What evidence have some scientists claimed for ancient life on Mars (although the hypothesis has been strongly disputed by many other scientists) ?
A) an apparent thumbprint on a rock at the Mars Pathfinder landing site
B) peroxides in the "soil" (regolith) found by experiments on the Viking landers
C) microscopic features in a Martian meteorite similar to biologically generated features on Earth
D) calcium carbonate deposits similar to seashells in a sample of Martian limestone
Correct Answer:
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Q238: What is the strongest evidence for liquid
Q239: In view of the present surface and
Q240: Experiments carried out to detect life on
Q241: The Martian moon Phobos orbits near the
Q242: The exploratory life-sciences experiments aboard the Viking
Q244: The shapes and sizes of the two
Q245: The unstable chemicals dissolved in the Martian
Q246: Which of these craters are the youngest?
A)
Q247: Phobos orbits Mars in a prograde orbit
Q248: According to modern dynamo theory, the production
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