Spontaneous Human Combustion

Spontaneous human combustion (SHC) describes reported cases of the burning of a living human body without an apparent external source of ignition. There have been about 200 cited cases worldwide over a period of around 300 years.
There are also many hypotheses which attempt to explain the various cases of human spontaneous combustion:
Paranormal explanations (e.g., a ghost or divine intervention)
Natural explanations based on an unknown and otherwise unobserved phenomenon (e.g., production of abnormally concentrated gas or raised levels of blood alcohol cause spontaneous ignition)
Natural explanations that involve an external source of ignition (e.g., the victim dropped a cigarette)
Objections to natural explanations typically refer to the degree of burning of the body with respect to its surroundings. Indeed, one of the common markers of a case of SHC is that the body — or part of it — suffered an extraordinarily large degree of burning, with surroundings or lower limbs comparatively undamaged. Despite scientific evidence, supernatural explanations of spontaneous human combustion remain popular.

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