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Nature 394, 727 (20 August 1998) | doi:10.1038/29412
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Daedalus: Defossilization
David Jones
When a dead creature is fossilized, its organic remains are replaced by a mineral. Many fossils preserve the structure of the original organism with microscopic fidelity, as if the tissue had been replaced molecule by molecule by precipitated mineral — silica, calcium carbonate, or whatever.
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