Near-death experiences exposed: Surge of brain activity after the heart stops may trigger paranormal visions

Some believe they have caught a glimpse of the afterlife, others claim to have floated above their body, watching as medics save their lives.

But the reality of near-death experiences may be much more prosaic.

Research suggests that far from being a brush with the afterlife, they are caused by a rush of electrical activity in the dying brain.

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