Feelings of a ghostly presence - the sense that someone is close-by when no-one is there - lie in the mind, a study has concluded.
Scientists say that they have identified the parts of the brain that are responsible for generating these spooky sensations.
They have also created an experiment that makes some people feel like there is a ghost nearby.

Source: http://www.ereporter.com.ng/index.php/more-news/science-tech-news/item/1117-ghostly-presence-created-in-lab