Scientists today are interested in searching for life on Mars be-cause (a) we see clear
Chapter 1, Problem 18(choose chapter or problem)
Scientists today are interested in searching for life on Mars be-cause (a) we see clear evidence of a past civilization on Mars;(b) Mars contains frozen water ice at its polar caps; (c) evidencesuggests that Mars had liquid water on its surface in the distantpast.
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