Science
John Glenn was the first American to orbit the earth, in how long a flight?
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At which angle should a cannon be aimed to maximize distance?
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Where is the observatory where Percival Lowell first theorized the existence of Pluto?
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Which is the notion that living things can come from nonliving things?
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During the seventeen hundreds, what creature was thought to excrete blood through its skin?
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What is the ripened ovary of a flower better known as?
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