Prominent among the stones of a fireplace in my country den, one large rounded giant stands out. It was bourne by the glacial streams from a more northern resting place and is marked by a fossil of a mollusk that inhabited northern seas many million years ago. Yet in spite of the eons of time that have passed it can be compared with specimens of mollusks that live to-day. Down through the countless centuries the living stream has carved its structural habitations in much the same form. The science of Paleontology has collected this history and has attempted a reconstruction of life from its beginnings.

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