Here he identifies the primary scientific objection to postmortem survival as physicalism, the metaphysical notion that nature is entire based on matter and energy. He points out that this common notion within academia is not a requirement of science. In fact, it has long been disputed within philosophy, going back to Plato, and is not [...]

Here he describes his research with spirit mediums in Brazil. While many mediums exhibit symptoms that are sometimes designated as signs of psychosis, he notes that they typically live productive and meaningful lives showing no signs of pathology. Experimental tests with the famous medium, Chico Xavier, indicated that letters he transmitted to grieving relatives from [...]