| Question 1: However, dry areas of ________ do not have detectable organic compounds either, but they have organisms living in the rocks. | |||
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| Question 2: [19] The ________ discovered the chemical perchlorate in the Martian Soil. | |||
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| Question 3: Viking 1 was the first of two spacecraft sent to ________ as part of NASA's Viking program. | |||
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| Question 4: Landing on Mars was planned for July 4, 1976, the ________, but imaging of the primary landing site showed it was too rough for a safe landing. | |||
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