Near-Death Experiences Evidence for Their Reality - PMC - NIH
One study found that of such observations were completely accurate. Evidence of the Afterlife - The Science of Near...
: Hypoxia typically causes confusion and agitation, whereas NDEs are characterized by clarity and peace. Near-Death Experiences Evidence for Their Reality - PMC
: While endorphins can reduce pain, they linger in the system for minutes; NDE sensations of bliss typically end instantly when a patient is resuscitated. Evidence of the Afterlife - The Science of Near...
Only of these encounters involve living persons, and some involve meeting relatives the experiencer didn't even know were dead.
Science often looks for physical causes, but many common theories struggle to explain the full NDE phenomenon:
: Reports of "out-of-body" experiences (OBEs) where patients accurately describe events occurring while they were clinically dead.