Our current understanding of the terrestrial worlds allows us to paint a broad-brush overview of their geological histor

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Our current understanding of the terrestrial worlds allows us topaint a broad-brush overview of their geological histories, but westill have much more to learn. Choose one important butunanswered question related to the geology of the terrestrialworlds, and describe why the question is important and how we mightanswer it in the future. Be as specific as possible, focusingon the type of evidence necessary to answer the question and howthe evidence could be gathered.