And so, little by little, have been pieced together the fragments from which we have derived our knowledge of the past, and thus has the palæontologist read the riddles of the rocks. [Please select]
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These details sound like the description given by a palæontologist of the mutations in form, of the first appearance, the increasing rarity, and final extinction of fossil species, embedded in the successive stages of a geological formation. [Please select]
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