Basically the evidence for past life on Mars is spotted by defining the rock and geological types where there are fossil indications ,shrinkage and valleys where water once flowed.
Basically there is a chain of geological grain that may link one place with another in a scale of events that define how water was once in motion and where to find the fossil evidence based on the identification of the soil types that have fossil appearance. |
scifi science as possibility of mapping layer "scapes", of the types of geological sedimentary and ancient rock strata.
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nasa
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nasa
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