Korean mummies are perfectly preserved “dead bodies” according to one Russian archaeologist, due to the way they were buried.
During the Joseon Dynasty (1392-1910), the upper classes placed their dead in hoegyeok, a type of tomb. The corpses were put in double-sided coffins and covered with a layer of a limestone mixture, or hoe. This process completely isolated the body from water and air, which cause decay.
The exceptional quality of the mummies, artifacts inside the tomb and body parts, from the brain to the intestines, has allowed scientists to answer questions about everyday life in those times. They were able to identify not only the cause of death but also what the usual diet was and the rampant illnesses of those days.