Experts from across the globe are taking part in a series of spooky investigations in Edinburgh to find out if ghosts really do exist.
The first international study into paranormal experiences was launched in the vaults of the capital's Nicol Edwards pub, with experts keen to hear the nation's spookiest tales.
Professor Richard Wiseman from the University of Hertfordshire is involved in a project into the psychology of the paranormal. Asked if he believes in ghosts, he replied: "I am a bit of a sceptic. I think there has to be a scientific explanation for most things."
He added: "Over the years we have carried out a number of investigations in vaults around Edinburgh with tales of people feeling a presence, hearing footprints, seeing shadows."
In 2001 Mr Wiseman was involved in a ten-day study of the Edinburgh Castle vaults, which involved some 240 members of the public. The team used scientific equipment to measure phenomena including temperature, magnetic fields and light levels.
Tests took place in vaults which had a reputation for being haunted and others that did not. Although those involved were unaware which was which, they reported strange results from the chambers that were reputedly haunted.
Mr Wiseman explained the current project: "We want to hear from anyone with a ghostly photo, something unusual.
"We want them to go on to our website and look at our photos, ask them how they would explain it and finally we will get our panel of experts to look into them all and see if once and for all we can decide if ghosts really do exist."
Mr Wiseman will host a one-day public event on April 4 at the University of Edinburgh, with talks looking at the history and science of hauntings as part of the Edinburgh Science Festival.
You can get more information on the project and the event on Professor Wiseman's website.
Last updated: 10 March 2009, 15:33