Source of ghosts in doubt after research

Doubts have been cast on the theory that magnetic fields spark religious or spiritual feelings after researchers have been unable to reproduce key results. As Nature http://www.nature.com reports, scientists have always claimed in the past that such feelings result from excessive bursts of electrical activity in the brain. However, the repetition of a study by a group of Swedish researchers originally carried out 20 years ago has failed to give an ultimate answer. If the traditional theory is wrong, it could leave scientists baffled as to why such thoughts and sensations are generated.