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What products from the living body has DNA in it that can tell someone this ___ sample is from Molly, not Mavin?
More to the point, which traces of the body (leg hair, fingernails, earwax, saliva, snot, chapped lip peelings, dislocated eyeballs, etc.) can be used by forensic analysts to identify who is whom?
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As human beings, our greatness lies not so much in being able to remake the world (that is the myth of the Atomic Age) as in being able to remake ourselves. —Mohandas K. Gandhi
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