UNIVERSE
SPACE EXPLORATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Viking discovered a form of life on Mars that does not require water to thrive
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Viking did not discover larger life forms on Mars, but did find some Mars bacteria
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Viking did not discover life on Mars today, but did find a lot of fossils indicating Mars had life in the past
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Viking found that the surface of Mars in the two places it searched did not have any life or even life’s building blocks
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Detailed explanation-1: -In the years since Viking, perchlorate salts had been found in the Martian soil, which have been suggested as an explanation for the lack of organics seen by Viking, since they can destroy organics.
Detailed explanation-2: -Life on Mars? Of all the planets in our solar system, Mars is nearest in location and physical conditions to our Earth. So the scientists behind the Viking Mission were hopeful of finding life on Mars.
Detailed explanation-3: -The first three gave positive results, but the complete absence of any organic compounds in the Martian soil according to the mass spectrometer experiment suggests that the positive results for the first three were not evidence for life, but rather evidence for a complex inorganic chemistry in the Martian soil.