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In the 1959 horror film The Tingler, actor Vincent Price's character promotes this longstanding myth: that your hair and nails will continue to grow after you die. Price, playing a pathologist who regularly conducts autopsies, says something along the lines of: You know, of course, that after death, great many things continue to live in the body. Fingernails grow, and so does hair. Creepy facts have their appeal, chief among them a morbid-fascination factor. Although the true details of what happens to bodies after death is not intelligence suitable for the even mildly squeamish (The first sign of putrefaction is a greenish skin discoloration appearing on the right lower abdomen about the second or third day after death, begins Kenneth Iserson’s gruesomely detailed description in Death to Dust), we nonetheless delight in sharing what we believe are priceless tidbits of knowledge on this subject. Not surprisingly, the one factlet most often offered up as revealed truth is wholly false: your hair and nails do not continue to grow after you die. Rather, any perceived length is an optical illusion. The sorry fact of the matter is that we dehydrate after dying. Our flesh dries and, in so doing, pulls away from nails and hair. Thus, though the nail on our big toe, for example, remains the same length as before, the toe it is seated upon shrinks. Because we are accustomed to nails and hair growing — not hands, feet, and heads shrinking — we perceive this change as an increase in one rather than a decline in the other. To quote the respected forensic anthropologist William R. Maples: To combat this shrinkage, funeral homes slather moisturizing cream on bodies, particularly on the faces of men with heavy beards. Among the living, fingernail growth averages about a 10th of a millimeter per day, with toenails growing about a half to a third slower. However, drugs or disease can affect these rates. The middle and fourth fingers’ nails tend to grow a little faster than those of the fifth and thumb. Bodies appear to do strange things after death, but all of them are attributable to the decomposition process rather than supernatural forces. At times, a moldering body will make noise, but that is only the sound of gas (a natural byproduct of the putrefaction process) escaping from the human vessel that previously contained it.
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