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Spontaneous human combustion

Spontaneous human combustion (SHC) is the burning of a person's body without the apparent presence of an external source of ignition. While the cause of such combustion remained for many years a complete mystery it is now generally accepted that the most probable cause of SHC seems to be a Wick Effect fire. The Wick Effect is discussed below.

Table of contents
1 Characteristics
2 Complications
3 Theories
4 See also
5 External links


There are many characteristics that together distinguish SHC from other forms of fire.


Being more than 75%
water, the human body does not burn very well. However, in many cases of SHC, victims' bodies were reduced to cinders. To render the body to such a state requires temperatures of more than 1700° C (3000° F). Even in modern crematoria, which have temperatures around 1100° C (2000° F), the bones cannot be broken down completely and have to be ground into smaller pieces.

Many murderers have tried to burn their victims (in fact, many have attempted to cover up their crimes by SHC). However, once the accelerant is burnt up, the victim will stop burning. This is true in the case of Adolf Hitler, whose body was burnt after he committed suicide. However, his body was still easily identifiable even though more than 20 litres of fuel was used. Moreover, forensic investigation reveals no use of accelerants in suspected SHC cases.


Of course, as with any apparently anomalous phenomenon, there are a number of theories that attempt to explain how SHC happens. Most have a scientific basis; some do not.

The 'Wick' Effect

The wick effect essentially says that a person is burned through his own
fats after being ignited, accidentally or otherwise. The clothed human body is like an 'inside-out' candle: the human fat (the fuel source) is inside and the clothes of the victim (the wick) is outside. Hence there was a continuous supply of fuel, in the form of fat that melted and dripped to the victims' clothing.


Using a dead pig wrapped in a blanket and placed in a mocked-up room, BBC set out to prove the 'wick' theory in its science television show QED. A small amount of petrol was poured on the blanket as an accelerant. After igniting the petrol, the researchers left it to burn by itself. The temperature of the fire was regularly recorded and it was only around 800° C (1472° F). As the fire burned through the pig's skin, it melted its subcutaneous fats, which flowed onto the blanket. Bone marrow, which also contains a high amount of fats, also contributed to the burning. The surrounding furniture was not burnt although a television placed above a cupboard had its plastic cover melted. The fire had to be manually extinguished after seven hours. The majority of the pig's body had been burnt to ashes.

From the experiment, the BBC researchers explained the following characteristics of SHC:

Charles Dickens used spontaneous human combustion as a plot device in his novel Bleak House (1853), which added considerably to interest in the subject.

See also

External links