was made public Friday by Richard Wiseman , a professor of psychology at the University of Hertfordshire who also studies the paranormal . Wiseman said he was looking for `` photographic evidence for ghosts '' ahead of a session on the subject at the Edinburgh International Science Festival next week . See gallery of haunted photographs '' Wiseman solicited such photos from around the world and collated them for the conference . He said the majority of images showed mysterious-looking orbs , mists , figures and faces . In one picture , a face appears in the side-view mirror of a parked Mercedes convertible . The photographer insists no one was around when he took the picture ; skeptics say the mirror could be reflecting the headrest or be the result of digital manipulation . Another photo of a person walking through a creek in the woods appears to show a second person wearing a hooded sweatshirt , standing on a rock nearby . Skeptics say the `` figure '' is an illusion created by tree branches and the rock formation in the background . Two friends raising a drink to the camera in a third photograph are joined by
-LRB- CNN -RRB- -- The figure peers down silently from an upper floor of the ruins of a Scottish castle , wearing what looks like an outfit from the Middle Ages . Could this be a long-dead Scottish earl , or just a random , modern-day visitor ? The mysterious image captured by Chris Aitchison at Tantallon Castle in eastern Scotland . The eerie image is captured in a photograph taken by tourist Christopher Aitchison in May 2008 at Tantallon Castle , which sits on a rocky outcrop along the Scottish coast , east of Edinburgh . The `` person '' appears to be wearing an old-style greenish ruff around the neck . Aitchison insists he did not tamper with the image and can not explain it . `` I was not aware of anyone , or anything , being present in my picture , only noticing the anomaly when I got home , '' Aitchison said . `` Staff have verified that there were no sinister dummies in period costume or historical reenactments going on that day at the castle . I did not notice any nice old ladies wearing ruffs walking around the stairs ! '' The picture