Mountain climbers facing extreme climatic conditions, patients affected by schizophrenia or neurological disorders and athletes facing severe exhaustion have all reported experiencing an invisible and yet persistent “presence” that is often felt just outside their field of view. Researchers at the École polytechnique fédérale de Lausanne (EPFL) have now recreated the same sensations in perfectly healthy subjects, inducing ghostly hallucinations in a matter of minutes.
via Gizmag
