first pictures of which planet back to earth?
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Where on the moon did people first land a spacecraft?
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What are materials that come from the earth called?
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