“Ghosts are the mind’s way of interpreting how the body reacts to certain surroundings, say UK psychologists.

Dr Wiseman’s team used hundreds of volunteers

A chill in the air, low-light conditions and even magnetic fields may trigger feelings that “a presence” is in a room – but that is all they are, feelings.

This explanation of ghosts is the result of a large study in which researchers led hundreds of volunteers around two of the UK’s supposedly most haunted locations – Hampton Court Palace, England, and the South Bridge Vaults in Edinburgh, Scotland.” BBC

[British psychologist Wiseman was also the one who recently reprised Stanley Milgram’s ‘six degrees of separation’ experiment, about which I wrote below.]