Carl Sagan: Celebrated Cosmos Scholar

Carl Sagan: Celebrated Cosmos Scholar

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Meet Carl Sagan, known for his research on extraterrestrial life! Follow Sagan's story as he theorizes on the temperature of Venus's surface, works with NASA to build the Mariner 2,...
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Ages: 8-10
Read time: 15-30 mins
AR LEVEL: 5.9
LEXILE©: 840L
Ages: 8-10
Read time: 15-30 mins

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