Photographs of ghosts: real or fake?

Scientists have been stumped by a series of ghost photographs after appealing for members of the public to send in their most spooky images.

Psychologist Richard Wiseman and his team received 250 images which showed mysterious-looking orbs, mists, figures and faces.  

While they say many can be explained by camera flash reflecting off dust, condensed breath in front of the lens or people selecting the wrong exposure length, others have left them scratching their heads.

A public vote of over 250,000 people - part of Edinburgh International Science Festival - picked the five most spooky ghost photographs which are shown here...

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