Do all human bodies decompose? Not all...
"The incorruptibles are the handful of catholic saints who died throughout the years, yet their bodies, or parts of their bodies, will not decay or surrender to decomposition as a normal body would. One human relic even dates back to the year 1381, the head of Saint Catherine of Sienna. These bodies had not gone through any embalming or mummification methods to prevent them from decomposition, yet their bodies, or some parts of their bodies, remain intact.
It is said that many of the incorruptibles' bodies died from violent matters or harsh diseases. A lot of the bodies had been buried regularly within damp conditions, to be exhumed on a far later date. When these bodies were finally exhumed, a lot of them had their clothes disintegrated from bad burial conditions, yet their bodies remained the same, and sometimes looked as if they were still alive, or had just passed on."
