Ashes to ashes

Learned people in the 17th and 18th century knew that corpses can be fully or partially preserved for a long period. Some three hundred years later, the processes involved in decomposition are still a matter of research, as this German documentary shows. The background is the problem of corpses not decomposing in the cemeteries as fast as necessary, and the aim is to speed up the process 'ashes to ashes, dust to dust'...