Are Edgeworth-Kuiper Belt Objects Pristine?

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Science  16 Aug 1996:
Vol. 273, Issue 5277, pp. 921
DOI: 10.1126/science.273.5277.921


Comets are thought to represent matter from the earliest times of the solar system. In his Perspective, Yamamoto discusses calculations by Farinella and Davis (p. 938) that cast doubt on whether comets are actually pristine fossils.